Volume of fluid-based numerical modeling of condensation heat transfer and fluid flow characteristics in microchannels

Ganapathy, Harish; Shooshtari, Amir; Choo, Kyosung; Dessiatoun, Serguei; Alshehhi, Mohamed; Ohadi, Michael M.

doi:10.1016/j.ijheatmasstransfer.2013.05.044

Cited by 141 publications

(40 citation statements)

References 76 publications

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“…Nowadays, with the development of computer equipment and numerical methods, the numerical methods to study condensation are increasingly drawing investigators’ attention. A transient, two‐dimensional numerical work conducted by Ganapathy et al using the volume of fluid (VOF) method showed a reasonable agreement with the experimental work. Chen et al simulated the condensing flow of FC72 inside a rectangular micro‐channel.…”

Section: Introductionmentioning

confidence: 60%

Numerical study on heat transfer and pressure drop characteristics of R410A condensation in horizontal circular mini/micro‐tubes

Zhang

2016

Can J Chem Eng

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Heat transfer and pressure drop characteristics of condensation for R410A inside horizontal circular tubes with inner diameters ranging from 0.25–4 mm were investigated numerically. The effects of mass flux, vapour quality, tube diameters, and gravity on heat transfer and pressure drop characteristics were discussed. Liquid‐vapour interfaces and stream‐traces were also presented to give a better understanding of these effects on the condensing flow. Numerical heat transfer coefficients and pressure gradients fitted well with the empirical correlations. The results indicate that local heat transfer coefficients and pressure drop increase with increasing mass flux, vapour quality, and with decreasing tube diameters. A thin liquid film is formed at the upper part of the tube in mini‐channels, while a symmetrical annular flow is observed in microchannels. A vortex with its core lying at the bottom of the tube is formed in the tubes with an inner diameter of 4 mm, while the stream‐traces start from the z‐axis and point to the liquid‐vapour interface when dh is 0.25 mm. The gravity effect on heat transfer is important in larger tubes at lower vapour quality, where stratified flow may occur.

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Section: Introductionmentioning

confidence: 60%

Numerical study on heat transfer and pressure drop characteristics of R410A condensation in horizontal circular mini/micro‐tubes

Zhang

2016

Can J Chem Eng

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“…When optimally designed, the inherently higher surface area to volume ratio of these systems substantially enhances heat and mass transfer performance, while keeping the pressure drop at moderate levels [57,58]. Microreactors, if successfully applied to gas-liquid absorption processes, can offer significant reductions in the cost and footprint of carbon capture systems.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes

Ganapathy

Shooshtari

Dessiatoun

et al. 2015

Chemical Engineering Journal

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“…As the standard VOF method does not cover the phase change, researchers have explored different ways to determine the mass and heat transfers during condensation [6,7,12,13,[24][25][26][27][28]. Among these phase change models, a relatively simple and efficient method described below has been employed:…”

Section: Phase Change Modelmentioning

confidence: 99%

“…et al[6] developed a numerical model for the simulation of condensation heat transfer and fluid flow characteristics in a single microchannel based on the…”

mentioning

confidence: 99%

Numerical Simulation of Laminar Film Condensation in a Horizontal Minitube with and Without Non-Condensable Gas by the VOF Method

Yin

Guo

Sundén

et al. 2015

Numerical Heat Transfer, Part A: Applications

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Based on the volume of fluid (VOF) method, a steady three-dimensional numerical simulation of laminar film condensation of water vapor in a horizontal minitube, with and without non-condensable gas, has been conducted. A user-defined function defining the phase change is interpreted and the interface temperature is correspondingly assumed to be the saturation temperature. An annular flow pattern is to be expected according to a generally accepted flow regime map. The heat-transfer coefficient increases with higher saturation temperature and a smaller temperature difference between the saturation and wall temperatures, but varies little with different mass flux and degree of superheat. The existence of a non-condensable gas will lead to the generation of a gas layer between vapor and liquid, resulting in a lower mass-transfer rate near the interface and higher vapor quality at the outlet. In consequence, the heat-transfer coefficient of condensation with a non-condensable gas drops sharply compared with that of pure vapor condensation. Meanwhile, the non-condensable gas with a smaller thermal conductivity would cause a stronger negative effect on heat flux as a result of a higher thermal resistance of heat conduction in the non-condensable gas layer.

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Volume of fluid-based numerical modeling of condensation heat transfer and fluid flow characteristics in microchannels

Cited by 141 publications

References 76 publications

Numerical study on heat transfer and pressure drop characteristics of R410A condensation in horizontal circular mini/micro‐tubes

Numerical study on heat transfer and pressure drop characteristics of R410A condensation in horizontal circular mini/micro‐tubes

Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes

Numerical Simulation of Laminar Film Condensation in a Horizontal Minitube with and Without Non-Condensable Gas by the VOF Method

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