Simulation of liquid-vapour phase transitions and multiphase flows by an improved lattice Boltzmann model

An improved lattice Boltzmann (LB) model with a new scheme for the interparticle interaction force term is proposed in this paper. Based on the improved LB model, the equation-free method is implemented for simulating liquid-vapour phase change and multiphase flows. The details of phase separation a...

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Bibliographic Details
Published in:International journal of computational fluid dynamics 2015-10, Vol.29 (9-10), p.423-433
Main Authors: Yang, Chen, He, Hangxing
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Computer simulation
equation-free method
lattice Boltzmann method
Lattices
Mathematical models
multi-scale simulation
Multiphase flow
multiphase flows
Phase change
Phase separation
Solid surfaces
wettability
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Summary:An improved lattice Boltzmann (LB) model with a new scheme for the interparticle interaction force term is proposed in this paper. Based on the improved LB model, the equation-free method is implemented for simulating liquid-vapour phase change and multiphase flows. The details of phase separation are presented by numerical simulation results in terms of coexistence curves and spurious currents. Compared with existing models, the proposed model can give more accurate results in a wider temperature range with the spurious currents reduced and less time consumed. Characteristics of phase separation can be quickly and accurately reflected by the proposed method. Then, the contact angle of the solid surface is numerically investigated based on the proposed model. The proposed model is valid for steady flow with near zero velocity; unsteady cases will be investigated in further studies. This work will be helpful for our long-term aim of multi-scale modelling of convective boiling.
ISSN:1061-8562
1029-0257
DOI:10.1080/10618562.2015.1119268