Relevant bibliographies by topics / Complexe collisionnel

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  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Complexe collisionnel'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Complexe collisionnel"

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Boursier, C., B. Mandal, D. Babikov, and M. L. Dubernet. "New H2O–H2O collisional rate coefficients for cometary applications." Monthly Notices of the Royal Astronomical Society 498, no. 4 (September 8, 2020): 5489–97. http://dx.doi.org/10.1093/mnras/staa2713.

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ABSTRACT We re-introduce a semiclassical methodology based on theories developed for the determination of broadening coefficients. We show that this simple and extremely fast methodology provides results that are in good agreement with results obtained using the more sophisticate MQCT approach. This semiclassical methodology could be an alternative approach which allows to provide large sets of collisional data for very complex molecular systems. It saves time both on the determination of potential energy surfaces and on the collisional dynamical calculations. In addition, this paper provides more complete sets of rotational de-excitation cross-sections and rate coefficients of H2O perturbed by a thermal average of water molecules. Those data can be used in the radiative transfer modelling of cometary atmospheres.
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Abel, Martin, Lothar Frommhold, Xiaoping Li, and K. L. C. Hunt. "Comparison of the Calculated Collision-Induced Absorption Spectra by Dense Hydrogen-Helium, Deuterium-Helium, and Tritium-Helium Gas Mixtures." Journal of Atomic, Molecular, and Optical Physics 2011 (October 11, 2011): 1–3. http://dx.doi.org/10.1155/2011/470530.

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We have recently determined the induced dipole surface (IDS) and potential energy surface (PES) of collisional H2-He complexes. We have used these surfaces to compute the binary collision-induced absorption spectra of H2 molecules interacting with He atoms and of D2 molecules interacting with He atoms. Here we extend these calculations to the case of T2 molecules interacting with He atoms. Whereas the electronic structure of X2-He is virtually the same for all hydrogen isotopes X = H, D, or T, the collisional dynamics and molecular scattering wave functions are different for the different collisional pairs. We have calculated spectra up to a temperature of 9000 K and frequencies up to 20,000 cm−1. Here we compare the calculated collision-induced absorption spectra for the different hydrogen isotopes. While we have observed reasonable agreement between our calculations and laboratory measurements for the collisional H2-He and D2-He complexes, there are no laboratory measurements for T2-He collisional complexes, and one must rely on the fundamental theory, supported by the agreement between theory and experiment for the other isotopes.
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Shin, H. K. "Collisional energy flow in weakly bound complexes." Journal of Chemical Physics 87, no. 2 (July 15, 1987): 993–1000. http://dx.doi.org/10.1063/1.453254.

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Abel, Martin, and Lothar Frommhold. "Collision-induced spectra and current astronomical research." Canadian Journal of Physics 91, no. 11 (November 2013): 857–69. http://dx.doi.org/10.1139/cjp-2012-0532.

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Collision-induced spectra are the spectra of complexes of two or more atoms or molecules in a “fly-by” collisional encounter. Collision-induced absorption (CIA) has been observed in many dense gases and gas mixtures, in most cases at infrared frequencies in the form of quasi continua, and also in liquids and solids. CIA spectra of several binary complexes have been computed using modern quantum chemical methods, combined with molecular scattering theory, which couples the collisional complex to the radiation field as usual in other spectroscopic work. Binary collisional systems, such as H2 interacting with another H2 molecule, or with a helium or hydrogen atom, are first candidates for such computational work, owing to their small number of electrons and the astrophysical interest in such systems. The computed CIA spectra are found to be in close agreement with existing laboratory measurements of such spectra. Laboratory measurements exist at a limited selection of temperatures around 300 K and lower, but theory currently also provides CIA data for temperatures up to 9000 K and for higher frequencies (well into the visible), on a dense grid of temperatures and frequencies. For such calculations, detailed potential energy surfaces (PES) of the supermolecular complexes, along with the induced dipole surfaces (IDS), are needed so that the rotovibrational matrix elements of PES and IDS may be computed for the molecules involved, which may be highly rotovibrationally excited. Modern astronomical research needs opacity tables for analyses of the atmospheres of “cool” objects, such as cool white dwarfs, solar and extrasolar planets and their big moons, cool main sequence stars, and “first” stars, which are briefly described in a concluding section.
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MEDEIROS, SILVIA R., CRISTINA M. WIEDEMANN-LEONARDOS, and SIMON VRIEND. "Evidence of mingling between contrasting magmas in a deep plutonic environment: the example of Várzea Alegre, in the Ribeira Mobile Belt, Espírito Santo, Brazil." Anais da Academia Brasileira de Ciências 73, no. 1 (March 2001): 99–119. http://dx.doi.org/10.1590/s0001-37652001000100009.

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At the end of the geotectonic cycle that shaped the northern segment of the Ribeira Mobile Belt (Upper Proterozoic to Paleozoic age), a late to post-collisional set of plutonic complexes, consisting of a wide range of lithotypes, intruded all metamorphic units. The Várzea Alegre Intrusive Complex is a post-collisional complex. The younger intrusion consists of an inversely zoned multistage structure envolved by a large early emplaced ring of megaporphyritic charnoenderbitic rocks. The combination of field, petrographic and geochemical data reveals the presence of at least two different series of igneous rocks. The first originated from the partial melting of the mantle. This was previously enriched in incompatible elements, low and intermediate REE and some HFS-elements. A second enrichment in LREE and incompatible elements in this series was due to the mingling with a crustal granitic magma. This mingling process changed the composition of the original tholeiitic magma towards a medium-K calc-alkalic magma to produce a suite of basic to intermediate rock types. The granitic magma from the second high-K, calc-alkalic suite originated from the partial melting of the continental crust, but with strong influence of mantle-derived melts.
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Landreh, Michael, Idlir Liko, Povilas Uzdavinys, Mathieu Coincon, Jonathan T. S. Hopper, David Drew, and Carol V. Robinson. "Controlling release, unfolding and dissociation of membrane protein complexes in the gas phase through collisional cooling." Chemical Communications 51, no. 85 (2015): 15582–84. http://dx.doi.org/10.1039/c5cc07045g.

