engleski

Analysis Of Lubricated Point Contacts Using The Finite Area Method

Various enhancements for an Arbitrary Lagrangian-Eulerian (ALE) Interface-Tracking method are presented for the simulation of two-phase flow of Newtonian incompressible fluids separated by sharp capillary interfaces. The methodology is based on the work of Tukovic ́ and Jasak. The two-phase Navier-Stokes equations in two-field formulation are solved in coupled manner using collocated finite volume method (FVM) on two unstructured moving meshes of general topology. To this end, in order to consistently enforce the jump and transmission conditions at the fluid interface, we have developed a partitioned coupling approach through an iterative Dirichlet-Neumann algorithm. For a stable and convergent procedure, coupled boundary conditions are devised deploying the finite area method (FAM) provided in FOAM-extend. Mesh-skewness errors resulting from significant interface deformation are corrected for in a second-order fashion. Interpolation between interfacial boundary patches is accomplished by means of General-Grid-Interface (GGI) interpolation. This contribution will further detail on the concept of a unified framework for both partitioned and monolithic coupling using the FOAM-extend C++ library. Validation is accomplished for a selection of test cases for capillarity-dominated two-phase flow.

Multiphase flow, Finite volume method, ALE Interface tracking, Dirichlet-Neumann coupling, FOAM-extend C++

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