cannot find actual film/dimple radius

[Sujith A L]

I am struggling to find a way to estimate the film/dimple radius when the droplets form dimple when they are colliding. 

I also tried performing dx/dy = 0 and extracting the y max value, which is not properly working for me
and the below mentioned r_w_z_min.c extracts the actual y value recorded in the interface file, which gives the y max value which is lesser than actual dimple radius as u can see in the picture given below (the zoomed interfaces of 2 droplets colliding). But the actual dimple radius is greater.

please kindly help me track the actual dimple radius

thank you