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Benesch, Justin L. P. "Collisional activation of protein complexes: Picking up the pieces." Journal of the American Society for Mass Spectrometry 20, no. 3 (March 2009): 341–48. http://dx.doi.org/10.1016/j.jasms.2008.11.014.

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Dimitrijević, Milan S., Vladimir A. Srećković, Alaa Abo Zalam, Nikolai N. Bezuglov, and Andrey N. Klyucharev. "Dynamic Instability of Rydberg Atomic Complexes." Atoms 7, no. 1 (February 8, 2019): 22. http://dx.doi.org/10.3390/atoms7010022.

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Atoms and molecules in highly excited (Rydberg) states have a number of unique characteristics due to the strong dependence of their properties on the values of principal quantum numbers. The paper discusses the results of an investigation of collisional Rydberg complexes specific features, resulting in the development of dynamic chaos and the accompanying diffusion autoionization processes. It is shown (experiment and theory) that, in subthermal low energies, the global chaotic regime that evolved in quasimolecular systems leads to significant changes in the Rydberg gases radiation/ionization kinetics. The effect of Förster resonance on the width of the fluorescence spectra and stochastic ionization processes in Rydberg systems is also discussed.
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Borysow, Aleksandra. "Pressure-Induced Molecular Absorption in Stellar Atmospheres." International Astronomical Union Colloquium 146 (1994): 209–22. http://dx.doi.org/10.1017/s0252921100021345.

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Pressure-induced absorption arises in complexes of two or more inert atoms or molecules, due to dipole moments induced during the collisional interaction. The term “pressure-induced” still prevails in the astrophysical literature, yet “collision-induced” absorption (CIA), or “interaction-induced” absorption seems more appropriate and is commonly used elsewhere. Ordinary absorption processes in the infrared arise from individual, polar molecules interacting with electromagnetic radiation. As a consequence, the intensity of the allowed lines increases linearly with density. CIA, on the other hand, is most striking in gases composed of nonpolar, infrared-inactive molecules. Induced spectral lines are observed at rovibrational frequencies which are dipole-forbidden in single (i.e. non-interacting) molecules. Dipole transitions may, however, beinducedin the interacting pair. The new symmetry of the electronic cloud of a collisional complex may be very different from those of the isolated molecules and thus commonly allows for a transient dipole, which then interacts with radiation. Collision-induced absorption increases quadratically in the low density limit, thus reflecting the two-body origin of the basic absorption process. At higher gas densities, ternary interactions become significant and cubic and higher-order contributions to the observable absorption are then commonly seen.
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Boomeri, Mohammad, Rahele Moradi, and Sasan Bagheri. "Petrology and origin of the Lar igneous complex of the Sistan suture zone, Iran." Geologos 26, no. 1 (April 1, 2020): 51–64. http://dx.doi.org/10.2478/logos-2020-0004.

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AbstractThe Oligocene Lar igneous complex is located in the Sistan suture zone of Iran, being emplaced in Paleocene to Eocene flysch-type rocks. This complex includes mainly intermediate K-rich volcanic (trachyte, latite and andesite) and plutonic (syenite and monzonite) rocks that belong to shoshonitic magma. The geochemical characteristics of the Lar igneous complex, such as an enrichment of LREE and LILE relative to HREE and HFSE, respectively, a negative anomaly of Ti, Ba and Nb and a positive anomaly of Rb and Th are similar to those of arc-type igneous rocks. Tectonic discrimination diagrams also show that rocks of the Lar igneous complex fall within the arc-related and post-collisional fields and K-enrichment of these rocks confirm the post-collisional setting. Based on geochemical features, the Lar igneous complex magma was derived from partial melting of a phlogopite-bearing, enriched and metasomatised lithospheric mantle source and the magma was affected by some evolutionary processes like fractional crystallisation and crustal contamination.
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Dissertations / Theses on the topic "Complexe collisionnel"

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Spielfiedel, Annie. "Analyse spectroscopique d'un complexe collisionnel et redistribution du rayonnement." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37618683p.

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Chaudhuri, Manis. "Electric potential and ion drag force in highly collisional complex plasma." Diss., kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/9178/.

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Centeno, Adrio Peixoto. "Os granitóides sintectônicos pós-colisionais Sanga do Areal, intrusivos no Complexo Arroio dos Ratos, na Região de Quitéria, RS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/70407.

