10504 マイクロ流体デバイスのための拡散界面モデルを用いた二相流体挙動の数値シミュレーション(産学における混相研究(1),OS.13 産学における混相研究)

概要

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A numerical method adopting a diffuse-interface model (DIM) is applied to interface-tracking simulation of microscopic incompressible two-phase flows with a high density ratio on a solid surface. The DIM is based on the free-energy approach. In the flows, the physical properties vary steeply but continuously across a finite volumetric zone, which is assumed as a fluid-fluid interface between the phases. The wettability of a solid surface is taken into account through a simple boundary condition derived from the increase in free energy on the surface. The DIM approach simplifies the capture of motions of a fluid interface on the surface (contact line). The method solves a set of the Navier-Stokes equations and an advection-diffusion equation for the fluid volume and interface. The numerical results of two- and three-dimensional static and dynamic contact-line problems prove that the DIM-based method can be employed for simulating the two-phase flows in MEMS-device manufacturing processes.
社団法人日本機械学会の論文
2009-03-05