BELA electrostatic force calc

["iaaeinc" <iaaeinc@xxxxxxxxx>]

I have a question about the BELA electrostatic force calculation of 
the conductor dielectric analysis. If you want to get the effective 
pressure/force due to the surface charge in the electrostastic field, 
isn't that should be computed from the Maxwell stress equation 
integrated on the conductor surface only ? The manual says you should 
do the line integral away from the surface (If you do so, the there 
is no charge in the outer dielectric media ?). Also, the equation 
does not seems to be correct

df = 0.5(D(H*n)+H(D*n)-(D*E)n))

Shouldn't that be the integral of Tij*n on the conductor surface 
(line integral)? Tij is the Maxwell stress tensor from the D,E,H,B.

thanks

ted