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Esta dissertação faz parte de um projeto que tem como objetivo investigar a origem e evolução do magmatismo de arco e pós-colisional do Escudo Sul-rio-grandense (ESRG), caracterizando a partir de estudos geoquímicos, estruturais e petrográficos os Granitóides Sanga do Areal (GSA), localizados na região de Quitéria, porção leste do Escudo Sul-rio-grandense. Estes granitóides consistem de dois corpos principais, alongados na direção NE-SW, com aproximadamente 14 km de extensão e 2 km de largura, e também de diversas intrusões menores, posicionadas, preferencialmente, na porção mediana de alta deformação cisalhante do Complexo Arroio dos Ratos. Estão em contato na porção NW com metatonalitos, metagranodioritos e gnaisses tonalíticos a dioríticos de idade paleoproterozóica do referido complexo e com horblenda-biotita granodioritos da unidade neoproterozóica Granodiorito Cruzeiro do Sul. Na porção SE o contato se dá com tonalitos a dioritos relacionados aos Granitóides Arroio Divisa de idade neoproterozóica. Os GSA são biotita monzogranitos de textura porfirítica em seu termo principal, com cerca de 30% de megacristais de até 5 cm de comprimento de plagioclásio e K-feldspato. A matriz heterogranular média a grossa é composta por quartzo fitado, feldspato parcialmente recristalizado e biotita. Subordinadamente, observam-se corpos de espessura centimétrica a métrica de biotita granodiorito equigranular médio, com fenocristais esparsos de feldspatos alinhados na foliação. Raramente ocorrem enclaves microgranulares máficos. A foliação milonítica é bem marcada pela orientação da biotita, dos megacristais lenticulares e do quartzo fitado e tem direção E-W, com alto ângulo de mergulho para N e para S, contendo lineação de estiramento direcional, com baixo caimento para W a SW. A foliação ígnea primária, concordante a sub-concordante com a foliação milonítica, tem ocorrência restrita e é marcada pela orientação dos megacristais não deformados e das lamelas de biotita. Estruturas S-C, caudas assimétricas em porfiroclastos de feldspatos, biotita fish e fitas assimétricas de quartzo são consistentes e indicam movimento transcorrente sinistral. Os Granitóides Sanga do Areal têm afinidade sub-alcalina médio a alto K, provavelmente toleítica, compatível com ambiente pós-colisional, onde foram deformados e controlados por zonas de cisalhamento transcorrente sub-verticais. Foi obtida uma idade U-Pb em zircão dos granitóides de 626,6±4,9 Ma (MSWD=2.2), coerente com as relações de campo.
This research investigates the evolution of arc to post-collisional magmatism in the Sul-rio-grandense Shield (ESGR), using geochemistry, structural and petrographic studies of the Sanga do Areal Granitoids (GSA). These granitoids are located in the Quitéria region, east of ESRG. The GSA form two main, NE-striking intrusions, and several other small ones, mainly within the shear zone croscutting the central portion of the Arroio dos Ratos Complex. The two main bodies are about 14 km long and 2 km wide. To the northwest, the GSA rocks are in contact with Paleoproterozoic metatonalites, metagranodiorites, tonalitic to dioritic gneisses of the Complex, and Neoproterozoic horblende-biotite granodiorites of the Cruzeiro do Sul unit. To the southeast, they are surrounded by tonalitic to dioritic rocks, related to the Neoproterozoic Arroio da Divisa Granitoids. The GSA rocks are composed mainly of porphyritic biotite monzogranites, with about 30% megacrysts of plagioclase and 5 cm long K-feldspar. The medium to coarse grained heterogranular groundmass is composed of microcrystalline ribbon quartz, partially re-crystallized feldspar and biotite. Medium-grained equigranular granodiorite occurs as centimeter to meter- thick bodies, with sparse feldspar megacrysts aligned on the foliation plane. Microgranular mafic enclaves are rarely observed within the GSA rocks. The mylonitic foliation is well-developed and marked by biotite, oriented lenticular megacrysts, as well as quartz ribbons. It strikes E-W and dips at high angles either N or S. The stretching lineation within the foliation shows shallow plunges, preferentially W-SW. A primary igneous foliation is sometimes observed, and it is concordant or sub-concordant with the mylonitic one, and marked by orientation of igneous megacrysts and biotite lamellae. S-C structures, asymetric tails in feldspar porphyroclasts, biotite fish, and asymetric quartz ribbons indicate transcurrent movement with consistent sinistral shear sense. The Sanga do Areal Granitoids show subalkaline medium- to high-K affinity, probably tholeiitic, and trace element composition consistent with sources related to post-collisional settings, which were deformed and controlled by E-NE and NE sub-vertical transcurrent shear zones. A U-Pb age in zircon grains from Sanga do Areal Granitoids of 626.6 ± 4.6Ma ((MSWD=2.2) was obtained and considered coherent with stratigraphic relations.
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Simões, Matheus Silva. "O Complexo máfico-ultramáfico Mata Grande, São Sepé, RS : petrologia e geocronologia." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/94681.

