I have a short question about how the surface tension is specified in the solver. Why is the case that in the Scriven wedge case, where gradAlpha is used, the value of sigma is 0 (left side of screenshot) and where RDF is used in 3D Scriven the value of sigma is 100 times lower than the physical value? The way the surface tension force is computed doesn't suggest to me why this should be, so presumably I'm missing something.
I have a short question about how the surface tension is specified in the solver. Why is the case that in the Scriven wedge case, where gradAlpha is used, the value of sigma is 0 (left side of screenshot) and where RDF is used in 3D Scriven the value of sigma is 100 times lower than the physical value? The way the surface tension force is computed doesn't suggest to me why this should be, so presumably I'm missing something.