I want to simulate a simple porous media with water running through. However, water has some particles of various radii. I have checked out some methods which are implemented in OpenlB for simulating porous media. But I don’t have any information about simulating particles. (flow is steady and quite simple – The geometry is quite complicated but I am planning to use an STL file for that part.) I know that there is a bifurcation3d with an STL file as an example. I wanted to know how I can combine the two in OpenLB. If there are certain resources to suggest to help me along the way, it would be greatly appreciated.