An unstructured-grid numerical model for interfacial multiphase fluids based on multi-moment finite volume formulation and THINC method

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• 作者：Bin Xie ; ^{xie.b.aa@m.titech.ac.jp} ; Peng Jin ; Feng Xiao ; ^{xiao@es.titech.ac.jp}
• 关键词：Finite volume method ; Unstructured hybrid grid ; Incompressible multi-phase flow ; Multi-moment ; Interface capturing ; Complex geometry
• 刊名：International Journal of Multiphase Flow
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：89
• 期：Complete
• 页码：375-398
• 全文大小：6972 K
• 卷排序：89

文摘

Unstructured multi-dimensional tangent of hyperbola interface capturing (UMTHINC) scheme has been extended to hybrid arbitrary unstructured grids to capture moving interface with significantly improved solution quality. A reliable numerical model on hybrid arbitrary unstructured grids for interfacial multiphase fluid has been constructed by combining volume-average/ point-value multi-moment (VPM) method with the UMTHINC scheme. Adding the point values of velocity at the cell vertices substantially enhances the accuracy and robustness of numerical solutions. State-of-art techniques, such as the consistent formulation of mass and momentum transport for large density ratio and the pressure projection method with balanced-force model for surface tension force, are integrated to the present model to facilitate real-case application. The present model has been verified by benchmark tests, which reveals that the present numerical model provides adequate accuracy and robustness in simulating interfacial multiphase flows with complex geometry.