drop fall velocity

ozgur

Hi,

I want to calculate the falling velocity of my drop in 3D VOF model. So far, I've created an iso-surface of volume frac. on the drop, and use surface integral panel to calculate the area-weighted average of Y velocity (the vertical coordinate) over the iso-surface. To be more accurate, I want to use volume integral panel, and do the same averaging over the complete drop volume. The problem is, there is no way to select particulary the volume of my drop, so that I can calculate an average over the all cells in my drop. I can only select the complete fluid zone in my domain. Does anyone have an idea how to fix this?

Thanks in advance