Abstract
This paper proposes an evaluation method of surface tension without using curvature of interface. Curvature of interface is needed to evaluate surface tension in the existing methods such as CSF model. However, stable evaluation of curvature requires finite region of interface between fluids which prevents efficient simulation of violated multi phase flow with large numbers of bubbles and droplets. The objective of the proposed methods is efficient surface tension modeling which enables simulation of highly violated air-water flow with minor number of computational cells. The proposed model directly evaluates surface tension from cross line between cell boundary and interface and does not require finite width of interface region. Two and three dimensional test cases are carried out to confirm that the method provides qualitatively appropriate results.
