export a position contour on a surface for tracked particles
 

hi All.

I am doing a transient simulation with particle tracking. all imposed particles are starting from the INLET (INLET1+INLET2), and now i want to draw the contour plot of the positions of particles from INLET1 on a given surface. I know how to track the particles from INLET1. However, I do not know how to get the cross point of the particles and a given surface.

any suggestion?

thanks in advance

shuai