Relevant bibliographies by topics / Evaporation mechanism

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Academic literature on the topic 'Evaporation mechanism'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Evaporation mechanism"

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David, S., Khellil Sefiane, and Lounes Tadrist. "Experimental Investigation of the Effect of the Ambient Gas on Evaporating Sessile Drops." Defect and Diffusion Forum 258-260 (October 2006): 461–68. http://dx.doi.org/10.4028/www.scientific.net/ddf.258-260.461.

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This paper presents the results of an experimental study of evaporating sessile drops in a controlled environment. The experimental setup allowed the investigation of the evaporation rate of sessile drops under reduced pressure (40 to 1000 mbar) and various ambient gases. Sessile drops of initial volume 2.5μL are deposited on substrates and left to evaporate in a controlled atmosphere. The effect of reducing pressure on the evaporation rate as well as changing the ambient gas is studied. Three different gases are used; namely Helium, Nitrogen and Carbon Dioxide. The role of vapour diffusion as a limiting mechanism for evaporation is studied. It is found that in all cases the evaporation rate is limited by the mass diffusion in the ambient gas provided that interfacial conditions are properly accounted for. This includes important evaporative cooling observed at higher evaporation rates and lower substrate thermal conductivity.
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Tardif, Robert, and Roy M. Rasmussen. "Evaporation of Nonequilibrium Raindrops as a Fog Formation Mechanism." Journal of the Atmospheric Sciences 67, no. 2 (February 1, 2010): 345–64. http://dx.doi.org/10.1175/2009jas3149.1.

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Abstract To gain insights into the poorly understood phenomenon of precipitation fog, this study assesses the evaporation of freely falling drops departing from equilibrium as a possible contributing factor to fog formation in rainy conditions. The study is based on simulations performed with a microphysical column model describing the evolution of the temperature and mass of evaporating raindrops within a Lagrangian reference frame. Equilibrium defines a state where the latent heat loss of an evaporating drop is balanced by the sensible heat flux from the ambient air, hence defining a steady-state drop temperature. Model results show that the assumption of equilibrium leads to small but significant errors in calculated precipitation evaporation rates for drops falling in continuously varying ambient near-saturated or saturated conditions. Departure from equilibrium depends on the magnitude of the vertical gradients of the ambient temperature and moisture as well as the drop-size-dependent terminal velocity. Contrasting patterns of behavior occur depending on the stratification of the atmosphere. Raindrops falling in inversion layers remain warmer than the equilibrium temperature and lead to enhanced moistening, with supersaturation achieved when evaporation proceeds in saturated inversions. Dehydration occurs in layers with temperature and water vapor increasing with height due to the vapor flux from the environment to the colder drops. These contrasts are not represented when equilibrium is assumed. The role of nonequilibrium raindrop evaporation in fog occurrences is further emphasized with simulations of a case study characterized by fog forming under light rain falling in a developing frontal inversion. Good agreement is obtained between fog water content observations and simulations representing only the effects of rainfall evaporation. This study demonstrates the need to take into account the nonequilibrium state of falling raindrops for a proper representation of an important mechanism contributing to precipitation fog occurrences.
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Zheng, Lei, Bo Wang, Fangliang Meng, Minqing Wang, Ye Meng, and Bing Yun. "Quantification of evaporation parameter and determination of evaporation mechanism." Journal of Alloys and Compounds 817 (March 2020): 152699. http://dx.doi.org/10.1016/j.jallcom.2019.152699.

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Ma, Hong Yun, Zhen Hong Zhao, Dong Wang, Jun Zhang, Li Guo, and Zhi Jun Li. "Research Progress of Fractionation Mechanism of Stable Hydrogen and Oxygen Isotope during Water Body Evaporation." Advanced Materials Research 550-553 (July 2012): 2588–92. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2588.

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Evaporation is the most significant process that affects the isotopic transport of surface water. The study of mechanisms and modeling of the evaporation process has a very important practical significance in improving the isotopic analysis method. This paper reviews the international development of the mechanism of hydrogen and oxygen stable isotopic fractionation and model. It indicates that as the most ideal tracers of hydrologic cycle, stable hydrogen and oxygen isotopes have their unique and irreplaceable functions. However, field experiments of evaporation and further research are limited by the complexities of kinetic flow in the atmosphere and observation technique. Modeling and experiments are commonly based on the assumption that evaporating water is well-mixed, and isotopic stratification in liquid is not considered by most laboratories. While it dose affect. Flow disturbance in the atmosphere is the most uncertain factor for isotopic fractionation in the process of evaporation. The modeling example shows isotopic evaporation line of natural water can be simulated properly while detailed simulations are limited by the lake of observational data of isotopic diffusion processes in both air phase and liquid phase.
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Jacobi, Anthony M., and John R. Thome. "Heat Transfer Model for Evaporation of Elongated Bubble Flows in Microchannels." Journal of Heat Transfer 124, no. 6 (December 1, 2002): 1131–36. http://dx.doi.org/10.1115/1.1517274.

