Relevant bibliographies by topics / Atural convection in an evaporating liquid

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Academic literature on the topic 'Atural convection in an evaporating liquid'

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Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Atural convection in an evaporating liquid"

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Chandramohan, Aditya, Susmita Dash, Justin A. Weibel, Xuemei Chen, and Suresh V. Garimella. "Marangoni Convection in Evaporating Organic Liquid Droplets on a Nonwetting Substrate." Langmuir 32, no. 19 (May 4, 2016): 4729–35. http://dx.doi.org/10.1021/acs.langmuir.6b00307.

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Lim, Elaine, Yew Mun Hung, and Boon Thong Tan. "A hydrodynamic analysis of thermocapillary convection in evaporating thin liquid films." International Journal of Heat and Mass Transfer 108 (May 2017): 1103–14. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.12.111.

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Kanatani, Kentaro. "Effects of convection and diffusion of the vapour in evaporating liquid films." Journal of Fluid Mechanics 732 (August 30, 2013): 128–49. http://dx.doi.org/10.1017/jfm.2013.393.

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AbstractWe propose a novel model of a pure liquid film evaporating into an inert gas, taking into account an effect of convection of the vapour by the evaporation flow of the gas. For the liquid phase, the long-wave approximation is applied to the governing equations. Assuming that fluctuations of the vapour concentration in the gas phase are localized in the vicinity of the liquid–gas interface, we consider only the limit of the mass transport equation at the interface. The diffusion term in the vertical direction of the mass transport equation is modelled by introducing the concentration boundary layer above the liquid film and solving the stationary convection–diffusion equation for the concentration inside the boundary layer. We investigate the linear stability of a flat film based on our model. The effect of vapour diffusion along the interface mitigates the Marangoni effect for short-wavelength disturbances. The local variation of vertical advection is found to be negligible. A critical thickness above which the film is stable exists under the presence of gravity. The effect of fluctuation of mass loss of the liquid induced by horizontal vapour diffusion becomes the primary instability mechanism in a very thin region. The effects of the resistance of phase change and the time derivative of the interface concentration are also examined.
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Zhi-Qiang, Zhu, and Liu Qiu-Sheng. "Experimental Investigation of Thermocapillary Convection in a Liquid Layer with Evaporating Interface." Chinese Physics Letters 25, no. 11 (October 30, 2008): 4046–49. http://dx.doi.org/10.1088/0256-307x/25/11/057.

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Wang, Tian-Shi, and Wan-Yuan Shi. "Marangoni convection instability in an evaporating droplet deposited on volatile liquid layer." International Journal of Heat and Mass Transfer 171 (June 2021): 121055. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2021.121055.

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Nizovtsev, V. V. "Investigation of natural convection and convection stimulated by local irradiation in a thin layer of evaporating liquid." Journal of Applied Mechanics and Technical Physics 30, no. 1 (1989): 132–39. http://dx.doi.org/10.1007/bf00860717.

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Lyulin, Yu V., A. S. Kreta, and O. A. Kabov. "Effect of gas flow velocity on convection in a horizontal evaporating liquid layer." Thermophysics and Aeromechanics 26, no. 1 (January 2019): 133–38. http://dx.doi.org/10.1134/s086986431901013x.

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Lim, Elaine, and Yew Mun Hung. "Thermophysical phenomena of working fluids of thermocapillary convection in evaporating thin liquid films." International Communications in Heat and Mass Transfer 66 (August 2015): 203–11. http://dx.doi.org/10.1016/j.icheatmasstransfer.2015.06.006.

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Lim, Elaine, and Yew Mun Hung. "Long-wave evolution model of thermocapillary convection in an evaporating thin film of pseudoplastic fluids." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 12 (December 2, 2019): 4764–87. http://dx.doi.org/10.1108/hff-01-2019-0003.

