Hasta La Motion!

Dynamics question for ya’ll. I have two objects, one that passes through another. The stationary object has a 3D Container around it and the object is a surface emitter for fluids. I was wondering if there is a way for the the object to emit fluids only on collision with the other object? Also I would hope it could be based on vertices or maybe face normals or something so that when only parts of the object that are touching the other object would emit the fluids.

Any ideas?

Thanks in advance.