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Recent experimental studies of evaporation in microchannels have shown that local flow-boiling coefficients are almost independent of vapor quality, weakly dependent on mass flux, moderately dependent on evaporating pressure, and strongly dependent on heat flux. In a conventional (macrochannel) geometry, such trends suggest nucleate boiling as the dominant heat transfer mechanism. In this paper, we put forward a simple new heat transfer model based on the hypothesis that thin-film evaporation into elongated bubbles is the important heat transfer mechanism in these flows. The new model predicts the above trends and quantitatively predicts flow-boiling coefficients for experimental data with several fluids. The success of this new model supports the idea that thin-film evaporation into elongated bubbles is the important heat transfer mechanism in microchannel evaporation. The model provides a new tool for the study of such flows, assists in understanding the heat transfer behavior, and provides a framework for predicting heat transfer.
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Yilbaş, Bekir Sami, and Ahmet Z. Şahin. "Laser heating mechanism including evaporation process." International Communications in Heat and Mass Transfer 21, no. 4 (July 1994): 509–18. http://dx.doi.org/10.1016/0735-1933(94)90050-7.

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Arieli, Yehuda, Neomi Feinstein, Pnina Raber, Michal Horowitz, and Jacob Marder. "Heat stress induces ultrastructural changes in cutaneous capillary wall of heat-acclimated rock pigeon." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 277, no. 4 (October 1, 1999): R967—R974. http://dx.doi.org/10.1152/ajpregu.1999.277.4.r967.

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In heat-acclimated rock pigeons, cutaneous water evaporation is the major cooling mechanism when exposed at rest to an extremely hot environment of 50–60°C. This evaporative pathway is also activated in room temperature by a β-adrenergic antagonist (propranolol) or an α-adrenergic agonist (clonidine) and inhibited by a β-adrenergic agonist (isoproterenol). In contrast, neither heat exposure nor drug administration activates cutaneous evaporation in cold-acclimated pigeons. To elucidate the mechanisms underlying this phenomenon, we studied the role of the ultrastructure and permeability of the cutaneous vasculature. During both heat stress and the administration of propranolol and clonidine, we observed increased capillary fenestration and endothelial gaps. Similarly, propranolol increased the extravasation of Evans blue-labeled albumin in the skin tissue. We concluded that heat acclimation reinforces a mechanism by which the activation of adrenergic signal transduction pathways alters microvessel permeability during heat stress. Consequently the flux of plasma proteins and water into the interstitial space is accelerated, providing an interstitial source of water for sustained cutaneous evaporative cooling.
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Meng, Wei, Xihuan Sun, Juanjuan Ma, Xianghong Guo, and Lijian Zheng. "Evaporation and Soil Surface Resistance of the Water Storage Pit Irrigation Trees in the Loess Plateau." Water 11, no. 4 (March 28, 2019): 648. http://dx.doi.org/10.3390/w11040648.

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As an important step for formulating a water-saving agricultural strategy, it is essential to make quantitative calculations for orchard soil evaporation and confirm its inner mechanism, so as to reduce ineffective water consumption and improve the utilization efficiency of water resources. To reveal the effect of water storage pits under water storage pit irrigation conditions in orchard soil evaporation, micro-lysimeters were used to measure the soil evaporation in two different forms (soil surface evaporation and pit wall evaporation) under diverse irrigation systems using water storage pit irrigation in the apple growth period of 2018. To calculate the orchard soil evaporation of water storage pit irrigation, the pit irrigation coefficient was introduced and a model was constructed. To illustrate the inner mechanism of orchard soil evaporation, the soil surface resistance under water storage pit irrigation conditions was analyzed and calculated quantitatively. The results show that: (1) introducing the pit irrigation coefficient can boost the calculation precision of the orchard soil evaporation under water storage pit irrigation conditions; (2) when applying the soil evaporation of the water storage pit irrigation model for calculation of the orchard soil evaporation, R 2 can reach 0.92; and (3) the mechanisms of the two orchard soil evaporation forms under water storage pit irrigation are very different. When soil surface evaporation and pit wall evaporation were calculated by the soil surface resistance of water storage pit irrigation model, R 2 values were 0.95 and 0.96, respectively.
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Strauven, H., A. Stesmans, J. Winters, J. Spinnewijn, and O. B. Verbeke. "Hydrogen incorporation mechanisms in the preparation of a-Si:H by ion bombardment-activated reactive evaporation." Journal of Materials Research 3, no. 2 (April 1988): 335–43. http://dx.doi.org/10.1557/jmr.1988.0335.