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Purpose By solving a long-wave evolution model numerically for power-law fluids, the authors aim to investigate the hydrodynamic and thermal characteristics of thermocapillary flow in an evaporating thin liquid film of pseudoplastic fluid. Design/methodology/approach The flow reversal attributed to the thermocapillary action is manifestly discernible through the streamline plots. Findings The thermocapillary strength is closely related to the viscosity of the fluid, besides its surface tension. The thermocapillary flow prevails in both Newtonian and pseudoplastic fluids at a large Marangoni number and the thermocapillary effect is more significant in the former. The overestimate in the Newtonian fluid is larger than that in the pseudoplastic fluid, owing to the shear-thinning characteristics of the latter. Originality/value This study provides insights into the essential attributes of the underlying flow characteristics in affecting the thermal behavior of thermocapillary convection in an evaporating thin liquid film of the shear-thinning fluids.
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Kreta, Aleksei, and Yuriy Lyulin. "Convection Study by PIV Method Within Horizontal Liquid Layer Evaporating Into Inert Gas Flow." MATEC Web of Conferences 72 (2016): 01053. http://dx.doi.org/10.1051/matecconf/20167201053.

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Dissertations / Theses on the topic "Atural convection in an evaporating liquid"

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Forestier, Serge. "Etude de l’évaporation d’un liquide répandu au sol suite à la rupture d’un stockage industriel." Thesis, Saint-Etienne, EMSE, 2011. http://www.theses.fr/2011EMSE0625/document.

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Ce travail de thèse s'inscrit dans le cadre d'un projet de recherche entre le CEA et ARMINES (Centre LGEI/ Ecole des Mines d'Alès). Il vise à améliorer la connaissance des mécanismes physiques se produisant lorsque qu’une nappe de liquide (inflammable et/ou toxique stocké à pression atmosphérique) s’évapore suite à la rupture de son stockage. La démarche expérimentale employée consiste à réaliser un plan d'expériences visant à exprimer le débit d'évaporation initial d’une nappe sous différentes conditions initiales de température de liquide et de sol, sous différentes vitesse d’écoulement, de température d’air et selon différentes épaisseurs initiales de liquide. Les différents flux thermiques échangés entre la nappe et son environnement, la température de la nappe et le débit d'évaporation sont mesurés et quantifiés.Les débits d'évaporation expérimentaux sont confrontés à ceux prédits par les différentes corrélations disponibles dans la littérature. Deux analyses de sensibilité sont également réalisées sur ces corrélations et les résultats confrontés à ceux du plan d'expériences afin de vérifier si les corrélations attribuent le même poids aux différents paramètres expérimentaux que le phénomène en lui-même.Les relevés de température dans l'épaisseur de la nappe mettant en évidence la présence de cellules de convection naturelle est également étudiée. Par ailleurs, la température moyenne de la surface est déterminée à partir des différents flux thermiques échangés entre la nappe et son environnement.A l'aide des résultats obtenus, l'étude de plusieurs éléments a été réalisée: l’écart de prédiction sur les résultats des équations bilan thermique et massique selon la température employée pour les incrémenter, la nette différence de température entre la surface et le coeur du liquide, rarement prise en compte dans les modèles théoriques, le rôle prépondérant de la convection naturelle dans le phénomène d'évaporation.Un dernier chapitre étudie la dispersion de la température de surface (phénomène peu étudié dans la littérature) à l'aide d'une caméra thermique. Des zones de températures homogènes apparaissent alors dans le cas de l'essai mettant en oeuvre un écoulement de cavité au-dessus du liquide. La présence de différentes zones de température implique que la cinétique d’évaporation n’est pas uniforme sur la surface de la nappe. A partir de ces résultats, le coefficient de transfert de matière est étudié en fonction de la régression du niveau de liquide dans le bac et conclut à une diminution non modélisée par les corrélations existantes
This work belongs to a research project between CEA and ARMINE (LGEI center/ Ecole des Mines d’Alès). It aims at increasing comprehension of physical mechanism generating when a liquid pool (either flammable or toxic parked under atmospheric pressure) evaporates after loss of containment. An experimental design is realized in order to express some characteristics of evaporation phenomena (initial evaporation rate, steady evaporation rate and duration of unsteady evaporation rate) as a function of initial liquid and soil temperature, wind velocity, air temperature and initial liquid thickness. Heat fluxes exchanged between the pool and its environment are either measure or computed.Experimental evaporation rates are compared to those predicted by correlations available in the literature. Two sensitivity analyses are performed and their results are confronted to those from experimental design. It allows determining if the importance of the different experimental parameters is the same from the correlations to the phenomena itself.Temperature measurements in liquid thickness highlight the presence of natural convection cells. Besides, mean surface temperature is computed from measurements of heat fluxes exchanged between the pool and its environment. From the different results, several points are investigated: the shift between heat and mass balance equations according to the temperature employed to compute them the difference between the liquid bulk and liquid surface temperature, barely taken into account in correlations the noteworthy role of natural convection in the evaporation phenomena.A last chapter studies the surface temperature distribution thanks to an infrared thermometer. Homogeneous temperatures areas appear in the case of cavity flows. The presence of different temperature areas implies that evaporation kinematic in not uniform in the whole surface. From these result the mass transfer coefficient is studied as a function of the step height between the top of the cavity and the liquid surface. It concludes to a mass transfer coefficient decrease non modeled by the different correlations in the literature
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Novak, Vladimir. "Experimental and Numerical Studies of Mist Cooling with Thin Evaporating Subcooled Liquid Films." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10528.

