Relevant bibliographies by topics / Multiphase interactions

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Academic literature on the topic 'Multiphase interactions'

Author: Grafiati
Published: 20 February 2023

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Journal articles on the topic "Multiphase interactions"

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Berlinger, Sarah A., Samay Garg, and Adam Z. Weber. "Multicomponent, multiphase interactions in fuel-cell inks." Current Opinion in Electrochemistry 29 (October 2021): 100744. http://dx.doi.org/10.1016/j.coelec.2021.100744.

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Sedarsky, David, Mattias Rahm, and Mark Linne. "Visualization of acceleration in multiphase fluid interactions." Optics Letters 41, no. 7 (March 17, 2016): 1404. http://dx.doi.org/10.1364/ol.41.001404.

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Ismayilov, G. G. "Multiphase technologies in oil-gas production." Azerbaijan Oil Industry, no. 11 (November 15, 2020): 42–46. http://dx.doi.org/10.37474/0365-8554/2020-11-42-46.

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Emergency cases, complications, maximum energetic cost, human and material expenses, negative impact on the environment in the oil-gas production taking place in the system “ well – oil and gas collection” are predominantly associated with the multiphase and multicomponent well production. Considering the research results of recent years, we can mark that in the view of hydraulic properties of the flows and interactions of seperate phases, currently are formed multiphase technologies, on the basis of which solution of various issues and increase of efficiency of technological processes in production, collection, transportation and storage of oil and gas becomes possible. The paper reviews the perspectives of solution of few issues of oil-gas production using multiphase technologies, on the basis of which the phase interaction lies. Some problems of oil-gas production, the solution of which becomes possible with multiphase technologies are noted as well.
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Tuan, Wei Hsing. "Design of Multiphase Materials." Key Engineering Materials 280-283 (February 2007): 963–66. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.963.

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In the present study, several principles are introduced as the guidelines to design multi- phased materials. Each phase in the multiphase material can offer one function or property to the material. The functions contributed from the phases within the multiphase material can interact with each other. Such interactions can be tailored by suitable microstructure design. The Al2O3-ZrO2-Ni multiphase material is used to demonstrate the applications of the design principles.
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Halik, Azhar, Rahmatjan Imin, Mamtimin Geni, Afang Jin, and Yangyang Mou. "Numerical Modeling for Discrete Multibody Interaction and Multifeild Coupling Dynamics Using the SPH Method." Mathematical Problems in Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/205976.

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Discrete multibody interaction and contact problems and the multiphase interactions such as the sand particles airflow interactions by Aeolian sand transport in the desert are modeled by using the different kernel smoothing lengths in SPH method. Each particle defines a particular kernel smoothing length such as larger smoothing length which is used to calculate continuous homogenous body. Some special smoothing lengths are used to approximate interaction between the discrete particles or objects in contact problems and in different field coupling problem. By introducing the Single Particle Model (SPM) and the Multiparticle Model (MPM), the velocity exchanging phenomena are discussed by using different elastic modules. Some characteristics of the SPM and MPM are evaluated. The results show that the new SPH method can effectively solve different discrete multibody correct contact and multiphase mutual interference problems. Finally, the new SPH numerical computation and simulation process are verified.
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Huang, Pengyu, Luming Shen, Yixiang Gan, Giang D. Nguyen, Abbas El-Zein, and Federico Maggi. "Coarse-grained modeling of multiphase interactions at microscale." Journal of Chemical Physics 149, no. 12 (September 28, 2018): 124505. http://dx.doi.org/10.1063/1.5038903.

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LUO, K. H., J. XIA, and E. MONACO. "MULTISCALE MODELING OF MULTIPHASE FLOW WITH COMPLEX INTERACTIONS." Journal of Multiscale Modelling 01, no. 01 (January 2009): 125–56. http://dx.doi.org/10.1142/s1756973709000074.

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This paper presents a variety of modeling and simulation methods for complex multiphase flow at microscopic, mesoscopic and macroscopic scales. Each method is discussed in terms of its scale-resolving capability and its relationship with other approaches. Examples of application are provided using a liquid–gas system, in which complex multiscale interactions exist among flow, turbulence, combustion and droplet dynamics. Large eddy simulation (LES) is employed to study the effects of a very large number of droplets on turbulent combustion in two configurations in a fixed laboratory frame. Direct numerical simulation (DNS) in a moving frame is then deployed to reveal detailed dynamic interactions between droplets and reaction zones. In both the LES and the DNS, evaporating droplets are modeled in a Lagrangian macroscopic approach, and have two-way couplings with the carrier gas phase. Finally, droplet collisions are studied using a multiple-relaxation-time lattice Boltzmann method (LBM). The LBM treats multiphase flow with real-fluid equations of state, which are stable and can cope with high density ratios. Examples of successful simulations of droplet coalescence and off-center separation are given. The paper ends with a summary of results and a discussion on hybrid multiscale approaches.
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Scheie, Allen, Jonas Kindervater, Shu Zhang, Hitesh J. Changlani, Gabriele Sala, Georg Ehlers, Andre Heinemann, Gregory S. Tucker, Seyed M. Koohpayeh, and Collin Broholm. "Multiphase magnetism in Yb2Ti2O7." Proceedings of the National Academy of Sciences 117, no. 44 (October 23, 2020): 27245–54. http://dx.doi.org/10.1073/pnas.2008791117.

