陰的界面表現法と等値面再構成法を組み合わせた混相流シミュレーション手法(流体工学,流体機械)

概要

論文の詳細を見る
An implicit interface method and a level contour reconstruction method (LCRM) are coupled for stable simulation of multiphase flow largely affected by surface tension. For surface tension evaluation, three representations, namely, basic phase indicator function for interface tracking, surface element, and reconstructed indicator function by the LCRM, are combined in four ways. By a drop simulation under the condition of non-gravity and inviscid, the four proposed evaluation methods are compared and evaluated. By the method using the curvature calculated by the surface elements and the gradient of the reconstructed indicator function, rotation of surface tension force acts to suppress development of parasitic currents in connection with production of curvature gradient by small shape change. Thus, by this method, stable flow field can be obtained within the characteristic time scale. Furthermore, numerical results show that the proposed method can reproduce the stable flow field containing an air bubble in oil with large effect of surface tension.
社団法人日本機械学会の論文
2009-10-25