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An experimental and numerical investigation has been conducted to examine steady, internal, nozzle-generated, gas/liquid mist cooling in vertical channels with ultra-thin, evaporating subcooled liquid films. Interest in this research has been motivated by the need for a highly efficient cooling mechanism in high-power lasers for inertial fusion reactor applications. The aim is to quantify the effects of various operating and design parameters, viz. liquid atomization nozzle design (i.e. spray geometry, droplet size distribution, etc.), heat flux, liquid mass fraction, film thickness, carrier gas velocity, temperature, and humidity, injected liquid temperature, gas/liquid combinations, channel geometry, length, and wettability, and flow direction, on mist cooling effectiveness. A fully-instrumented experimental test facility has been designed and constructed. The facility includes three cylindrical and two rectangular electrically-heated test sections with different unheated entry lengths. Water is used as the mist liquid with air, or helium, as the carrier gas. Three types of mist generating nozzles with significantly different spray characteristics are used. Numerous experiments have been conducted; local heat transfer coefficients along the channels are obtained for a wide range of operating conditions. The data indicate that mist cooling can increase the heat transfer coefficient by more than an order of magnitude compared to forced convection using only the carrier gas. The data obtained in this investigation will allow designers of mist-cooled high heat flux engineering systems to predict their performance over a wide range of design and operating parameters. Comparison has been made between the data and predictions of a modified version of the KIVA-3V code, a mechanistic, three-dimensional computer program for internal, transient, dispersed two-phase flow applications. Good agreement has been obtained for downward mist flow at moderate heat fluxes; at high heat fluxes, the code underpredicts the local heat transfer coefficients and does not predict the onset of film rupture. For upward mist flow, the code underpredicts the local heat transfer coefficients and, contrary to experimental observations, predicts early dryout at the test section exit.
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Books on the topic "Atural convection in an evaporating liquid"

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F, Chao David, and NASA Glenn Research Center, eds. Flow visualization in evaporating liquid drops and measurement of dynamic contact angles and spreading rate. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2001.

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Conference papers on the topic "Atural convection in an evaporating liquid"

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Iorio, C. S., and O. A. Kabov. "Influence of Lateral Boundaries on Evaporative-Driven Convection Patterns." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62377.

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The evolution of convective patterns arising in evaporating liquid layers subject to a flow of inert gas depends on dynamical, thermo-physical and geometrical parameters. To the first group it is possible to associate the average velocity of the inert gas current and the total pressure of the gas phase — inert gas and vapor — insisting on the evaporating layer. The volatile liquid is also of importance in the convective patterns selection especially for what concerns the values of the latent heat of evaporation and of the cinematic viscosity. In this paper, we will focus on the influence that the lateral boundaries of the liquid pool have in the pattern selection process from the numerical point of view. A particular emphasis will be given to the heat transfer characteristics and to their dependence from both the liquid layer depth and the size of the evaporating surface.
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Qiu Sheng Liu. "Linear stability Analyses of Convection in Two-layer System with an Evaporating Gas-Liquid Interface." In 54th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.iac-03-j.4.02.

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Pan, Zhenhai, and Hao Wang. "A Numerical Investigation on Micro Particle Dynamics Near an Evaporating Meniscus." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18049.

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Clarifying the particle dynamics near an evaporating meniscus in microfluidics makes great sense in many biological and chemical processes such as analyte enrichment, particle detection and cell position control. In the present work, a numerical model is developed to describe the mass transport and particle dynamics near an evaporating meniscus sustained at the outlet of a micro PDMS tube. The micro flow field is simulated in Computational Fluid Dynamics (CFD) approach. Both the evaporation at the liquid-air interface and the vapor diffusion in air are considered. The convection near meniscus caused by the evaporation and Marangoni effect at interface is presented. Discrete Element Method (DEM) is introduced and coupled to CFD to study the particle dynamics in liquid affected by the convection, the gravity and the buoyancy.
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Li, You-Rong, Bo Lan, Lan Peng, and Ying-Jie Liu. "Numerical Simulation of Self-Induced Thermocapillary Flow for Non-Uniform Evaporating Meniscus in Capillary Tubes." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21147.

