MRT model: external force

Hello everybody :slight_smile:
I found in some papers the algoritm of the MRT model (in general case).Otherwise, when we have an acting external force we need to update moments. Could you give an algorithm to this problem, you can choose a test case (with external force such as poiseuille case or buoyancy force,…) if you want.
Thank You.

i am doing the same thing and i try to introduce the external force in the MRT moel but it does not work, for the moment
if you want to have an idea a bout MRT model in PALABOS you can see the example of navierStokesModels