Surface tension force expression at the wall in fluent
 

Hi all,
I was trying to derive the expression for surface tension force at the wall with dynamic contact angle prescribed. As said in the fluent manual the general expression for surface tension force is:


http://cdlab2.fluid.tuwien.ac.at/LEH...g/img11196.gif

where ,
http://cdlab2.fluid.tuwien.ac.at/LEH...g/img11191.gif.
Now at the wall when contact angle is prescribed the manual says that normal is calculated as follows:
http://cdlab2.fluid.tuwien.ac.at/LEH...g/img11208.gif
Putting this in the expression for curvature what is the final expression for the volumetric force???
Please help
Regards,
Indrajit