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For multiphase flow simulations, accurate evaluation of interfacial tension is an important issue, so a front-tracking method which tracks the interface explicitly by marker elements is expected to be very useful. In the front-tracking method, however, treating the elements in 3D space is very tedious. To eliminate this problem, a front-tracking method without connectivity called level contour reconstruction method (LCRM) has been developed. However, the volume conservation property of the method is not so good. In this study, three techniques in reconstruction process of the LCRM are proposed and evaluated for several curvature spheres. As the result, the proposed method shows very high volume conservation property even for 2-grid diameter sphere. And also shape of a single deformable bubble and merging of two bubbles are reasonably expressed.

Numerical Simulation of Multiphase Flows by Level Contour Reconstruction Method (Improvement of Volume Conservation Property)