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We use neutron scattering to show that ferromagnetism and antiferromagnetism coexist in the low T state of the pyrochlore quantum magnetYb2Ti2O7. While magnetic Bragg peaks evidence long-range static ferromagnetic order, inelastic scattering shows that short-range correlated antiferromagnetism is also present. Small-angle neutron scattering provides direct evidence for mesoscale magnetic structure that we associate with metastable antiferromagnetism. Classical Monte Carlo simulations based on exchange interactions inferred from⟨111⟩-oriented high-field spin wave measurements confirm that antiferromagnetism is metastable within the otherwise ferromagnetic ground state. The apparent lack of coherent spin wave excitations and strong sensitivity to quenched disorder characterizingYb2Ti2O7is a consequence of this multiphase magnetism.
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Frostad, John M., Martha C. Collins, and L. Gary Leal. "Cantilevered-Capillary Force Apparatus for Measuring Multiphase Fluid Interactions." Langmuir 29, no. 15 (April 2013): 4715–25. http://dx.doi.org/10.1021/la304115k.

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N. Ibragimov, Ranis, Akshin S. Bakhtiyarov, and Margaret Snell. "Experimental Mixing Parameterization Due to Multiphase Fluid � Structure Interactions." i-manager's Journal on Future Engineering and Technology 5, no. 2 (January 15, 2010): 1–8. http://dx.doi.org/10.26634/jfet.5.2.1089.

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Dissertations / Theses on the topic "Multiphase interactions"

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Farhan, Noor M. "Multiphase Droplet Interactions with a Single Fiber." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5937.

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Abstract Multiphase Droplet Interactions with a Single Fiber By: Noor M. Farhan A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at Virginia Commonwealth University. Virginia Commonwealth University, 2019 Director: Hooman V. Tafreshi, Professor, Department of Mechanical and Nuclear Engineering Formulating the physics of droplet adhesion to a fiber is interesting intellectually and important industrially. A typical example of a droplet–fiber system in nature is the dew droplets on spider webs, where droplets first precipitate and grow on the fibers, but they eventually fall when they become too heavy. Obviously, quantifying the force of adhesion between a droplet and a fiber is crucial in designing fog harvesting devices or manufacturing filtration media for liquid–gas or liquid–liquid separation, among many other industrial applications. This study is aimed at developing a mathematical framework for the mechanical forces between a droplet and a fiber in terms of their physical and wetting properties. To this end, a series of experiments were conducted to detach ferrofluid droplets of varying volumes from fibers with different diameters and Young–Laplace contact angles (YLCAs) in a controlled magnetic field. The force of detachment was measured using a sensitive scale and used along with the results of numerical simulations to develop a semi-analytical expression for the force required to detach a droplet from a fiber. This universally-applicable expression allows one to predict the force detachment without the need to run an experiment or a computer simulation. This work also reports on the use of magnetic force to measure the force of detachment for nonmagnetic droplets for the first time. This is accomplished by adding a small amount of a ferrofluid to the original nonmagnetic droplet to create a compound droplet with the ferrofluid nesting inside or cloaking the nonmagnetic droplet. The ferrofluid is then used to induce a body force to the resulting compound droplet and thereby detach it from the fiber. The recorded detachment force is used directly (the case of nesting ferrofluid) or after scaling (the case of cloaking ferrofluid) to obtain the force of detachment for the original nonmagnetic droplet. The accuracy of these measurements was examined through comparison with numerical simulations as well as available experimental data in the literature. In addition, a simple method is developed to directly measure the intrinsic contact angle of a fiber (i.e., Young–Laplace Contact angle of the fiber material) with any arbitrary liquid. It is shown that the intrinsic contact angle of a fiber can be obtained by simply measuring the angle between the tangent to the fiber surface and the tangent to the droplet at the contact line, if the droplet possesses a clamshell conformation and is viewed from the longitudinal direction. The novelty of the proposed method is that its predictions are not affected by the volume of the droplet used for the experiment, the wettability of the fiber, the surface tension of the liquid, or the magnitude of the body force acting on the droplet during the experiment. Also, a liquid droplet interaction with granular coatings is simulated and the droplet apparent contact angle (ACA) and the transition from Cassie (fully dry) to Wenzel (fully wet) state as a function to the roughness wavelength have been studied. For a fixed droplet volume, two different granular coatings have been used, spherical and hemispherical bumps. It is demonstrated that the chemistry (YLCA) and geometrical parameters for the granular microtexture play an important effect on the droplet ACA and its transition from Cassie to Wenzel state.
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Koutsakis, Konstantinos. "Multiphase numerical modelling of particle-flow interactions in plasma spraying processes." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/412642/.