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Here a-Si:H is prepared by ion bombardment-activated reactive evaporation of Si in a H2O residual gas pressure ranging from 10−9 to 10−7 Torr. The Si+ ions (2.7keV) are bombarding the substrate and the walls during evaporation. Two hydrogen incorporation mechanisms are revealed by H evolution experiments, depending on the H2O residual gas pressure during evaporation. In the first mechanism H is sputtered from the walls of the system by the ion bombardment; this mechanism contributes 10 at. % to the hydrogen content. In a second mechanism Si+ bombardment on the growing layer injects H from H2O molecules adsorbed on the film surface; at least 5 at. % H is incorporated by this process. The second mechanism has a remarkable influence on the microstructure as revealed from the electrical conductivity, electron spin resonance, and infrared transmission. Indeed, Si+ bombardment-induced injection of H changes the conductivity type from variable range hopping to an activated behavior, while the dangling bond density remains low (< 1018 cm −3). The growth of [SiH2]n bundles, observed by the resonance frequency and absorption strength of the stretch mode of the Si–H dipole, is also a consequence of the H injection mechanism. It is concluded that the properties of the a-Si:H, prepared by ion bombardment-activated reactive evaporation, are explained by a microstructure, dependent on the specific hydrogen incorporation mechanism.
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Abal, G., A. Romanelli, A. C. Sicardi-Schifino, R. Siri, and R. Donangelo. "Evaporation effects in the one-body dissipation mechanism." Nuclear Physics A 683, no. 1-4 (February 2001): 279–86. http://dx.doi.org/10.1016/s0375-9474(00)00475-9.

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Dissertations / Theses on the topic "Evaporation mechanism"

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Kimball, Samuel H. "Evaporation is the Primary Mechanism of Tear Film Thinning." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243957487.

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Benavides, José 1972. "The evaporation and aerosol formation mechanism of solutes in molten metals." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43541.

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Simon, Marek Sebastian [Verfasser]. "On the Mechanism of Evaporation-Determined Arc-Cathode Coupling in GMA Welding / Marek Sebastian Simon." Düren : Shaker, 2021. http://d-nb.info/1236834348/34.

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Managlia, Maria Vittoria. "Study of 18O+12,13C fusion-evaporation reactions with the GARFIELD array." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23932/.

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Non statistical effects in the emission of light charged particles from fusion-evaporation nuclear reactions are known for light and medium mass nuclei. Cases previously reported by the NUCL-EX collaboration show discrepancies between experimental data and statistical calculations in decay channels with even residues, possibly due to alpha clusterization. This thesis is focused on the analysis of an experimental campaign carried out at the Legnaro National Laboratories with the GARFIELD+RCo setup to further investigate these topics. The studied systems are: 18O+13C at 112.5 MeV and 18O+12C at 122 and 300 MeV. This thesis work covers the various steps of a typical nuclear experiment conducted with the GARFIELD array. After data taking, preliminary experimental data have been reconstructed through data cleaning, calibration and particle identification. Being the experimental data reconstruction still ongoing, no final experimental reconstructed data have been reported. Nonetheless, simulated data by Monte Carlo statistical decay code have been analysed to investigate the evolution of fusion-evaporation processes from a statistical point of view. The analysis has been focused on the study of global observables like total charge and multiplicity and on single-particle observables like energy spectra and angular distributions. GEMINI++ statistical decay code simulating the fragment emission from a hot source has been considered in the study of the 122 MeV reaction and for a direct comparison of the three reactions. Finally, the HFl statistical code conceived by the collaboration for the light nuclei decay and containing the details of the known excited levels has been compared with GEMINI++. This thesis work paves the way for further studies on the reconstructed data to highlight possible agreements with theoretical models.
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Simon, Marek Sebastian [Verfasser], Uwe [Akademischer Betreuer] Reisgen, and Dirk [Akademischer Betreuer] Uhrlandt. "On the mechanism of evaporation-determined arc-cathode coupling in GMA welding / Marek Sebastian Simon ; Uwe Reisgen, Dirk Uhrlandt." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1238523714/34.

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Song, Weikang. "Experimental investigation of water evaporation from sand and clay using an environmental chamber." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1047/document.