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O Complexo Máfico-Ultramáfico Mata Grande (CMG), localizado no município de São Sepé, porção NW do Escudo Sul-Rio-Grandense, é uma intrusão máfico-ultramáfica com cerca de 5 km2 que mantém contatos através de falhas normais com gnaisses do Complexo Cambaí ao SW e ao SE, e com as rochas sedimentares da Bacia do Paraná ao N. O contato com os xistos magnesianos e serpentinitos do Complexo Arroio Lajeadinho situados ao leste é intrusivo. Foram descritas três unidades de rochas cumuláticas: Unidade Máfica (UM), Unidade Ultramáfica (UUM) e Unidade Transicional (UT). A principal estrutura primária é um acamamento composicional/textural milimétrico a centimétrico e uma intercalação de camadas das unidades em escalas de afloramento e regional. As rochas da UM cristalizaram a partir da acumulação de cristais de plagioclásio e, em menor proporção, de olivina, além de fases minerais intercúmulus, que representam de 24% a 41% de líquido intersticial aprisionado nesta acumulação. Na UT, a acumulação de plagioclásio e olivina ocorreu em proporções muito próximas, com uma menor proporção do líquido aprisionado (cerca de 15%). As amostras da UUM evidenciam uma acumulação principal de olivina com plagioclásio intercúmulus mais uma proporção do líquido intersticial (20%). Todas as unidades do CMG são afetadas pelo metamorfismo de contato causado pelo Granito São Sepé, sob condições de temperatura equivalentes às das fácies albita-epidoto hornfels e hornblenda hornfels. Os dados de geoquímica em rocha total mostraram anomalias positivas de Ba e Sr e negativas de Nb para todas as amostras, indicando metassomatismo na fonte. O efeito da acumulação não exerce influência no comportamento destes elementos, tendo em vista a ausência de fases minerais com afinidade química para comportá-los. Os padrões de ETR são mais coerentes com trends cumuláticos. No entanto, a anomalia de Eu conspícua que ocorre nos cumulados de plagioclásio e mais acentuada nos cumulados de olivina sugere um enriquecimento prévio de Eu no magma. Os dados de U-Pb em zircões obtidos por LA-ICP-MS forneceram idades de zircões herdados das rochas (metavulcânicas do Complexo Bossoroca, 800-750 Ma; ortognaisses do Complexo Cambaí, 720 Ma; e granitóides da Suíte Lagoa da Meia-Lua, 680 Ma) e uma idade de cristalização magmática para o CMG (667.8 ± 3.3 Ma). Os dados de geoquímica e geocronologia favorecem a hipótese de um ambiente pós-colisional para a cristalização e colocação do Complexo Mata Grande. Processos de delaminação litosférica tais como slabbreakoff são sugeridos como fonte de calor para o magmatismo máfico pós-colisional. A placa oceanic partiu-se após a subducção abaixo do Arco de São Gabriel e a colisão com o Complexo Encantadas (2,2 Ga), um fragmento do Cráton Rio de La Plata, durante um periodo de extenso magmatismo juvenil associado à amalgamação do Supercontinente Godwana Ocidental.
The Mata Grande Mafíc-Ultramafic Complex (MGC), located at São Sepé municipality, NW portion of the Sul-Rio-Grandense Shield, is a 5 km2 mafic-ultramafic intrusion which maintains contacts by normal faults southwest with the gneisses of the Cambaí Complex and in north with the sedimentary rocks of the Paraná Basin. The contact southeast with magnesian schists and serpentinites of the Arroio Lajeadinho Complex is intrusive. Three cumulatic rock unities were described: Mafic Unit (MU), Ultramafic Unit (UMU) and Transicional Unit (TU). Preserved primary structures are composicional/textural millimetric to centimetric layering with no mineral lineation, outcrop scale intercalation and regional intercalation. UM rocks crystallized from accumulation of plagioclase crystals and, in less proportion, olivine crystals, and also from intercumulus phases, representing 24% - 41% of the interstitial trapped liquid in the accumulation. In UT, plagioclase and olivine accumulation occurred in very close proportions, with a minor trapped liquid proportion (~ 15%). UUM samples shows olivine principal accumulation with intercumulus plagioclase plus trapped liquid (20%). All CMG units are affected by contact metamorphism caused by São Sepé Granite, under albite-epidote hornfels and hornblende hornfels temperature conditions. Geochemical data are presented and Ba, Nb and Sr anomalies indicate previous metassomatism in the source. Accumulation effect on those anomalies is absent or has little influence, since there are no mineral phases capable to hold these elements in studied rocks. REE patterns are more consistent with cumulate trends. However, conspicuous Eu positive anomaly in the plagioclase cumulates and more accentuated in olivine accumulates suggests that there was an Eu enrichment in the magma. U-Pb zircon data obtained by in situ LA-ICP-MS yielded ages of inherited zircons from surrounding igneous and metamorphic rocks (Bossoroca Complex metavolcanic, 800- 750 Ma; Cambaí Complex orthogneiss, 720 Ma; and Lagoa da Meia-Lua Suite granitoids, 680 Ma) and a magmatic crystallization age for the MGC (667.8 ± 3.3 Ma). Either geochemical and isotope data allied with field relationships favor the hypothesis of a post-collisional environment for Mata Grande Complex crystallization and emplacement. Lithospheric delamination process such as slab-breakoff is suggested as source of heat for post-collisional mafic magmatism. The oceanic plate has broken down after subduction under São Gabriel Arc and its collision with 2,2 Ga Encantadas Complex, a Rio de La Plata Craton Fragment, in a extensive period of juvenile magmatism associated to Western Godwana Supercontinent amalgamation.
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Campos, Roberto Sacks de. "Petrologia, caracterização geológica, geoquímica e geocronológica do magmatismo pré, sin e pós-colisional presente no Complexo Metamórfico Brusque nas regiões de Itapema e Botuverá, Santa Catarina, Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/32594.