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The current work looks at the challenges of developing a computational solution for the modelling of the plasma spraying industrial process. A set of three 3D Computational Fluid Dynamics (CFD) models were developed and studied for this purpose. The first model that was implemented looks at the effects the electromagnetic properties have in the properties of the plasma flow in the nozzle of the spraying device. The second model studies the particle in flight atomisation after coding the thermal exchanges in the C++ framework and compares the results with experimental data. The third model studies the particle in-flight atomisation of molten metals and their resulting size distribution. The computational results from the first model agree with contemporary work analysing flows in nozzles of plasma spraying equipment. It also provides quantification of the additional energy exchanges that occur in the nozzle of a plasma spraying device, which are the ones that produce the gradients in velocity and temperature, which are met in plasma spraying processes. Finally, it looks into the effect the presence of dielectric may have on the plasma arc. The second model compares well with experimental data acquired by multiphase flows produced from plasma spraying devices and supports the finding that the Weber number is a good indicator of the deformation patterns of fluid particles, even liquid metal, where the density is much higher than regular liquids. The results of the third model in regards to particle size distribution show agreement with theoretical models of the distribution. The three models can be combined in the order presented, to provide a computational modelling solution which can cover the industrial application of the plasma spraying process, from the nozzle, to finer atomisation, to splat.
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Bonuccelli, Courtney Leigh Herring. "A theoretical and experimental investigation of multi-phase interactions in pure and multicomponent droplet evaporation." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Fall2006/C_Bonuccelli_012907.pdf.

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Ukai, Satoshi. "Richtmyer-Meshkov instability with reshock and particle interactions." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34724.

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Richtmyer-Meshkov instability (RMI) occurs when an interface of two fluids with different densities is impulsively accelerated. The main interest in RMI is to understand the growth of perturbations, and numerous theoretical models have been developed and validated against experimental/numerical studies. However, most of the studies assume very simple initial conditions. Recently, more complex RMI has been studied, and this study focuses on two cases: reshocked RMI and multiphase RMI. It is well known that reshock to the species interface causes rapid growth of interface perturbation amplitude. However, the growth rates after reshock are not well understood, and there are no practical theoretical models yet due to its complex interface conditions at reshock. A couple of empirical expressions have been derived from experimental and numerical studies, but these models are limited to certain interface conditions. This study performs parametric numerical studies on various interface conditions, and the empirical models on the reshocked RMI are derived for each case. It is shown that the empirical models can be applied to a wide range of initial conditions by choosing appropriate values of the coefficient. The second part of the study analyzes the flow physics of multiphase RMI. The linear growth model for multiphase RMI is derived, and it is shown that the growth rates depend on two nondimensional parameters: the mass loading of the particles and the Stokes number. The model is compared to the numerical predictions under two types of conditions: a shock wave hitting (1) a perturbed species interface surrounded by particles, and (2) a perturbed particle cloud. In the first type of the problem, the growth rates obtained by the numerical simulations are in agreement with the multiphase RMI growth model when Stokes number is small. However, when the Stokes number is very large, the RMI motion follows the single-phase RMI growth model since the particle do not rapidly respond while the RMI instability grows. The second type of study also shows that the multiphase RMI model is applicable if Stokes number is small. Since the particles themselves characterize the interface, the range of applicable Stokes number is smaller than the first study. If the Stokes number is in the order of one or larger, the interface experiences continuous acceleration and shows the growth profile similar to a Rayleigh-Taylor instability.
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Greco, Edwin F. "Thermal and hydrodynamic interactions between a liquid droplet and a fluid interface." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22548.

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Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2008.
Committee Chair: Roman O. Grigoriev; Committee Member: Daniel Goldman; Committee Member: Michael Schatz; Committee Member: Minami Yoda; Committee Member: Predrag Cvitanovic.
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Qin, Tong. "Numerical Simulations of Interactions of Solid Particles and Deformable Gas Bubbles in Viscous Liquids." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19225.

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Studying the interactions of solid particles and deformable gas
bubbles in viscous liquids is very important in many applications,
especially in mining and chemical industries. These interactions
involve liquid-solid-air multiphase flows and an
arbitrary-Lagrangian-Eulerican (ALE) approach is used for the direct
numerical simulations. In the system of rigid particles and
deformable gas bubbles suspended in viscous liquids, the
Navier-Stokes equations coupled with the equations of motion of the
particles and deformable bubbles are solved in a finite-element
framework. A moving, unstructured, triangular mesh tracks the
deformation of the bubble and free surface with adaptive refinement.
In this dissertation, we study four problems. In the first three
problems the flow is assumed to be axisymmetric and two dimensional
(2D) in the fourth problem.

Firstly, we study the interaction between a rising deformable bubble
and a solid wall in highly viscous liquids. The mechanism of the
bubble deformation as it interacts with the wall is described in
terms of two nondimensional groups, namely the Morton number (Mo)
and Bond number (Bo). The film drainage process is also
considered. It is found that three modes of bubble-rigid wall
interaction exist as Bo changes at a moderate Mo.
The first mode prevails at small Bo where the bubble deformation
is small. For this mode, the bubble is
hard to break up and will bounce back and eventually attach
to the rigid wall. In the second mode, the bubble may break up after
it collides with the rigid wall, which is determined by the film
drainage. In the third mode, which prevails at high Bo, the bubble
breaks up due to the bottom surface catches up the top surface
during the interaction.

