Simulation of liquid–vapour phase transitions and multiphase flows by an improved lattice Boltzmann model
| Autor: | Chen Yang, Hangxing He |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Work (thermodynamics)
Phase transition Computer simulation Mechanical Engineering Flow (psychology) Computational Mechanics Lattice Boltzmann methods Energy Engineering and Power Technology Aerospace Engineering Mechanics Condensed Matter Physics Physics::Fluid Dynamics Contact angle Mechanics of Materials Statistical physics Wetting Spurious relationship Mathematics |
| Zdroj: | International Journal of Computational Fluid Dynamics. 29:423-433 |
| ISSN: | 1029-0257 1061-8562 |
| DOI: | 10.1080/10618562.2015.1119268 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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