Calculating distance betwee particles and air-water interfaces (bubbles)
 

Hello all,

I am trying to implement a hydrophobic force in a coupled solver of multiphaseEulerFoam and basic kinematicColliding cloud ( I have coupled multiphaseEulerFoam and basickinematic colliding cloud). Now according to literature, there exist a relation between hydrophobic force and a separation distance between the bubble and particle (H) as given below:

Fh=KRp exp(-H/lambda)nhat
Where Fh is the hydrophobic force, Rp is particle dia, H is the particle bubble distance , lambda is the decay length and nhat is the unit vector.

Now, in order to calculate Fh, the particle bubble distance (H) needs to be calculated.

In the simulation there are thousands of particles moving in random directions along with dynamically evolving bubbles. In multiphase flow we specify the bubbles by the interface where 0<alpha<1, alpha being the volume fraction.
Now, is there any way to track the distance bewteen the particles and the interface to implement the hydrophobic force?
Anu help would be appreciated.

Regards
Vivek