Secondly, we simulate the interaction between a rigid particle and a
free surface. In order to isolate the effects of viscous drag and
particle inertia, the gravitational force is neglected and the
particle gains its impact velocity by an external accelerating
force. The process of a rigid particle impacting a free surface and
then rebounding is simulated. Simplified theoretical models are
provided to illustrate the relationship between the particle
velocity and the time variation of film thickness between the
particle and free surface. Two film thicknesses are defined. The
first is the thickness achieved when the particle reaches its
highest position. The second is the thickness when the particle
falls to its lowest position. The smaller of these two thicknesses
is termed the minimum film thickness and its variation with the
impact velocity has been determined. We find that the interactions
between the free surface and rigid particle can be divided into
three regimes according to the trend of the first film thickness.
The three regimes are viscous regime, inertial regime and jetting
regime. In viscous regime, the first film thickness decreases as the
impact velocity increases. Then it rises slightly in the inertial
regime because the effect of liquid inertia becomes larger as the
impact velocity increases. Finally, the film thickness decreases
again due to Plateau-Rayleigh instability in the jetting regime.
We also find that the minimum film thickness corresponds to an
impact velocity on the demarcation point between the viscous and
inertial regimes. This fact is caused by the balance of viscous
drag, surface deformation and liquid inertia.

Thirdly, we consider the interaction between a rigid particle and a
deformable bubble. Two typical cases are simulated: (1) Collision of
a rigid particle with a gas bubble in water in the absence of
gravity, and (2) Collision of a buoyancy-driven rising bubble with a
falling particle in highly viscous liquids. We also compare our
simulation results with available experimental data. Good agreement
is obtained for the force on the particle and the shape of the
bubble.

Finally, we investigated the collisions of groups of bubbles and
particles in two dimensions. A preliminary example of the oblique
collision between a single particle and a single bubble is conducted
by giving the particle a constant acceleration. Then, to investigate
the possibility of particles attaching to bubbles, the interactions
between a group of 22 particles and rising bubbles are studied. Due
to the fluid motion, the particles involved in central collisions
with bubbles have higher possibilities to attach to the bubble.
Ph. D.
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Grosche, Lucas Caetano. "Study of the interactions between emulsion flow and a spectrometer probe based on numerical simulations." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17102014-114519/.

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In the present work, the flow behavior of an oil-in-water emulsion around and inside the measurement chamber of an in-line optical sensor probe is studied. The emulsion consists of a metalworking fluid, with oil droplets diameter ranging from 100 nanometers to 100 micrometers. The design of the UV-Vis light spectrometer probe is in accordance with the concept proposed in the research project named EPM (Emulsion Process Monitor in Metalworking Processes), carried out within the scope of the BRAGECRIM program between the University of São Paulo and the University of Bremen. This study is based on the numerical simulation of the interactions between the emulsion and the measurement system using computational fluid dynamic techniques, and is aimed at evaluating the effects of the probe geometry, its position relative to the flow field, and fluid properties on the expected spectrometer readings. Such effects are correlated with changes in droplet concentration and or droplet size segregation inside the measurement chamber of the optical probe, which can cause changes in the scattered light intensity readings. Segregation effects due to flow disturbances around the probe can be neglected under normal measurement conditions, with the probe facing the slit area inlet against the flow stream. Based on the simulation results, even if the probe is misplaced, the effect on the measurements is still insignificant. In-situ measurements carried out in a laboratory set up installed in the injection tube of a drilling machine support the simulation results, since no segregation effect related to the measurement system was observed. In addition to the study, the possibility of bacteria attachment on the internal glass walls of the probe was evaluated and it was found that when the flow velocity is large enough to produce a wall shear stress of about 3-5 Pa the bacterial contamination may be avoided. Changes in the probe geometry are proposed in order to attain an isokinetic condition for the flow around and inside the probe, resulting in a higher wall shear stress for lower inlet flow velocities. An additional study was performed using a tracking particle model to understand the relevance of the individual particles behavior under different flow conditions. The results do not indicate any significant effect on the measurements inside the probe, although additional studies should be carried out in this topic by considering a population balance model for the oil droplets.
O presente trabalho tem como objetivo o estudo do comportamento do escoamento de uma emulsão do tipo óleo - em água que flui no interior de câmara/duto de medição e que tem como obstáculo em seu caminho uma sonda de um sensor óptico, sensor óptico este que deve avaliar em tempo real a estabilidade da emulsão onde está inserido. A emulsão é constituída por um fluido de corte para usinagem, com gotículas de óleo de diâmetro variando de 100 nanômetros para 100 micrometros. A sonda utilizada junto ao espectrômetro de luz UV- Vis está de acordo com o conceito proposto no projeto de pesquisa chamado EPM (Emulsion Process Monitor in Metalworking Fluid), realizado no âmbito do programa BRAGECRIM entre a Universidade de São Paulo e a Universidade de Bremen. Este estudo baseia-se na simulação numérica das interações entre a emulsão e o sistema de medição proposto, utilizando técnicas de Fluido Dinâmica Computacional (CFD), e tem por objetivo avaliar os efeitos da geometria da sonda, a sua posição em relação ao campo do escoamento, e propriedades do fluido, em especial as propriedades a serem medidas pelo espectrômetro. Tais efeitos estão correlacionadas com alterações na concentração de gotas e a segregação ou o tamanho das gotas dentro da câmara de medição da sonda óptica, o que pode causar mudanças nas leituras de intensidade de luz difusa. Efeitos de segregação devido a perturbações do escoamento em torno da sonda podem ser negligenciados, em condições normais de medição, com a sonda voltada para frente e sua área de entrada contra a corrente do escoamento. Com base nos resultados de simulação, mesmo que a sonda seja deslocada, o efeito sobre as medições ainda é insignificante. Medições foram efetuadas em laboratório e também foram realizadas medições in-situ utilizando um adaptador de medição acoplado diretamente no tubo de injeção de fluido de corte da máquina de perfuração, estes testes foram feitos para de validar os resultados obtidos por simulação, uma vez que não se observou qualquer efeito de segregação relacionada com o sistema de medição. Além disso, foi acrescentada ao estudo, a possibilidade de fixação de bactérias nas paredes de vidro internas da sonda e verificou-se que quando a velocidade de escoamento é suficientemente grande para produzir uma tensão de cisalhamento de cerca de 3-5 Pa a fixação de bacteriana pode ser evitado. Aproveitando os resultados do estudo para prevenção de contaminação por bactéria, mudanças na geometria da sonda foram propostas a fim de atingir uma condição isocinética para o escoamento ao redor e dentro da sonda, resultando em uma maior tensão de cisalhamento para baixas velocidades de fluxo de entrada. Por fim um estudo adicional foi realizado utilizando um modelo de rastreamento de partículas para compreender a relevância do comportamento individual de cada partícula no escoamento da emulsão. Os resultados não indicam qualquer efeito significativo sobre as medições no interior da sonda, embora estudos adicionais devem ser realizados neste tópico, considerando um modelo de balanço populacional para as gotículas de óleo.
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Huang, Pengyu. "Multiscale Modelling of Dynamic Contact Angles for CO2-Water-Silica Systems." Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/20937.