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Este trabalho objetiva a caracterização petrológica, geoquímica, geocronológica e metamórfica das rochas ortoderivadas pertencentes ao Complexo Metamórfico Brusque em duas regiões: Itapema e Botuverá, Santa Catarina, Brasil. Dos litotipos, destacam-se as exposições de rochas metamáficas e metaultramáficas, ocorrentes em ambas regiões. Em Itapema também foram investigados corpos de leucogranitos peraluminosos e na região da cidade de Botuverá foram investigados diques de diabásio e lamprófiro espessartítico. A análise das condições de geração e das fontes dos eventos magmáticos responsáveis pela geração destas rochas foi fundamental para a caracterização e avaliação do significado tectônico destas unidades no CMB, que foram posicionadas durante os períodos pré, sin e pós colisionais de evolução deste. A foliação regional do complexo é representada por uma S2 de baixo ângulo na região de Itapema e por uma superfície de mais alto ângulo na região de Botuverá, basculada por atuação da fase D3. Dados de geotermometria Hb-Pl indicam que a foliação principal dos xistos máficos foi gerada em condições da transição entre as fácies xistos verdes e anfibolito inferior. O magmatismo pré-orogênico do Complexo Metamórfico Brusque é constituído por lentes de rochas máficas-ultramáficas, produtos do metamorfismo de basaltos, gabros, rochas cumuláticas relacionadas e sedimentos vulcanogênicos. Estas rochas possuem afinidade toleítica e um elevado teor de ETR leves e elementos LILE. A análise de razões de elementos incompatíveis, a disposição dos corpos ígneos intercalados aos metassedimentos e a ausência de crosta oceânica sugerem que foram posicionados em ambiente tipo intra-placa continental, síncronos a sedimentação da bacia. Os valores iniciais de εNd entre -2.96 e 5.05 das rochas metavulcânicas de Itapema e entre -0.14 e -6.97 das rochas de Botuverá indicam a participação de crosta paleoproterozóica na gênese destes magmas. Os valores em geral elevados de 87Sr/86Sr justificam o envolvimento da crosta continental, e os valores mais altos encontrados em Botuverá, destacam o maior envolvimento deste componente na região. O magmatismo sin tectônico está representado por corpos de leucogranitos peraluminosos que mostram posicionamento concordante com a foliação S2. Os parâmetros composicionais destas rochas caracterizados pelas baixas razões K2O/Na2O, CaO/Na2O e LaN/YbN, os baixos teores de Rb, Sr, Zr, Y, Yb e Lu, são consistentes com uma evolução associada com magmas gerados a partir da fusão parcial de rochas crustais de composição pelíticas ricas em quartzo, com participação restrita de processos de diferenciação. Na região de Botuverá a ocorrência de diques de lamprófiros e diabásios que cortam as unidades metamórficas indica que seu posicionamento é pós-colisional. Geoquimicamente possuem afinidade entre as séries toleítica e shonshonítica. O padrão de distribuição dos elementos traços e as razões Th/Yb e Ta/Yb indicam que a extração dos diabásios ocorreu a partir de uma fonte mantélica enriquecida, com presença de rutilo e granada no resíduo e fortemente contaminada por crosta. Estas características são semelhantes às encontradas em rochas vulcânicas básicas pós-colisionais no sul do Brasil. Os dispersos valores de єNd(618) para os termos básicos, variando entre -13.74 e +5.52 destacam a heterogeneidade da fonte e reforçam a importância do componente crustal na geração destas rochas. Foi obtida uma idade concordante de 618 ±8.7 Ma (LA-ICP-MS) pelo método U-Pb em zircão, balizando a idade dos primeiros processos magmáticos pós-colisionais da orogênese brasiliana para a região de Botuverá.
This work objective the characterization of the petrology, geochemistry, geochronology and metamorphism of ortoderivate rocks that belong to Brusque Metamorphic Complex BMC) in two regions: Itapema and Botuverá, Santa Catarina, Brazil. Within these, good expositions of mafic and metaultramafic rocks occur in both regions. In Itapema, bodies of peraluminous leucogranites were also investigated. Around Botuverá were investigated diabase dikes and lamprophyres. The analysis of the conditions of generation and sources of magmatic events responsible for the development of these rocks was essential for the characterization and assessment of the significance of these tectonic units in the BMC, and it were placed during the pre-, syn-and post-collisional period of it’s evolution. The regional foliation of the complex is represented by a low angle S2 surface in Itapema region and a higher angle foliation in the region of Botuverá, folded by actuation of the D3 event. Petrography and Hb-Pl geothermometry data indicate that the main foliation of the mafic schists was generated in conditions between the transition of greenschist and lower amphibolite facies. The pre-orogenic magmatism of the Brusque Metamorphic Complex consists of lenses of mafic-ultramafic, products from the metamorphism of basalts, gabbros, related cumulate rocks and volcanogenic sediments. These rocks have a tholeiitic affinity and high contents of LREE and LILE elements. The analysis of incompatible elements ratios, the position of igneous bodies intercalated with the metasediments and the absence of oceanic crust suggest that the basalts were placed in an intra-continental plate environment, synchronous with sedimentation of the basin. The initial εNd values between -2.96 and 5.05 for the metavolcanics of Itapema and between -0.14 and -6.97 for the rocks of Botuverá indicate the involvement of Paleoproterozoic crust on the genesis of these magmas. The generally high 87Sr/86Sr values justify the involvement of crust, and the highest values found in Botuverá, highlight the greater involvement of this component in the region. Syn tectonic magmatism is represented by bodies of peraluminous leucogranite showing emplacement concordant to S2 foliation. Compositional parameters of these rocks characterized by low ratios K2O/Na2O, CaO/Na2O and LaN / YbN, low levels of Rb, Sr, Zr, Y, Yb and Lu, are consistent with magmas generated from partial melting of pelitic rocks, with limited participation of differentiation processes. In the region of Botuverá the occurrence of diabase dykes and lamprophyres cutting the regional metamorphic units indicates that its position is post-collisional. Geochemically show affinity between the tholeiitic and shonshonitic series. The distribution pattern of trace elements and the Th/Yb for Ta/Yb ratios indicate that extraction of diabase occur from an enriched mantle source, with the presence of rutile and garnet in the residue and heavily contaminated by crust. These characteristics are similar to those found in rocks post-collisional basaltic volcanic in south Brazil. The scattered values of єNd (618) in basic terms, ranging between -13.74 and +5.52 highlight the heterogeneity of mantle supply and reinforce the importance of crustal component in the generation of these rocks. A concordant age of 618 ± 8.7 Ma by U-Pb (LA-ICP-MS) zircon method were obtained, marking a early magmatic processes of post-collisional Brasiliano orogeny in the region of Botuverá.
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Chaudhuri, Manis [Verfasser]. "Electric potential and ion drag force in highly collisional complex plasma / vorgelegt von Manis Chaudhuri." 2008. http://d-nb.info/991269748/34.

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Abel, Martin Andreas. "Collision-induced absorption in the rototranslational band of H2-H2 and in the fundamental band and first and second overtone of H2 in dense hydrogen gas." Thesis, 2009. http://hdl.handle.net/2152/ETD-UT-2009-08-235.

