Sharp界面モデルを用いた相変化を伴う気液二相流れの数値解析(流体工学,流体機械)

概要

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A numerical method based on the sharp interface assumption is presented for simulating two-phase flows with phase change. In this method, the ghost fluid method is used to handle boundary conditions imposed at liquid-gas interfaces, including pressure jump conditions due to surface tension and velocity jump conditions due to phase change. Also, the ghost fluid method is applied to boundary conditions imposed at solid walls. A novel treatment for contact lines on solid surface with arbitrary shape is proposed. With these methods combined together, two-phase flows in arbitrary geometry can be simulated successfully. As a demonstration of the capability of the present method, numerical results of a Stefan problem of evapolation and two analyses related to single bubble behavior during nucleate boiling are described.
2010-11-25