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The capillary and dynamic wetting behaviour in porous media is crucial in many engineering problems which are highly related to the multiphase interactions between fluids and solids. This thesis will focus on the behaviour of dynamic contact angle of the supercritical CO2/water flow in the silica slit as a function of the contact line velocity at both the nanoscale and microscale, which can help us gain an in-depth understanding of the dynamic processes in CO2 geosequestration in saline aquifers. Our molecular dynamics (MD) simulations calculate the contact angle quantitatively at different velocities at the nanoscale and also validate the molecular kinetic theory through the detailed analysis of the equilibrium jump distance and frequency of the water and CO2 molecules at the solid surfaces. While the MD simulations provide the results of dynamic contact angle at the nanoscale, which can be suitable for the nanopores of the low permeability rock, the dynamic contact angle behaviour at the microscale is also important and investigated in this thesis. This work also develops a coarse-grained molecular dynamic (CGMD) framework to model the liquid-vapour-solid interactions at the microscale. The newly developed CGMD framework has been applied and extended to the study of the dynamic contact angle for the CO2-water-silica system at the microscale. The microscale CGMD simulation of CO2-water-silica system shows that there is an increase in the CO2 contact angle as the increase of the contact line velocity at three different pressures. The dynamic contact angles under a water pressure of 18.9 MPa seem to be slightly larger than those under the water pressures of 9.41 MPa and 14.3 MPa. Moreover, the comparison between the MD and CGMD results suggests that there could be a pore size effect on the dynamic contact angle for the studied CO2-water-silica system.
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Chadil, Mohamed-Amine. "Penalty methods for the simulation of fluid-solid interactions with various assemblies of resolved scale particles." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0205/document.

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Les simulations des écoulements diphasiques à l’échelle réelle de l’application nécessitent des modèles pour les termes non fermés des équations macroscopiques. Des simulations numériques directes à particule résolue utilisant la méthode de pénalisation visqueuse ont été réalisées afin de mesurer les interactions entre des particules de différentes formes (sphérique et ellipsoïdale) et le fluide porteur à différents régimes d'écoulement (de stokes à l'inertiel). Deux méthodes ont été développées durant cette thèse afin d'extraire les forces hydrodynamiques ainsi que le transfert de chaleur sur les frontières immergées représentant les particules. Plusieurs validations ont été conduites pour différentes configurations de particules : de la simulation d’une particule isolée à un réseau aléatoire de sphères en passant par réseau cubique face centrée de sphères. Une corrélation du nombre de Nusselt est proposée pour un sphéroïde allongé plongé dans un écoulement uniforme
The simulations of multiphase flows at real application scale need models for unclosed terms in macroscopic equations. Particle-Resolved Direct Numerical Simulations using Viscous Penalty Method have been carried out to quantify the interactions between particles of different shapes (spheres, ellipsoids) and the carrier fluid at different regimes (from Stokes to inertial). Two methods have been developed to extract hydrodynamic forcesand heat transfers on immersed boundaries representing the particles. Validations have been conducted for various configuration of particles: from an isolated sphere and spheroid to Face-Centered Cubic to a random arrangement of spheres. A correlation of the Nusselt number for an isolated prolate spheroid past by a uniform flow is proposed
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Damiani, Leonardo Hax. "SHPECK : um software de modelagem de especiação geoquímica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/131869.