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The absorption due to pairs of H2 molecules is an important opacity source in the atmospheres of various types of planets and cool stars, such as late stars, low-mass stars, brown dwarfs, certain white dwarfs, etc., and therefore of special astronomical interest [13]. The emission spectra of cool white dwarf stars differ signicantly from the expected blackbody spectra of the cores, due to collision-induced absorption by collisional complexes of hydrogen and helium in the stellar atmospheres. In order to model the radiative processes in these atmospheres, which have temperatures of several thousand kelvin, one needs accurate knowledge of the induced dipole and potential energy surfaces of collisional complexes such as H2-H2. These come from quantum-chemical calculations with the H2 bonds stretched or compressed far from equilibrium length. Since no measurements of the collision-induced absorption for these high temperatures exist, one has to undertake ab initio calculations which take into account the high vibrational excitations of the hydrogen molecules. However, before one attempts to proceed to higher temperatures where no laboratory measurements exist it is good to know that the formalism is correct and reproduces the results at temperatures where measurements exist. Therefore, in order to make sure that the calculations are reliable one compares the results of the calculations with existing laboratory measurements where possible before proceeding to higher temperatures. Molecular hydrogen has always played a special role in the collision-induced spectroscopies. The rotational transition frequencies of H2 are widely separated so that translational, rotational and vibrational induced spectral bands can be studied separately. Moreover, the H2 molecule has a small anisotropy of the intermolecular interactions which may often be ignored in first order approximations. In general hydrogen gas is a mixture of para- and ortho-hydrogen. Para-hydrogen at sufficiently low temperature is not rotationally excited and is therefore an isotropic system. However, the anisotropy can be turned on and of by raising and lowering the temperature, because the ratio of para- to ortho-hydrogen depends on the temperature. What is even more, roughly 90% of all the known matter in the universe is hydrogen, in the ionized, atomic or molecular states, which makes hydrogen one of the most important species in astrophysics. The hydrogen molecule is non-polar, and some of the most important spectra in the near and far infrared and microwave region are collision-induced, due to H2-H2 complexes. At the temperature of 297.5K measurements of the collision-induced absorption spectra of H2-H2 gas are reported in the frequency range from 1900 to 2260cm^{-1} [9]. The gas densities for these measurements ranged from 51 to 610 amagat. These measurements were compared with ab initio calculations of the absorption. For these calculations the isotropic potential approximation was used. In contrast to previous ab initio calculations [9] agreement between calculations and measured spectra is now observed over the full frequency range considered. A major difference to the earlier calculations is that in this work new dipole and potential energy surfaces were used. Furthermore, measurements exist of the fundamental band and first and second overtone of H2 in dense hydrogen gas. They have been compared with ab initio calculations based on the new method. Over the full range of frequencies considered the agreement between calculations and measurements is remarkable. This work demonstrates that the new method is capable of reproducing the measured spectra where those exist with high accuracy, and predicts reliable opacities where no laboratory measurements exist.
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Book chapters on the topic "Complexe collisionnel"

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Solov’yov, Ilia A., Andrey V. Korol, and Andrey V. Solov’yov. "Collisional Processes Involving MBN Systems." In Multiscale Modeling of Complex Molecular Structure and Dynamics with MBN Explorer, 323–71. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56087-8_9.

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Pfeilsticker, Klaus, H. Bösch, R. Fitzenberger, and Claude Camy-Peyret. "Spectroscopic and Thermochemical Information on the O2−O2 Collisional Complex Inferred From Atmospheric Uv/Visible O4 Absorption Band Profile Measurements." In Weakly Interacting Molecular Pairs: Unconventional Absorbers of Radiation in the Atmosphere, 273–84. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0025-3_24.

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Moszynski, Robert, Tino G. A. Heijmen, Paul E. S. Wormer, and Ad van der Avoird. "Theoretical Modeling of Spectra and Collisional Processes of Weakly Interacting Complexes." In Advances in Quantum Chemistry, 119–40. Elsevier, 1997. http://dx.doi.org/10.1016/s0065-3276(08)60211-7.

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Kusky, Timothy M., Adam Glass, and Robert Tucker. "Structure, Cr-chemistry, and age of the Border Ranges Ultramafic-Mafic Complex: A suprasubduction zone ophiolite complex." In Special Paper 431: Tectonic Growth of a Collisional Continental Margin: Crustal Evolution of Southern Alaska, 207–25. Geological Society of America, 2007. http://dx.doi.org/10.1130/2007.2431(09).

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Amato, Jeffrey M., Matthew J. Bogar, George E. Gehrels, G. Lang Farmer, and William C. McIntosh. "The Tlikakila complex in southern Alaska: A suprasubduction-zone ophiolite between the Wrangellia Composite terrane and North America." In Special Paper 431: Tectonic Growth of a Collisional Continental Margin: Crustal Evolution of Southern Alaska, 227–52. Geological Society of America, 2007. http://dx.doi.org/10.1130/2007.2431(10).

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Mather, Anne. "Tectonic Setting and Landscape Development." In The Physical Geography of the Mediterranean. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780199268030.003.0011.

