[aday]

Hi,

I am attempting to track a gas-water interface and obtain the normal to the interface. I am thinking that I could use the density gradient as this gives me the correct direction, however I am using a pressure based solver and therefore do not have access to this value.

I am wondering if anyone has any suggestions to obtain this normal direction either through computing a density gradient myself (maybe with C_UDSI?) or by computing something like a gradient of the VOF of fluid.

Thanks,
Alex