Calculating the curvature of an interface in VOF model
Does anyone have any idea about how to calculate the curvature of an interface between two phases while using the VOF model? There are a few algorithms out there but they are not very clear. For example, the young's algorithm, the height function algorithm. In which we have to calculate Delta(x) and Delta(y) and access the volume fractions of nearby cells. I have trouble in doing both.
Can you help me calculating the Delta (x) and Delta(y) (basically the grid spacing) and how to use the C_VOF of nearby cells?