Hi everyone:

I am new in UDF. I wanna add the Van der Waals force between two droplet while they are moving through a constricted capillary tube. But there are some questions confused me.

I choose the VOF model to define the dispersed phase(droplet) and the continuous phase (drop suspended in). I wonder how to identify the distance between the two droplets surface? (The Van der Waals force is function of the distance between two droplets).

Has anyone done solved the same problem? If possible, could you sent me a UDF code or give me some detailed advice? Thank you very much!!!

hellow friend i also doingsame analysis if u get any information plz forward me.