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A computational model was developed to describe self-induced thermocapillary convection for non-uniform evaporating meniscus in vertical capillary tubes, which was filled with ethanol, methanol or water. The diameters of capillary tubes ranged from 100 μm to 1000 μm. The direct numerical simulation using control volume approximation was used to investigate the thermocapillary flow in the liquid phase. Three types of distribution of the heat flux along the liquid-vapor meniscus interface were investigated for various Marangoni numbers, to characterize the flow pattern under conditions close to realistic operating parameters. The simulation shows that the flow pattern depends on the thermal boundary condition on the liquid-vapor meniscus interface and the Marangoni number, but is very insensitive to the buoyancy force for thermocapillary convection for non-uniform evaporating meniscus in the capillary tube with the radius ro<500μm.
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Gatapova, Elizaveta, and Oleg Kabov. "The Influence of Evaporation in Shear-Driven Liquid Film on Heat Removal From Local Heater." In ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96235.

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The present work focuses upon shear-driven liquid film evaporative cooling of high heat flux local heater. Thin evaporating liquid films may provide very high heat transfer rates and can be used for cooling of high power microelectronic systems. Thermocapillary convection in a liquid film falling down a locally heated substrate has recently been extensively studied. However, non-uniform heating effects remain only partially understood for shear-driven liquid films. The combined effects of evaporation, thermocapillarity and gas dynamics as well as formation of microscopic adsorbed film have not been studied. The effect of evaporation on heat and mass transfer for 2D joint flow of a liquid film and gas is theoretically and numerically investigated. The convective terms in the energy equations are taken into account. The calculations reveal that evaporation from film surface essential influences on heat removal from local heater. It is shown that the thermal boundary layer plays significant role for cooling local heater by evaporating thin liquid film. Measured by an infrared scanner temperature distribution at the film surface is compared with numerical data. Calculations satisfactorily describe the maximal surface temperature value.
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Schilder, B., S. C. M. Yu, N. Kasagi, S. Hardt, and P. Stephan. "Local Measurement of Forced Convection Heat Transfer in a Micro Glass Tube." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62054.

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The pressure drop and the convective heat transfer characteristics of ethanol and water in a 600 μm diameter tube with and without phase change has been studied experimentally. The test section consists of a glass tube coated with a transparent ITO (indium tin oxide) heater film. For single phase flow it was found that the measured Nusselt numbers and friction factors are in good agreement with the theoretical values expected from Poiseuille flow. Subsequently, the boiling heat transfer of ethanol was studied. It was found that boiling with bubble growth in both upstream and downstream directions leaving behind a thin evaporating liquid film on the tube wall is the dominant phase change process. Local Nusselt numbers are calculated for the two phase flow at different heat fluxes and Reynolds numbers. Compared to single phase flow the heat transfer is enhanced by a factor of 3 to 8.
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Huang, Jianchang, Thomas J. Sheer, and Michael Bailey-McEwan. "Performance of Plate Heat Exchangers Used as Refrigerant Liquid-Overfeed Evaporators." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22095.

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The heat transfer and pressure drop characteristics of plate heat exchangers were measured, when used as refrigerant liquid over-feed evaporators. The three units all had 24 plates but with different chevron-angle combinations of 28°/28°, 28°/60°, and 60°/60°. R134a flowing upwards was used as the refrigerant, in a counter-current arrangement with water flowing on the other side. Heat transfer and pressure drop measurements were made over a range of mass flux, heat flux and corresponding outlet vapour fractions. The effect of system pressure on the evaporator performance was not evaluated due to the small range of evaporating temperature. Experimental data were reduced to obtain the refrigerant-side heat transfer coefficient and frictional pressure drop. The results for heat transfer showed a strong dependence on heat flux and weak dependence on mass flux and vapour fraction. Furthermore, the chevron angle had a small influence on heat transfer but a large influence on frictional pressure drops. Along with observations that were obtained previously on large ammonia and R12 plate evaporators, it is concluded that the dominating heat transfer mechanism in this type of evaporator is nucleate-boiling rather than forced convection. For the two-phase friction factor, various established methods were evaluated; the homogeneous treatment gives good agreement.
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Ranjan, Ram, Jayathi Y. Murthy, and Suresh V. Garimella. "Numerical Study of Evaporation Heat Transfer From the Liquid-Vapor Interface in Wick Microstructures." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11326.