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Um software de modelagem de especiação geoquímica é responsável pelo cálculo da distribuição das espécies dissolvidas entre solutos e complexos aquosos, e também computar os índices de saturação para diferentes minerais. Neste trabalho nós apresentamos SHPECK, um software desenvolvido para modelar sistemas de equilíbrio geoquímico usando condições de balanço de massa baseadas no conceito da lei de fases (GARRELS; CHRIST, 1965). SHPECK gera um sistema de equações de ação de massa acopladas com restrições de equilíbrio e resolve com a utilização do método se Newton-Raphson. Nosso software aceita qualquer combinação de elementos, espécies e reações, permitindo ao usuário criar diferentes ambientes de simulação e, portanto, controlar qualquet aspecto e configuração do modelo. SHPECK contém uma interface de interação com o usuário e também um banco de dados estruturado que controla todo o gerenciamento dos dados termodinâmicos utilizados para a modelagem geoquímica. Aliado a isso, apresentamos também os conceitos básicos necessários para compreenção da modelagem geoquímica seguida por uma revisão de opções de software disponíveis para modelagem geoquímica. Para finalizar, fizemos uma validação do SHPECK através da modelagem de um sistema de reações diagenéticas observadas em um reservatório asiliclástico e realizamos um estudo comparativo dos resultados do SHPECK com outros software disponíveis. Também para validação, realizamos uma avaliação de tempo de acesso ao banco de dados e pode-se notar um aumento de performance considerável através do uso de um banco de dados relacional comparando-se aos approaches existentes.
A geochemical speciation modeling software is responsible for calculating the distribution of dissolved species between solutes and aqueous complexes, and also computes saturation indexes for different minerals. In this work we introduce SHPECK, a software program developed to model geochemical equilibrium systems using the mass-balance conditions based on the phase rule concept (GARRELS; CHRIST, 1965). SHPECK composes a system of mass-action equations coupled with equilibrium constraints and solve using Newton-Raphson method. Our software accepts any general combination of elements, species, and reactions, allowing the user to create different environments, simulations and, therefore, fully control any aspect and configuration of the model. It provides an interactive user interface as well as the support of a builtfrom- the-ground database structure that handles the management of the whole thermodynamic data used for the geochemical modeling. Also, we present the basic concepts for geochemical modeling followed by a computer science based review about the available geochemical modeling software. Finally, we validate SHPECK by modeling the diagenetic reactions observed in asiliciclastic reservoir and by performing a comparative study with other modelling software package. In addition to this, a database comparison was addressed and the results demonstrate a substantial improvement on the performance by the use of the SHPECK’s relational database comparing to the existent approaches.
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Books on the topic "Multiphase interactions"

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1963-, Inderjit, Dakshini, K. M. M., 1934-, and Foy Chester L, eds. Principles and practices in plant ecology: Allelochemical interactions. Boca Raton, FL: CRC Press, 1999.

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George, Papanicolaou, and University of Minnesota. Institute for Mathematics and its Applications., eds. Hydrodynamic behavior and interacting particle systems. New York: Springer-Verlag, 1987.

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Papanicolaou, G. C. Hydrodynamic Behavior and Interacting Particle Systems. New York, NY: Springer US, 1987.

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International, Workshop on Physical Modelling of Flow and Dispersion Phenomena (2003 Prato Italy). Proceedings of PHYSMOD2003: International Workshop on Physical Modelling of Flow and Dispersion phenomena, 3-5 September 2003, Prato, Italy. Firenze: Firenze University Press, 2003.

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Kolev, Nikolay Ivanov. Multiphase Flow Dynamics 2: Mechanical Interactions. Springer Berlin / Heidelberg, 2014.

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Kolev, Nikolay Ivanov. Multiphase Flow Dynamics 2: Mechanical Interactions. Springer, 2012.

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Kolev, Nikolay Ivanov. Multiphase Flow Dynamics 3: Thermal Interactions. Springer, 2016.

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Kolev, Nikolay Ivanov. Multiphase Flow Dynamics 2: Thermal and Mechanical Interactions. Springer London, Limited, 2005.

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Kolev, Nikolay I. Multiphase Flow Dynamics 2: Thermal and Mechanical Interactions. 3rd ed. Springer, 2007.

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Multiphase Flow Dynamics 2: Thermal and Mechanical Interactions. 2nd ed. Springer, 2004.