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Il est bien connu que l'évaporation d'eau joue un rôle essentiel dans l'interaction entre le sol et l'atmosphère. Pendant le processus d'évaporation, le comportement thermo-hydro-mécanique des sols change, engendrant ainsi des problèmes préoccupants. Ceci peut concerner différents domaines comme l'agronomie, l'hydrologie, la science des sols, la géotechnique, etc. Par conséquent, il est essentiel d'étudier les mécanismes d'évaporation de façon approfondie. Cette étude porte sur les mécanismes d'évaporation dans des conditions atmosphériques contrôlées. Le sable de Fontainebleau et l'argile d'Hércourt utilisée pour la construction du remblai expérimental dans le cadre du projet ANR TerDOUEST (Terrassements Durables - Ouvrages en Sols Traités, 2008-2012) ont été étudiés à cet effet. Une chambre environnementale (900 mm de haut, 800 mm de large et 1000 mm de long) équipée de différents capteurs a d'abord été développée, permettant un suivi complet des paramètres concernant l'atmosphère et le sol au cours d'évaporation. Quatre essais expérimentaux ont été réalisés sur le sable de Fontainebleau compacté à une densité sèche de 1,70 Mg/m3, avec une nappe phréatique constante au fond de l'échantillon, et sous différentes conditions atmosphériques (différentes valeurs de l'humidité relative de l'air, de la température et du débit d'air). La pertinence du système a été mise en évidence par la bonne qualité des résultats. La température de l'air à l'intérieur de la chambre a été trouvée affectée par la température du tube de chauffage, le débit d'air et l'évaporation d'eau; la température du sol est fortement affectée par les conditions atmosphériques et l'état d'avancement de l'évaporation ; l'humidité relative dans la chambre diminue au cours du temps et son évolution peut être considérée comme un indicateur du processus d' évaporation ; la teneur en eau volumique dans la zone proche de la surface est fortement influencée par le processus d'évaporation et présente une relation linéaire avec la profondeur ; la succion du sol diminue avec la profondeur et augmente au fil du temps ; le taux d'évaporation est fortement affecté par les conditions de l'air en particulier dans la phase initiale de vitesse d'évaporation constante. Après les essais sur le sable de Fontainebleau, l'échantillon de l'argile d'Hércourt compactée à une densité sèche de 1,40 Mg/m3 a été soumis à une infiltration d'eau afin d'étudier ses propriétés hydrauliques. Pour obtenir un meilleur aperçu du mécanisme d'évaporation pour l'argile, deux essais d'évaporation sur l'argile d'Hércourt compactée avec une nappe phréatique constante au fond de l'échantillon ont été effectuées sous des conditions atmosphériques contrôlées. Les résultats permettent de comprendre les mécanismes d'évaporation en cas de fissuration due à la dessiccation. En outre, afin d'étudier les mécanismes d'évaporation potentiels, des essais avec une couche d'eau libre ont été également réalisés en faisant varier la vitesse du vent et la température de l'air. L'initiation et la propagation de fissures de dessiccation pendant le processus d'évaporation et son effet sur l'évaporation ont également été étudiés par la technique de traitement d'image. En termes de modélisation, le taux d'évaporation potentiel a été modélisé à travers l'évaluation des modèles existants et des modèles combinés. Il apparait que le modèle développé par Ta (2009) est le plus approprié. Le taux d'évaporation réelle depuis le sable a été ensuite analysé. Il semble important de considérer l'avancement du front sec pendant le processus d'évaporation pour les sols sableux. Pour l'argile d'Héricourt, une bonne prévision a été également obtenue en utilisant un modèle qui tient compte de l'effet des fissures de dessiccation
As a well-known phenomenon, soil water evaporation plays an important role in the interaction between soil and atmosphere. Water evaporates during this process resulting in changes of soil thermo-hydro-mechanical behavior and in turn causing problems in different domains such as agronomy, hydrology, soil science, geotechnical engineering, etc. Therefore, it is essential to investigate the soil water evaporation mechanisms in depth.This study deals with the soil water evaporation mechanisms under controlled atmospheric conditions. The Fontainebleau sand and the Hércourt clay used for the construction of the experimental embankment with the ANR project TerDOUEST (Terrassements Durables - Ouvrages en Sols Traités, 2008 - 2012) were used in this investigation. A large-scale environmental chamber system (900 mm high, 800 mm large and 1000 mm long) equipped with various sensors was firstly developed, allowing a full monitoring of both atmospheric and soil parameters during the evaporation process. Four experimental tests were carried out on the Fontainebleau sand compacted at 1.70 Mg/m3 dry density with a steady water table at soil bottom under different atmospheric conditions (different values of air relative humidity, temperature and air flow rate). The performance of the environmental chamber system in investigating soil water evaporation was evidenced by the quality and the relevance of results. The air temperature inside the chamber was found to be affected by the heating tube temperature, the air flow rate and the soil water evaporation process; the soil temperature was strongly affected by the air conditions and the evaporation progress; the relative humidity in the chamber was decreasing during the evaporation progress and its evolution could be considered as an indicator of the evaporation progress; the volumetric water content in the near-surface zone was strongly affected by the evaporation process and exhibited a linear relationship with depth; the soil suction was decreasing over depth and increasing over time; the evaporation rate was strongly affected by the air conditions especially at the initial constant evaporation rate stage. After the tests on the Fontainebleau sand, the Hércourt clay sample compacted at 1.40 Mg/m3 dry density was subjected to an infiltration experiment for investigating its hydraulic properties. To get a better insight into the water evaporation mechanism for clay, two compacted Hércourt clay evaporation tests with a steady water table at bottom were carried out under controlled atmospheric conditions. The results allow understanding the evaporation mechanisms in case of desiccation cracks. Furthermore, in order to investigate the potential evaporation mechanisms, tests with a free water layer was also conducted with varying wind speed and air temperature. The initiation and propagation of desiccation cracking during the evaporation process and its effect on water evaporation were also investigated by the digital image processing technique. In terms of modeling, the potential evaporation rate was first modeled through evaluation of the existing models and the combined models. It reveals that the model developed by Ta (2009) is the most appropriate one. The actual evaporation rate for sand was then analyzed. It appears important to consider the progress of the dry front during the evaporation process for sandy soils. For the Héricourt clay, good simulation was also obtained using a model that accounts for the effect of desiccations cracks
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Frosin, Catalin. "The 16O+ 12C reaction at 90.5, 110 and 130 MeV beam energy." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13511/.

