改良SOLA法による断熱二流体モデルの数値解法 : 第2報, 相遷移の取扱い方と数値計算例

抄録

In the first report of the present study, a numerical solution method for an adiabatic two-fluid model was developed based on the modified SOLA (Solution Algorithm) method. In this second report, a numerical treatment is discussed for the case when a phase occupying a computational cell is changed with time from single phase to two-phase or vice versa, which is defined as a phase transition. In addition, the numerical method with a treatment for the phase transition is applied to a numerical benchmark problem. The problem is to calculate two-dimensional sedimentation due to gravitational force. The problem is suitable to discuss the numerical method for an adiabatic two-fluid model including the treatment for the phase transition. The calculated results are qualitatively well understood, and therefore, it is confirmed that the present method is applicable to the transient two-phase flow analyses including the phase transition.