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The Mediterranean is the westernmost part of the global-scale Alpine-Himalayan orogenic belt which stretches from Spain to New Zealand. The landscapes of the region have a long and complex history that includes both horizontal and vertical crustal movements and the creation and destruction of oceans. This began with the break up of the super-continent Pangea around 250 Ma, which generated the Tethys Ocean—the forerunner to the present-day Mediterranean Sea. Collision of the African and European tectonic plates over the last 30 Ma led to the destruction of the Tethys Ocean, although a few remnants of its geology are preserved within the eastern Mediterranean. It is the collision of Africa and Eurasia, and the associated tectonics that have been largely responsible for generating the Mediterranean Sea, its subsequent history, and the landscapes that surround it. This collisional history progressively reduced the connectivity of the Mediterranean Sea with surrounding marine bodies by closing and restricting marine gateways. During the Miocene, for example, the Mediterranean basin became completely isolated from surrounding marine bodies in what is known as the ‘Messinian Salinity Crisis’. This period saw major changes to the regional water balance leading to evaporation and draw-down of the Mediterranean Sea. This had profound impacts on all aspects of the physical geography of the region including the climatology, biogeography, and geomorphology and its legacy can be seen across the region today. The more recent Quaternary geodynamics of the Mediterranean have generated an area which includes a complex mixture of zones of plate subduction of various ages and stages (Figure 1.1b). The modern Mediterranean includes zones of active subduction associated with volcanic activity—such as the Calabrian arc—and older zones of now quiescent subduction such as the Betic-Rif arc. There is a wide range of seismic activity associated with these regions from deep (600 km) to shallow (<50 km) and ranging in magnitude up to 8.0Mw (earthquake moment magnitude; a quantitative and physically based scale for measuring earthquakes).
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Guo, P., and V. V. Ivashkin. "An Accuracy Estimation of Determining the Collisional Orbit of the Dangerous Asteroid Apophis by the Optical Measurements from the “Nebosvod” complex." In Some aspects of contemporary problems of mechanics and computer science, 212–26. Space Research Institute, 2018. http://dx.doi.org/10.21046/aspects-2018-212-226.

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Pin, C., J. L. Paquette, J. F. Santos Zalduegui, and J. I. Gil Ibarguchi. "Early Devonian suprasubduction-zone ophiolite related to incipient collisional processes in the Western Variscan Belt: The Sierra de Careón unit, Ordenes Complex, Galicia." In Variscan-Appalachian dynamics: The building of the late Paleozoic basement. Geological Society of America, 2002. http://dx.doi.org/10.1130/0-8137-2364-7.57.

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Stewart, Iain, and Christophe Morhange. "Coastal Geomorphology and Sea-Level Change." In The Physical Geography of the Mediterranean. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780199268030.003.0025.

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The intricate shores of the Mediterranean Sea twist and turn for some 46,000 km, with three-quarters of their convoluted length confined to only four countries— Italy, Croatia, Greece, and Turkey. Just over half the coast is rocky, much of it limestone, with the remainder encompassing almost every type of littoral environment (exceptions being coral reefs and mangrove wetlands). Such littoral diversity has long made the seaboard of southern Europe, the Levant, and North Africa a fruitful natural laboratory for studying coastal geomorphology and sea-level change. The virtually enclosed sea ensures that wave processes are generally modest and the tidal range is limited (often less than half a metre), a combination that permits observational evidence of many modern shoreline features to be related precisely to mean sea level. Consequently, relative shifts in the position of now relict coastal features can be used to track the rhythms of relative sea-level change and shoreline evolution. Such rhythms have a bearing on several aspects beyond the physical geography of the Mediterranean basin: they inform archaeological reconstructions of the past settlement and exploitation of a coastal zone that has been an important focus of human activity since Palaeolithic times; they provide testing and fine-tuning for geophysical, geodynamic, and palaeoclimatic models for the region; and they set the backdrop to contemporary societal issues, such as future sea-level rise and coastline adjustments to mass tourism, which threaten the long-term sustainability of the Mediterranean littoral. In this chapter, we review these diverse facets of the Mediterranean coastal realm to provide a synthesis of how these shores have evolved into their present-day appearance. The Mediterranean occupies the convergence zone between two major tectonic plates, Africa and Europe, with a third, Arabia, pressing from the east. Caught within the collisional vice of these great plates are several minor plates and crustal blocks, most notably Anatolia and Apulia. The result is a complex network of plate tectonic structures that define the general configuration of the seaboard. In particular, two major subduction systems partition the Mediterranean basin into a patchwork of minor basins and subsidiary seas (Krijgsman 2002; Chapter 1).
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Conference papers on the topic "Complexe collisionnel"

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Khrapak, S. A., José Tito Mendonça, David P. Resendes, and Padma K. Shukla. "Collisional Effects in Complex (Dusty) Plasmas." In MULTIFACETS OF DUSTRY PLASMAS: Fifth International Conference on the Physics of Dusty Plasmas. AIP, 2008. http://dx.doi.org/10.1063/1.2996725.

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Bronin, S. Y., L. G. D'yachkov, A. G. Khrapak, S. V. Vladimirov, Vladimir Yu Nosenko, Padma K. Shukla, Markus H. Thoma, and Hubertus M. Thomas. "Grain Charging and Shielding in Collisional Plasmas." In DUSTY∕COMPLEX PLASMAS: BASIC AND INTERDISCIPLINARY RESEARCH: Sixth International Conference on the Physics of Dusty Plasmas. AIP, 2011. http://dx.doi.org/10.1063/1.3659793.

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Reynolds, J. M., D. López-Bruna, J. Guasp, J. L. Velasco, A. Tarancón, Jesús Clemente-Gallardo, Pierpaolo Bruscolini, Francisco Castejón, Pablo Echenique, and José Félix Sáenz-Lorenzo. "A new code for collisional drift kinetic equation solving." In LARGE SCALE SIMULATIONS OF COMPLEX SYSTEMS, CONDENSED MATTER AND FUSION PLASMA: Proceedings of the BIFI2008 International Conference: Large Scale Simulations of Complex Systems, Condensed Matter and Fusion Plasma. AIP, 2008. http://dx.doi.org/10.1063/1.3033362.

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Zamankhan, Piroz. "Complex Flow Dynamics in Dense Granular Flows: Part I — Experimentation; Part II — Simulations." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77083.

