非スタガード有限体積法による気液二相流の多次元数値解析 : 第1報, 改良VOF法による界面挙動の三次元解析

概要

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Numerical method for gas-liquid two-phase flow is of quite importance in nuclear/oil power plants and chemical plants for estimation of plant performance and components design. While macroscopic one-dimensional calculations are widely used, detailed three dimensional simulation is being expected for considering microscopic mechanism. The present three dimensional program using an improved VOF method has been developed. This method enables high accurate and stable interface calculation in spite of large density ratio between the phases, because non-staggered finite volume method, which is suitable for treatment of discontinuity, and minimum numerical diffusion is adopted. The program was applied to fundamental microscopic phenomena, i.e.coalescence of bubbles and collision of droplets. The plausible results showed the program is able to simulate collective motion of bubbles and droplets with interactions among them with small finite volume number and time steps. The present method is hopefully applicable to direct calculation of two phase flow in every flow pattern.
社団法人日本機械学会の論文
2000-07-25