Hi,

I am simulating a particle flow (Lagrange) in gas and got the following error for particle source change rates "NaN" and "Fatal overflow in linear solver". The first 2000 iteration steps the simulation were computed without particles until I got a stable T-profile. Then I started the solver again with particle tracking (high resolution) and after about 160 iterations this error appeared. Has anybody an idea how to find the problem or what the problem could be?

The solver crashed. Adjust your timestep, check your physics, check you mesh, etc., etc., etc.........

Check particle sources in out-file and try to change particle under relaxation factors.

hdj

Thank you, I will try that. For the last simulation I changed the blend factor to 0.75 instead of "high resolution", it was stable until now (about 800 iterations). I will let you know what happens when I change the relaxation factors.