曲率を用いた界面移動法による過熱液中の気泡成長の数値解析

概要

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An interface tracking method is proposed which approximate surface geometry with polynomial expression using surface location, normal vector and curvature at surface point. In this method, a pressure difference caused by surface tension is easily calculated because normal vector and curvature are known. Using this method, the movement of a single sphere in an oblique direction has been simulated successfully with keeping its original shape. From the results of sphere crushing, this method can be applied to various interfacial phenomena with the separation and coalescence of surface. Furthermore, this method is applied to the phase change problems. In the calculation of ice ball growth, ice ball grows keeping spherical shape. In the calculation of bubble growth, bubble deformed its shape because of error in curvature. In order to avoid the error in curvature, the surface has to be smoothed using adjacent surface point.
富山高等専門学校の論文