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Book chapters on the topic "Multiphase interactions"

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Kolev, Nikolay Ivanov. "Particle-eddy interactions." In Multiphase Flow Dynamics 4, 129–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20749-5_6.

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Kolev, Nikolay I. "Detonation waves caused by chemical reactions or by melt-coolant interactions." In Multiphase Flow Dynamics, 407–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/3-540-69833-7_9.

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Michaelides, Efstathios E., Martin Sommerfeld, and Berend van Wachem. "Particle-Particle Interactions." In Multiphase Flows with Droplets and Particles, Third Edition, 163–203. 3rd ed. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003089278-6.

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Michaelides, Efstathios E., Martin Sommerfeld, and Berend van Wachem. "Particle-Fluid Interactions." In Multiphase Flows with Droplets and Particles, Third Edition, 127–61. 3rd ed. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003089278-5.

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Michaelides, Efstathios E., Martin Sommerfeld, and Berend van Wachem. "Particle-Wall Interactions." In Multiphase Flows with Droplets and Particles, Third Edition, 205–37. 3rd ed. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003089278-7.

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Kataoka, Kazunori, Teruo Okano, Yasuhisa Sakurai, Atsushi Maruyama, and Teiji Tsuruta. "Controlled interactions of cells with multiphase-structured surfaces of block and graft copolymers." In Multiphase Biomedical Materials, 1–19. London: CRC Press, 2021. http://dx.doi.org/10.1201/9780429087592-1.

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Driesner, Thomas, and Sebastian Geiger. "6. Numerical Simulation of Multiphase Fluid Flow in Hydrothermal Systems." In Fluid-Fluid Interactions, edited by Axel Liebscher and Christoph A. Heinrich, 187–212. Berlin, Boston: De Gruyter, 2007. http://dx.doi.org/10.1515/9781501509407-007.

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Kolev, Nikolay Ivanov. "Detonation Waves Caused by Chemical Reactions or by Melt-coolant Interactions." In Multiphase Flow Dynamics 1, 421–61. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15296-7_9.

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Kolev, Nikolay Ivanov. "Detonation waves caused by chemical reactions or by melt-coolant interactions." In Multiphase Flow Dynamics 1, 419–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20605-4_9.

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Cranmer, D. C., and D. J. Speece. "Fiber-Matrix Interactions in Carbon Fiber/Cement Matrix Composites." In Tailoring Multiphase and Composite Ceramics, 609–14. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2233-7_47.

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Conference papers on the topic "Multiphase interactions"

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Ingber, M. S., and P. Vorobieff. "Particle interactions in oscillatory Stokes flow." In MULTIPHASE FLOW 2013. Southampton, UK: WIT Press, 2013. http://dx.doi.org/10.2495/mpf130131.

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Darbeheshti, M., J. Stokan, U. Dam, and M. S. Ingber. "Stochastic interactions of rough particles in viscous shear flow." In MULTIPHASE FLOW 2015. Southampton, UK: WIT Press, 2015. http://dx.doi.org/10.2495/mpf150181.

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Tong, Xiaoling, Edward Luke, Michael Remotigue, and Jian Kang. "Multiphase Simulations of Blast-Soil Interactions." In ASME 2013 Fluids Engineering Division Summer Meeting. ASME, 2013. http://dx.doi.org/10.1115/fedsm2013-16549.

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Ferguson, Frederick, Dehua Feng, and Yang Gao. "Investigating the Unsteady Shock Bubble Multiphase Interactions." In AIAA SCITECH 2022 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-1820.

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Baum, Joseph, Orlando Soto, Fumiya Togashi, and Rainald Lohner. "Numerical Modeling of Multiphase, Multi-Material Blast/Structure Interactions." In 41st AIAA Fluid Dynamics Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-3722.

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Ikeda, Michael K., and Laura A. Schaefer. "Lattice Boltzmann Simulation of Thermal Multiphase Flows With Dynamic Wall Interactions." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87405.

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As energy densities in electronic devices rapidly increase, improved two-phase microchannel heat exchanger designs are of great interest. However, a better understanding of flow boiling in these regimes is required. The lattice Boltzmann method (LBM) has shown great promise in the simulation of multiphase flows due to its ability to easily capture interfacial dynamics. This is in contrast to the complicated interface-tracking algorithms required when applying traditional computational fluid dynamics approaches to multiphase flow problems. However, while there have been many recent development to the standard thermal, multiphase LBM, wall interactions are typically oversimplified. These simplifications lead to interactions which are only appropriate for isothermal, static simulations. In this work, we extend the wall interaction potential based on the pseudopotential multiphase approach to correctly model the variable wetting behavior that occurs with changing temperatures. This will enable the future modeling of the flow boiling process with thermally-influenced wetting characteristics.
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Cooney, Alanna Y., and Van P. Carey. "Modeling Nanobubble Interactions and Behavior Using Multiphase Lattice Boltzman Methods." In ASME 2020 Heat Transfer Summer Conference collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ht2020-9051.

