Learning Forum

[Ashwin Subramanian Murugan]

Hello all, The inlet of my geometry has a supersonic nozzle. I am trying to simulate flow through it in steady state initially and then later in 

unsteady conditions.

With the density based solver I was able to get a steady state solution. When I started to run the transient solution , my results start diverging near the wall. Without the inflation layers, it is not diverging.

 

However, when I use the pressure based solver  I am able to get really good results with inflation layers as well. I want to recreate the results using density based solver as Mach number in my flow exceeds 3.

Please let me know how to fix this issue.

I will attach pictures

Solver settings for steady state simulation

Courant no - 5
when I start the transient sim, after some iterations: (timestep 1e-6 s)

1. How do I prevent this from diverging as shown above in transient sim?
Thanks

[Rob]

Duplicate https://forum.ansys.com/forums/topic/diverging-results-with-density-based-solver-2/

[Ashwin Subramanian Murugan]

Hello, can anyone please help me with this problem?