NUMERICAL SIMULATION OF ISOTHERMAL AND THERMAL TWO-PHASE FLOWS USING PHASE-FIELD MODELING

Naoki Takada () and Akio Tomiyama ()
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Naoki Takada: National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1, Namiki, Tsukuba, Ibaraki 305-8564, Japan
Akio Tomiyama: Graduate School of Science and Technology, Kobe University, 1-1, Rokkodui-cho, Nada, Kobe, Hyogo 657-8501, Japan

International Journal of Modern Physics C (IJMPC), 2007, vol. 18, issue 04, 536-545

Abstract: For interface-tracking simulation of two-phase flows in various micro-fluidics devices, we examined the applicability of two versions of computational fluid dynamics method, NS-PFM, combining Navier-Stokes equations with phase-field modeling for interface based on the van der Waals-Cahn-Hilliard free-energy theory. Through the numerical simulations, the following major findings were obtained: (1) The first version of NS-PFM gives good predictions of interfacial shapes and motions in an incompressible, isothermal two-phase fluid with high density ratio on solid surface with heterogeneous wettability. (2) The second version successfully captures liquid-vapor motions with heat and mass transfer across interfaces in phase change of a non-ideal fluid around the critical point.

Keywords: Computational fluid dynamics; wettability; contact line; phase change; diffuse-interface method; 47.11.-j; 47.10.ad; 47.11.Bc; 47.55.Ca; 47.55.D-; 47.55.df; 47.55.N- (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0129183107010772

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