Pseudopotential-based discrete unified gas kinetic scheme for modeling multiphase fluid flows

作     者：Zeren Yang Sha Liu Congshan Zhuo Chengwen Zhong 

作者机构：School of AeronauticsNorthwestern Polytechnical University127 West Youyi Road710072Xi’anChina National Key Laboratory of Science and Technology on Aerodynamic Design and ResearchNorthwestern Polytechnical University127 West Youyi Road710072Xi’anChina 

出 版 物：《Advances in Aerodynamics》 (空气动力学进展（英文）)

年 卷 期：2022年第4卷第1期

页      面：662-687页

核心收录：

学科分类：07[理学] 0703[理学-化学] 0701[理学-数学] 0702[理学-物理学] 070101[理学-基础数学] 

基　　金：National Numerical Wind Tunnel Project,the National Natural Science Foundation of China(No.11902266,11902264,12072283) 111 Project of China(B17037) 

主　　题：Pseudopotential model Discrete unified gas kinetic scheme Multiphase flows Isotropic interface 

摘      要：To directly incorporate the intermolecular interaction effects into the discrete unified gas-kinetic scheme(DUGKS)for simulations of multiphase fluid flow,we developed a pseudopotential-based DUGKS by coupling the pseudopotential model that mimics the intermolecular interaction into *** to the flux reconstruction procedure,additional terms that break the isotropic requirements of the pseudopotential model will be *** eliminate the influences of nonisotropic terms,the expression of equilibrium distribution functions is reformulated in a moment-based *** the isotropy-preserving parameter appropriately tuned,the nonisotropic effects can be properly canceled *** fundamental capabilities are validated by the flat interface test and the quiescent droplet *** has been proved that the proposed pseudopotential-based DUGKS managed to produce and maintain isotropic *** isotropy-preserving property of pseudopotential-based DUGKS in transient conditions is further confirmed by the spinodal *** superiority of the pseudopotential-based DUGKS over the lattice Boltzmann method is also demonstrated by predicting the coexistence densities complying with the van der Waals equation of *** directly incorporating the intermolecular interactions,the pseudopotential-based DUGKS offers a mesoscopic perspective of understanding multiphase behaviors,which could help gain fresh insights into multiphase fluid flow.