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A numerical model of the evaporating liquid meniscus under saturated vapor conditions in wick microstructures has been developed. Four different wick geometries representing the common wicks used in heat pipes, viz., wire mesh, rectangular grooves, sintered wicks and vertical microwires, are modeled and compared for evaporative performance. The solid-liquid combination considered is copper-water. Steady evaporation is modeled and the liquid-vapor interface shape is assumed to be static during evaporation. Liquid-vapor interface shapes in different geometries are obtained by solving the Young-Laplace equation using Surface Evolver. Mass, momentum and energy equations are solved numerically in the liquid domain, with the vapor assumed to be saturated. Evaporation at the interface is modeled by using appropriate heat and mass transfer rates obtained from kinetic theory. Thermo-capillary convection due to non-isothermal conditions at the interface is modeled for all geometries and its role in heat transfer enhancement from the interface is quantified for both low and high superheats. More than 80% of the evaporation heat transfer is noted to occur from the thin-film region of the liquid meniscus. Very small Capillary and Weber numbers arising due to small fluid velocities near the interface for low superheats validate the assumption of static liquid meniscus shape during evaporation. Solid-liquid contact angle, wick porosity, solid-vapor superheat and liquid level in the wick pore are varied to study their effects on evaporation from the liquid meniscus.
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Magnini, Mirco, and John R. Thome. "Use of Two-Phase CFD Simulations to Develop a Boiling Heat Transfer Prediction Method for Slug Flow Within Microchannels." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48033.

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This work presents a new boiling heat transfer prediction method for slug flow within microchannels, which is developed and benchmarked against the results of two-phase CFD simulations. The proposed method adopts a two-zone decomposition of the flow for the sequential passage of a liquid slug and an evaporating elongated bubble. The heat transfer is modeled by assuming transient heat conduction across the liquid film surrounding an elongated bubble and sequential conduction/convection within the liquid slug. Embedded submodels for estimating important flow parameters, e.g. bubble velocity and liquid film thickness, are implemented as “building blocks”, thus making the entire modeling framework totally stand-alone. The CFD simulations are performed by utilizing ANSYS Fluent v. 14.5 and the interface between the vapor and liquid phases is captured by the built-in Volume Of Fluid algorithm. Improved schemes to compute the surface tension force and the phase change due to evaporation are implemented by means of self-developed functions. The comparison with the CFD results shows that the proposed method emulates well the bubble dynamics during evaporation, and predicts accurately the time-averaged heat transfer coefficients during the initial transient regime and the terminal steady-periodic stages of the flow.
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Pan, Zhenhai, Susmita Dash, Justin A. Weibel, and Suresh V. Garimella. "Numerical Study of Water Droplet Evaporation on a Superhydrophobic Surface." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17697.

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A comprehensive numerical model is developed to predict evaporation of a water droplet from an unheated superhydrophobic substrate. Analytical models that only consider vapor diffusion in the gas domain, and assume the system to be isothermal, over-predict the evaporation rates by ∼25% compared to experiments conducted on such surfaces. The current model solves for conjugate heat and mass transfer in the solid substrate, liquid droplet, and surrounding gas. Evaporative cooling of the interface is accounted for, and vapor concentration is coupled to local temperature at the interface. Buoyancy-driven convective flows in the droplet and vapor domains are also simulated. A droplet evaporating in a constant-contact-angle mode with an initial volume of 3 μl and contact angle of 160 deg is considered at an ambient temperature of 21°C and 29% relative humidity, to match conditions of related experiments. The interface cooling effect suppresses the evaporation rate significantly; however, natural convection in the gas and liquid domains has a negligible impact on the evaporation rate. The local evaporation flux along the droplet interface predicted by the model is compared to that predicted by an analytical diffusion-based model. The numerically calculated total evaporation rate agrees with experimental results to within 2%. The large deviations between past analytical models and the experimental data on superhydrophobic surfaces are reconciled.
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