Principle of rigid body and fluid particle interaction

[fishboy82]

Hellow every one:
I have complete my sph fluid solver based on Muller 's paper, it's works just good, But I want to know how fluid particle deal with rigid bodys? Currently I just resolve the contact between the particle and rigid body like a contact constraint.
I resolve the contact just like in the rigid body simulation solver do(use sequential implus),that is calculate impluse matrix,and iteratorly apply impluse between rigid and particle which seems just like the impluse sequence method use in rigid body simulation. I doubt whether it is right to deal with fluid and rigid body in this way,could any one known thins like this tell me ?