STEADY+TRANSIENT DPM stability
 

Dear all,

I have issues with stability of solution for steady state airflow + transient DPM.

The continuity equation seems to fluctuate and has difficulty of decrease compared with transient +transient DPM.

Ie 1.3e-4 is best for continuity and 1e-6 is for transient.

Basically I am simulating a jet breakup using Plain orifice Nozzle TAB.

I tried decrease transient particle time-step but it doesn't seems to work. Also I am confused how the step length factor helps.

I only integrate 1 meaning the trajectory equation is integrate once and source term is updated.

Thanks

Jee