Learning Forum

[Jianghu]

I am running a coal combustion case. The residual has spikes every time the discrete phase is simulated.

I kept the momentum for 1^st order for momentum for 6700 iterations. But the continuity residual didn’t drop much. Once I changed momentum to 2^nd order, the continuity residual jumped.

Is there any suggestion to reduce the continuity residual.

[Jianghu]

[Prashanth]

You must play with the under relaxation factors (DPM URF etc.) with first order scheme first, make it stable and then move to second order schemes.