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Questo lavoro di tesi è inserito in uno studio, nell'ambito della collaborazione NUCL-EX, delle collisioni tra ioni pesanti per indagare le proprieta statistiche e la struttura della materia nucleare per sistemi con massa A<40. In particolare è stata studiata la reazione 16O+12C, ad energie di fascio di 90.5 MeV, 110 MeV e 130 MeV. Lo scopo della misura è quello di studiare il meccanismo di fusione-evaporazione e le possibili deviazioni da un decadimento puramente statistico del nucleo composto (28Si) che si viene a formare. Il confronto tra i dati sperimentali e quelli ottenuti da una previsione basata sul modello statistico Hauser-Feschbach, ottimizzato per lo studio di nuclei leggeri (HFl), è in grado di fornire indicazioni su effetti di struttura come già evidenziato in passato dalla collaborazione in reazioni analoghe. Questi sono principalmente legati nel nostro caso alla possibile struttura a cluster di particelle alfa che persistono oltre le soglie di emissione di particella. La misura è stata effettuata presso i Laboratori Nazionali di Legnaro sfruttando il fascio fornito da un acceleratore Tandem XTU e l'apparato sperimentale formato dai rivelatori GARFIELD e Ring Counter (RCo). L'analisi si è concentrata sia sullo studio di osservabili inclusivi come le distribuzioni energetiche e angolari delle particelle emesse che di osservabili esclusivi come la probabilità di decadimento in canali specifici. Questi risultati preliminari ottenuti per la reazione 16O+12C hanno in effetti evidenziato la presenza di effetti di struttura legate all'emissione di cluster-alfa, in particolare quando il residuo e un nucleo di carica pari. Si discute anche della dipendenza dall'energia incidente, e quindi dall'energia di eccitazione del 28Si, di questi effetti. In conclusione si indicano gli aspetti da investigare con maggior dettaglio per ottenere risultati piu consolidati e cercare di definire le cause di queste deviazioni dal modello statistico.
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Liang, Huayan. "Evaporation Enhancement for Condensational Nanoparticle Growth in Hydrophobic Evaporation - Condensation Tube." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1407407189.

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Thomas, Angeli Elizabeth. "Mathematical modelling of evaporation mechanisms and instabilities in cryogenic liquids." Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/50640/.

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In this thesis we propose a model for laminar natural convection within a mixture of two cryogenic fluids with preferential evaporation. This full model was developed after a number of smaller models of the behaviour of the surface of the fluid had been examined. Throughout we make careful comparison between our analytical and computational work and existing experimental and theoretical results. The coupled differential equations for the main model were solved using an explicit upwind scheme for the vorticity-transport, temperature and concentration equations and the multigrid method for the Poisson equation. From plots of the evolution of the system, it is found that convection becomes stronger when preferential evaporation is included. This new model demonstrates how to include preferential evaporation, and can be applied to other fluid systems.
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Janecek, Vladislav. "Evaporation à l'échelle microscopique et à haut flux thermique." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00782517.

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Cette thèse étudie théoriquement les processus de transport au voisinage de la ligne triple de contact liquide-gaz-solide et leur impact sur l'évaporation macroscopique. Dans la première partie de la thèse, l'hydrodynamique au voisinage de la ligne de contact est étudiée sous les conditions de mouillage partiel. L'évaporation induite par le chauffage du substrat dans l'atmosphère de vapeur du même fluide est considérée. La relaxation de la singularité hydrodynamique de la ligne triple est considérée. La principale conclusion de la thèse est que l'effet Kelvin (dépendance de la température de saturation de la pression) est suffisant en soi, pour faire disparaitre la singularité des variables hydrodynamiques. La microrégion (le voisinage de la ligne de contact) est résolue numériquement et analytiquement pour de faibles pentes de l'interface liquide-vapeur. Les échelles de longueur caractéristiques du problème sont identifiées et la nature multi-échelle du phénomène est prise en compte. Les études paramétriques effectuées révèlent le rôle de la résistance thermique de l'interface vapeur-liquide, de la longueur de glissement, du terme thermocapillaire, du recul de vapeur et ainsi que des forces de surface. Une extension de l'approximation de lubrification pour de pentes élevées de l'interface gaz-liquide à l'évaporation est discutée. Dans la seconde partie de la thèse, le modèle précédemment établi pour la microrégion est couplé à des simulations numériques de la croissance d'une bulle de vapeur. Le départ de la bulle de vapeur de la paroi chauffante pendant l'ébullition a également été étudiée. Il a été proposé dans la thèse, que sous des charges thermiques élevées, l'augmentation de l'angle de contact apparent provoque l'étalement de la bulle de vapeur sur la paroi chauffante. Ce phénomène peut conduire, au séchage de la paroi observé pendant la crise d'ébullition.
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Books on the topic "Evaporation mechanism"

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Wong, Shwin-Chung. The Evaporation Mechanism in the Wick of Copper Heat Pipes. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04495-8.

