[ESPResSo-users] Multi-realaxation time model

[Wink, Markus]

Dear ESPResSo users and developers,

 

I have a question concerning the MRT Lattice Boltzmann model used in ESPResSo. In MRT the linearized collision operator is transformed to momentum space via the collision matrix M. I have found the collision matrix in the file lb-d3q19.hpp.

But I didn’t find the relaxation parameters.

 

Shouldn’t there be some kind of diagonal matrix S containing the relaxation rates for the different moments?

Does anybody know where I can find them or tell me which relaxation rates ESPResSo is using for the MRT algorithm?

 

Greetings

 

Markus