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Abstract A multiphase lattice Boltzmann model is used to explore the presence, evolution, and behavior of nanobubbles. The existence and behavior of nanobubbles has been a recent area of interest since the presence of nanobubbles challenges classical nucleation theory which dictates that bubbles below the critical radius should collapse. Nanobubbles have many areas of interest including cleaning of surfaces, nucleate boiling in microchannels, and nucleation on nanostructured materials. Multiphase Lattice Boltzmann methods (LBM) have been demonstrated to be an effective mesoscale approach to modeling multiphase flows and phase-change processes. These methods provide accurate macroscopic results while accounting for microscopic interactions without invoking an extraordinary computational cost. In this study, an LBM is used to model the evolution of nanobubbles with diameters ranging from 5 to 50 nanometers. LBM results are provided for a variety of real physical conditions that are of interest for exploring nanobubble existence within a nanoporous layer. In addition to the single nanobubble analysis, the effects of bubble interaction with smooth surfaces and within nanostructured surfaces are also presented. The results show that the hydrophilic nature of the surfaces is likely the cause of suppression in the onset of nucleate boiling which is often seen in hydrophilic nanoporous layers. The implications of these results on heat transfer applications including multiphase flows and nucleate boiling in roughened nanostructured surfaces are discussed.
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Peden, J. M., and M. I. Husain. "Visual Investigation of Multiphase Flow and Phase Interactions Within Porous Media." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1985. http://dx.doi.org/10.2118/14307-ms.

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Theofanous, Theo, and Chih-Hao Chang. "On The Computation of Multiphase Interactions in Transonic and Supersonic Flows." In 46th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-1233.

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Maquignon, Nicolas, Julien Duchateau, Gilles Roussel, François Rousselle, and Christophe Renaud. "An improved lattice Boltzmann scheme for multiphase fluid with multi-range interactions." In INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2014 (ICCMSE 2014). AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4897896.

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Reports on the topic "Multiphase interactions"

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Pullammanappallil, Pratap, Haim Kalman, and Jennifer Curtis. Investigation of particulate flow behavior in a continuous, high solids, leach-bed biogasification system. United States Department of Agriculture, January 2015. http://dx.doi.org/10.32747/2015.7600038.bard.

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Recent concerns regarding global warming and energy security have accelerated research and developmental efforts to produce biofuels from agricultural and forestry residues, and energy crops. Anaerobic digestion is a promising process for producing biogas-biofuel from biomass feedstocks. However, there is a need for new reactor designs and operating considerations to process fibrous biomass feedstocks. In this research project, the multiphase flow behavior of biomass particles was investigated. The objective was accomplished through both simulation and experimentation. The simulations included both particle-level and bulk flow simulations. Successful computational fluid dynamics (CFD) simulation of multiphase flow in the digester is dependent on the accuracy of constitutive models which describe (1) the particle phase stress due to particle interactions, (2) the particle phase dissipation due to inelastic interactions between particles and (3) the drag force between the fibres and the digester fluid. Discrete Element Method (DEM) simulations of Homogeneous Cooling Systems (HCS) were used to develop a particle phase dissipation rate model for non-spherical particle systems that was incorporated in a two-fluid CFDmultiphase flow model framework. Two types of frictionless, elongated particle models were compared in the HCS simulations: glued-sphere and true cylinder. A new model for drag for elongated fibres was developed which depends on Reynolds number, solids fraction, and fibre aspect ratio. Schulze shear test results could be used to calibrate particle-particle friction for DEM simulations. Several experimental measurements were taken for biomass particles like olive pulp, orange peels, wheat straw, semolina, and wheat grains. Using a compression tester, the breakage force, breakage energy, yield force, elastic stiffness and Young’s modulus were measured. Measurements were made in a shear tester to determine unconfined yield stress, major principal stress, effective angle of internal friction and internal friction angle. A liquid fludized bed system was used to determine critical velocity of fluidization for these materials. Transport measurements for pneumatic conveying were also assessed. Anaerobic digestion experiments were conducted using orange peel waste, olive pulp and wheat straw. Orange peel waste and olive pulp could be anaerobically digested to produce high methane yields. Wheat straw was not digestible. In a packed bed reactor, anaerobic digestion was not initiated above bulk densities of 100 kg/m³ for peel waste and 75 kg/m³ for olive pulp. Interestingly, after the digestion has been initiated and balanced methanogenesis established, the decomposing biomass could be packed to higher densities and successfully digested. These observations provided useful insights for high throughput reactor designs. Another outcome from this project was the development of low cost devices to measure methane content of biogas for off-line (US$37), field (US$50), and online (US$107) applications.
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Wang, Yifeng. Understanding Multicomponent Multiphase Hydrocarbon Fluid Interaction and Transport in Shale Matrix. Office of Scientific and Technical Information (OSTI), February 2019. http://dx.doi.org/10.2172/1761840.

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Y. Wu, L. Pan, and K. Pruess. A Physically Based Approach for Modeling Multiphase Fracture-Matrix Interaction in Fractured Porous Media. Office of Scientific and Technical Information (OSTI), March 2004. http://dx.doi.org/10.2172/837489.

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