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Statistical models for nuclear decay: From evaporation to vaporization. Philadelphia, Pa: Institute of Physics Pub., 2000.

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Schmidt, G. R. Thermocapillary flow with evaporation and condensation and its effect on liquid retention in low-G fluid acquisition devices. Washington, D.C: National Aeronautics and Space Administration, Scientific and Technical Information Office, 1994.

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Wong, Shwin-Chung. The Evaporation Mechanism in the Wick of Copper Heat Pipes. Springer, 2014.

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Harris, Logan Dale. An analysis of the propagation mechanism for rapid evaporation waves. 2006.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., ed. Thermocapillary flow with evaporation and condensation and its effect on liquid retention in low-G fluid acquisition devices. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1994.

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Blundell, Katherine. 5. Entropy and thermodynamics of black holes. Oxford University Press, 2015. http://dx.doi.org/10.1093/actrade/9780199602667.003.0005.

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‘Entropy and thermodynamics of black holes’ considers how the laws of thermodynamics and entropy can be applied to black holes. It discusses the work of Roger Penrose, James Bardeen, Brandon Carter, and Stephen Hawking, which, using quantum mechanics and quantum field theory, has enabled these scientists to propose likely behaviour in and around black holes. The concepts of black hole evaporation and Hawking radiation are explained to show how black holes lose mass and eventually disappear. It concludes with the black hole information paradox: can the information stored in the matter that fell into the black hole ever be recovered?
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Clarke, Andrew. Temperature regulation. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199551668.003.0009.

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For many organisms there is a fitness advantage to being warm. Many organisms use behavioural thermoregulation to maintain a high body temperature during the day, basking in the sun to warm up and retreating to the shade to avoid overheating. This option is not open to most aquatic organisms, or those living in soil or sediment. It is also generally not possible for small or nocturnal organisms. A small number of active predatory fish utilise a counter-current heat exchanger (rete mirabile) to retain metabolic heat and warm their muscles, brain or eyes. A few have modified optical muscles as heater organs, and a range of plants generate heat to aid dispersal of scent and attract pollinators. A wide range of larger insects use rapid but unsynchronised muscle contraction to elevate their body temperature prior to flight, or other activity. In hot climates organisms may need to dissipate heat to avoid overheating. The major behavioural mechanism is shade-seeking, or for small organisms stilting or climbing onto objects such as plants to move out of the hottest air net to the ground. Larger mammals may tolerate a limited degree of warming during the day, releasing this in the cool of the night. Evaporative cooling is very effective at losing heat, but because it loses valuable water it can only be used sparingly in arid areas.
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Book chapters on the topic "Evaporation mechanism"

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Wong, Shwin-Chung. "The Evaporation Mechanism in the Wick of Copper Heat Pipes." In The Evaporation Mechanism in the Wick of Copper Heat Pipes, 1–36. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04495-8_1.

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Ushakov, A. V., I. V. Karpov, A. A. Shaikhadinov, and E. A. Goncharova. "The Mechanism of Microdroplet Fraction Evaporation in the Plasma of the Cathode Region of a Low-Pressure Arc Discharge." In Advances in Intelligent Systems and Computing, 210–15. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51974-2_18.

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Rada-Vilela, Juan, Mengjie Zhang, and Winston Seah. "Evaporation Mechanisms for Particle Swarm Optimization." In Lecture Notes in Computer Science, 238–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-34859-4_24.

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Beduz, C., and R. G. Scurlock. "Evaporation Mechanisms and Instabilities in Cryogenic Liquids." In Advances in Cryogenic Engineering, 1749–57. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2522-6_214.

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Nomura, Hiroshi, Michikata Kono, Jun’ichi Sato, Günther Marks, Heinrich Iglseder, and Hans J. Rath. "Effects of the Natural Convection on Fuel Droplet Evaporation." In Microgravity Fluid Mechanics, 245–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-50091-6_27.

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Romo Cruz, Julio César Rubén, Sergio Hernández Zapata, and Gerardo Ruiz Chavarría. "Study of a Surface of a Liquid Layer in Evaporation." In Experimental and Computational Fluid Mechanics, 379–87. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00116-6_33.

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Sazhin, Sergei Stepanovich. "Classical and Novel Approaches to Modelling Droplet Heating and Evaporation." In Fluid Mechanics and Its Applications, 251–58. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33338-6_20.

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Jots, Cornelius E. "Evaporation as a diagnostic test for hydrodynamic cooling of laser-ablated clusters." In Laser Ablation Mechanisms and Applications, 294–96. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/bfb0048384.

