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A modified phase change pseudopotential lattice Boltzmann model

Gong, W.; Yan, Y.Y.; Chen, S.; Wright, E.

Authors

W. Gong

YUYING YAN YUYING.YAN@NOTTINGHAM.AC.UK
Professor of Thermofluids Engineering

S. Chen

E. Wright



Abstract

Amongst all the multiphase models in the lattice Boltzmann (LB) community, the pseudopotential model has been the most popular approach due to its simplicity and high-efficiency. Recently a number of liquid-vapour phase change models were also proposed based on the pseudopotential LB model. Our study finds that most of the published pseudopotential phase change models rely on an entropy-based energy equation, while the entropy-based energy equation is derived with the equation of state of ideal gas. That means this entropy-based energy equation is not completely suitable for multiphase ow which applies non-ideal equation of state for the phase separation simulation. Therefore a new phase change LB model is proposed in this work, where an improved pseudopotential multiphase model (Li et al., 2013) and a modified energy equation which is solved in the classical fourth-order Runge-Kutta scheme are coupled in a hybrid scheme. The results show that the numerical simulation can capture the basic liquid-vapour phase change features. The D2 law for droplet evaporation is validated and the square of diameter variation is in good agreement with experimental data. Moreover, the three boiling stages (nucleate boiling, transition boiling and film boiling) are accomplished using the modified model, and the corresponding transient heat fluxes are presented.

Journal Article Type Article
Acceptance Date Apr 19, 2018
Online Publication Date Apr 24, 2018
Publication Date 2018-10
Deposit Date Apr 23, 2018
Publicly Available Date Apr 25, 2019
Journal International Journal of Heat and Mass Transfer
Print ISSN 0017-9310
Electronic ISSN 0017-9310
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 125
Pages 323-329
DOI https://doi.org/10.1016/j.ijheatmasstransfer.2018.04.090
Keywords Pseudopotential lattice Boltzmann, phase change, energy equation
Public URL https://nottingham-repository.worktribe.com/output/950251
Publisher URL https://www.sciencedirect.com/science/article/pii/S0017931018307026

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