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PART I: By applying a methodology useful for analysis of complex fluids based on a synergistic combination of experiments, computer simulations and theoretical investigation, a model was built to investigate the fluid dynamics of granular flows in an intermediate regime where both collisional and frictional interactions may affect the flow behavior. In Part I, the viscoelastic behavior of nearly identical sized glass balls during a collision, have been studied experimentally using a modified Newton’s Cradle device. Analyzing the results of the measurements, by employing a numerical model based on finite element methods, the viscous damping coefficient was determined for the glass balls. Power law dependence was found for the restitution coefficient on the impact velocity. In order to obtain detailed information about the interparticle interactions in dense granular flows, a simplified model for collisions between particles of a granular material was proposed to be of use in molecular dynamic simulations, discussed in Part II. PART II: By applying a methodology useful for analysis of complex fluids based on a synergistic combination of experiments, computer simulations, and theoretical investigation, a model was built to investigate the fluid dynamics of granular flows in an intermediate regime, where both collisional and frictional interactions may affect the flow behavior. In Part I, experiments were described using a modified Newton’s Cradle device to obtain values for the viscous damping coefficient, which are scarce in the literature. In this paper, molecular dynamic simulations were performed using the simplified model for collisions between particles, developed in Part I, to obtain detailed information about the interparticle interactions. This information was used to develop a continuum model for granular flows, accounting for both collisional and frictional interactions between particles. To validate the continuum model, simulations were performed for the specific case of granular flow in a rapidly spinning bucket. The model was able to reproduce experimentally observed flow phenomena in buckets spinning at high frequencies (higher than 50 Hz), such as the transition from a cusp to a depression in the center of the bucket with increasing rotation rate. This agreement suggests that the model may be a useful tool for the prediction of dense granular flows in industrial applications, but highlights the need for further experimental investigation of granular flows in order to refine the model.
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Chaudhuri, Manis, Sergey A. Khrapak, Gregor E. Morfill, Vladimir Yu Nosenko, Padma K. Shukla, Markus H. Thoma, and Hubertus M. Thomas. "Experimental determination of particle charge in highly collisional plasma." In DUSTY∕COMPLEX PLASMAS: BASIC AND INTERDISCIPLINARY RESEARCH: Sixth International Conference on the Physics of Dusty Plasmas. AIP, 2011. http://dx.doi.org/10.1063/1.3659794.

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Haakonsen, Christian Bernt, Ian H. Hutchinson, Vladimir Yu Nosenko, Padma K. Shukla, Markus H. Thoma, and Hubertus M. Thomas. "Ion Collection by a Sphere in a Drifting Collisional Plasma." In DUSTY∕COMPLEX PLASMAS: BASIC AND INTERDISCIPLINARY RESEARCH: Sixth International Conference on the Physics of Dusty Plasmas. AIP, 2011. http://dx.doi.org/10.1063/1.3659797.

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Zalesskaya, G. A., D. L. Yakovlev, E. G. Sambor, and D. I. Baranovsky. "Collisional relaxation of vibrationally excited complex molecules following laser excitation: effect of supercollisions." In ICONO '98: Laser Spectroscopy and Optical Diagnostics--Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, edited by Andrey Y. Chikishev, Victor N. Zadkov, and Alexei M. Zheltikov. SPIE, 1999. http://dx.doi.org/10.1117/12.340023.

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Gustafsson, Magnus. "Infrared absorption spectra of H[sub 2]–He collisional complexes: The effect of the anisotropy of the interaction potential." In The 15th international conference on spectral line shapes. AIP, 2001. http://dx.doi.org/10.1063/1.1370675.

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Cutts, Jamie, and Matthijs A. Smit. "SLOW BURIAL OF CONTINENTAL CRUST IN COLLISIONAL OROGENS; INSIGHTS FROM SPATIALLY-RESOLVED LU-HF GARNET CHRONOLOGY IN THE WESTERN GNEISS COMPLEX, NORWAY." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306899.

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Wang, Y., and C. Shu. "Numerical Investigation on Head-On Collisions of Binary Micro-Droplets by an Improved Multiphase Lattice Boltzmann Flux Solver." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6533.

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Head-on collisions of binary micro-droplets are of great interest in both academic research and engineering applications. Numerical simulation of this problem is challenging due to complex interfacial changes and large density ratio between different fluids. In this work, the recently proposed lattice Boltzmann flux solver (LBFS) is applied to study this problem. The LBFS is a finite volume method for the direct update of macroscopic flow variables at cell centers. The fluxes of the LBFS are reconstructed at each cell interface through lattice moments of density distribution functions (DDFs). As compared with conventional multiphase lattice Boltzmann method, the LBFS can be easily applied to study complex multiphase flows with large density ratio. In addition, external forces can be implemented more conveniently and the tie-up between the time step and mesh spacing is also removed. Moreover, it can deal with complex boundary conditions directly as those do in the conventional Navier-Stokes solvers. At first, the reliability of the LBFS is validated by simulating a micro-droplet impacting on a dry surface at density ratio 832 (air to water). The obtained result agrees well with experimental measurement. After that, numerical simulations of head-on collisions of two micro droplets are carried out to examine different collisional behaviors in a wide range of Reynolds numbers and Weber numbers of 100 ≤ Re ≤ 2000 and 10 ≤ We ≤ 500. A phase diagram parameterized by these two control parameters is obtained to classify the outcomes of these collisions. It is shown that, at low Reynolds number (Re=100), two droplets will be coalescent into a bigger one for all considered Weber numbers. With the increase of the Reynolds number, separation of the collision into multiple droplets appears and the critical Weber number for separation is decreased. When the Reynolds number is sufficiently high, the critical Weber number for separation is between 20 and 25.
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