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Román, C. E., and I. L. Garzón. "Computer Simulation Study of the Evaporation Mechanisms in Lennard-Jones Clusters." In Physics and Chemistry of Finite Systems: From Clusters to Crystals, 459–64. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-017-2645-0_60.

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Tsujino, J., N. Tatsumi, and Y. Shiohara. "Growth mechanisms of YBa2Cu3Ox films prepared by rf thermal plasma evaporation." In Advances in Superconductivity VII, 893–96. Tokyo: Springer Japan, 1995. http://dx.doi.org/10.1007/978-4-431-68535-7_201.

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Conference papers on the topic "Evaporation mechanism"

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Carey, Van P., Claire K. Wemp, Emma R. McClure, and Samuel Cabrera. "Mechanism Interaction During Droplet Evaporation on Nanostructured Hydrophilic Surfaces." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87991.

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Recent studies of droplet spreading on nanostructured surfaces have demonstrated that the fluid motion and wicking effects impact the morphology of the liquid on the nanostructured surface and the thermophysics of the vaporization process. In the investigation summarized here, models of the spreading mechanism, and mechanisms of heat transport to the interface of a spreading droplet are used to explore the interaction of these mechanisms during the droplet vaporization process on nanostructured hydrophilic surfaces. Exploration of the trends in the model predictions and their comparison with experimental data suggests that the wickability of such surfaces causes an impinging droplet to quickly spread to form a thin liquid film with a somewhat curved interface. This liquid film has a mean thickness in the range of 10–100 microns near the contact line at the outer perimeter of the droplet footprint. If the surface is highly superheated, bubble nucleation and a nucleate boiling mechanism may augment conduction across the liquid film to facilitate evaporation. However, physical arguments and data from droplet evaporation experiments suggest that nucleation in the interstitial spaces of the nanoporous layer may be suppressed as a result of the extremely small size of those spaces. The role of these different mechanisms and the stages of the vaporization process for impinging droplets is discussed in detail. This exploration indicates that the wickability effect on droplet spreading strongly enhances the droplet evaporation heat transfer.
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Fernandez-Marquez, Jose Luis, and Josep-Lluis Arcos. "Evaporation as a Self-Adaptation Mechanism for PSO." In 2008 Second IEEE International Conference on Self-Adaptive and Self-Organizing Systems (SASO). IEEE, 2008. http://dx.doi.org/10.1109/saso.2008.27.

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Liu, Runkeng, and Zhenyu Liu. "Enhanced Mechanism of Water Evaporation Through Nanoporous Membrane." In ASME 2021 Heat Transfer Summer Conference collocated with the ASME 2021 15th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/ht2021-61719.

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Abstract Evaporation through nanoporous membrane has attracted tremendous research attention as a ubiquitous natural phenomenon, which can be used in numerous applications. In this work, we explored the ultrathin water film evaporation process on nanoporous membrane based on non-equilibrium molecular dynamics simulation. A heat localization design of multilayer graphene coated at the bottom of membrane was implemented to reduce the heat loss along the non-evaporation direction. The underlying mechanism of water evaporation through nanoporous membrane was investigated after analysis of the average number of hydrogen bonds per water molecule, the temperature variation and the mean squared displacement of water molecular during the evaporation process. The results showed that the change of pore size will affect the water molecules structure. We also discussed the effect of heat localization design on ultrathin water film evaporation process. The result suggested that water molecules are more active and evaporation efficiency is improved correspondingly. This work reveals the feasibility of the novel nanoporous membrane structure design for enhancing heat and mass transfer, which can be adopted in efficient thermal management and low-cost approaches for water desalination.
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Mukherjee, A. "Contribution of Microlayer Evaporation During Flow Boiling Inside Microchannels." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62055.

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Flow boiling through microchannels is characterized by nucleation and growth of vapor bubbles that fills the entire channel cross-sectional area. As the bubble nucleates and grows inside the microchannel, a thin film of liquid or a microlayer gets trapped between the bubble and the channel walls. The heat transfer mechanism present at the channel walls during flow boiling is studied numerically. These mechanisms are compared to the heat transfer mechanisms present during nucleate boiling and in a moving evaporating meniscus. It is shown that the thermal and the flow fields present inside the microchannels around the bubbles are fundamentally different compared to nucleate boiling or in a moving evaporating meniscus. It is explained that how thin film evaporation is responsible for creating an apparent nucleate boiling heat transfer mechanism inside the microchannels.
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Fernandez-Marquez, Jose Luis, and Josep Lluis Arcos. "An evaporation mechanism for dynamic and noisy multimodal optimization." In the 11th Annual conference. New York, New York, USA: ACM Press, 2009. http://dx.doi.org/10.1145/1569901.1569905.

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Joshi, Aditee, S. K. Gupta, Manmeet Kaur, J. B. Singh, J. V. Yakhmi, M. R. Singh, and R. H. Lipson. "Growth Mechanism of Zinc Oxide Nanostructures by Carbothermal Evaporation Technique." In TRANSPORT AND OPTICAL PROPERTIES OF NANOMATERIALS: Proceedings of the International Conference—ICTOPON-2009. AIP, 2009. http://dx.doi.org/10.1063/1.3183457.

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Azarkish, Hassan, Amin Behzadmehr, and Luc G. Frechette. "Modeling the Performance of Bi-Textured Micropillar Array as a Wicked Evaporator." In ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ht2016-7366.

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In the present work, the performance of bi-textured micro pillar arrays has been modeled as a wicked evaporator to provide steam flow via the thin film evaporation mechanism. Bi-textured micro pillar evaporator consists of an array with rough hydrophilic pillar bases and smooth hydrophobic tips. Water wicks between the rough hydrophilic sections of the micro pillar array to cover the surface, and vaporizes from the thin films that are formed in the vicinity of the pillar walls. The stability of the phase change mechanism is increased due to the change in direction of the capillary forces at the rough-smooth interface of micro pillars. The experimental results show that the pure evaporation mechanism occurs for a surface temperature above saturation on the bi-textured micro pillar array. The numerical analysis shows that there are optimal micro pillar dimensions for each surface temperature. The evaporation mass flow rate at the optimum dimensions is higher than the pool boiling mass flow rate on a bare surface at the same surface temperature. However, the wicked evaporator performance decreases for larger evaporator sizes.
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Seers, P., V. Reguillet, E. Plamondon, L. Dufresne, and S. Halle´. "Evaporation Time of Gasoline and Diesel Fuel Droplets on a Hot Plate: The Influence of Fuel Deposits." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68786.

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The objective of this paper is to present experimental results of multicomponent fuel droplets impinging on a hot surface in order to quantify the influence of fuel build-up deposits on the evaporation time. The experiments were conducted with gasoline and diesel fuels to first obtain curves of evaporation time as a function of plate temperature. Based on these curves the Nukiyama and Leindenfrost temperatures were identified. In a second step, the effect of fuel deposit on the droplet evaporation time was studied. Based on the above evaporation time curves, plate temperatures were chosen as to offer a similar evaporation time but at temperatures below and above the Nukiyama and Leindenfrost temperatures respectively. This was done in order to isolate the effect of fuel deposits from the different evaporation mechanisms. The evaporation of successive impinging droplets was then measured. The results hence obtained indeed showed that the fuel deposit has a different impact on the evaporation time according the evaporating mechanism or equivalently the plate temperature. For plate temperatures lower than the Nukiyama temperature, gasoline and diesel fuel droplets showed an increase of their evaporation time as the amount of successive impinging droplets increased. The trend was reversed for plate temperatures above the Leindenfrost temperature. A hypothesis for this latter case is that the fuel deposit disrupts the vapor layer supporting the droplet and therefore provides a greater heat flux to the evaporating droplet. Finally, droplet evaporation times as a function of plate temperature were measured with an initial fuel deposit covering the plate. These results in turn showed that the global thermal diffusivity and porosity of the surface are changed by the presence of the fuel deposit. The consequence of these property changes are then shown to have a direct and global impact on the fuel evaporation time curves.
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Sait, Hani H., Steve M. Demsky, and HongBin Ma. "Thermal Conductivity and Operating Temperature Effect on the Interline Region in a Micro/Miniature Heat Pipe." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52043.

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An analytical model describing thin film evaporation is developed that includes the effects of surface tension, frictional shear stress, wetting characteristics and disjoining pressure. The effects of thermal conductivity of working fluids and operating temperature on the evaporating thin film region are also studied. The results indicate that when the thermal conductivity of the working fluid increases, a high heat flux can be removed from the evaporating thin film region. The operating temperature affects the thin film evaporation. The higher the operating temperature, the more heat flux can be removed from the region. The information of thin film evaporation presented in the paper results in a better understanding of heat transfer mechanism occurring in micro heat pipes.
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Protheroe, Michael D., and Ahmed M. Al-Jumaily. "Ultrasound Effect on Droplet Evaporation." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50552.

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This paper investigates the effect of an ultrasound field on the evaporation of water droplets into an air stream flowing along a conduit. The air and droplet mixture (aerosol) is passed through an intense ultrasound field, generated in a cylindrical sonotrode, in an effort to accelerate the droplet evaporation process. The improvement in droplet evaporation was evaluated by measuring changes in the droplet size distribution and changes to the air humidity and temperature. It was found that at high power levels the droplets were rapidly and completely vaporized. At power levels in the 2–20 W range there was a significant increase in droplet evaporation, up to 28%, but also some droplet coalescence occurred. The mechanism for this improvement was thought to be a result of enhanced convection heat and mass transfer processes and the input of heat energy into the aerosol. This study has demonstrated that an ultrasound field does improve water droplet evaporation.
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Reports on the topic "Evaporation mechanism"

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Carre, D. J., and P. A. Bertrand. A Model to Calculate Evaporative Oil Loss in Spacecraft Mechanisms,. Fort Belvoir, VA: Defense Technical Information Center, September 1998. http://dx.doi.org/10.21236/ada354744.

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