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November 5, 2023, 07:06 |
Diverging Results with density based solver
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#1 |
New Member
Ashwin
Join Date: Jul 2023
Posts: 10
Rep Power: 3 |
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 decent steady state solution altho the residuals weren't perfect(oscillating somewhere between 1e-3 and 1e-4). When I started to run the transient solution , my results start diverging near the wall, which I think is caused by high accept ratio cells near the wall/inflation layers. 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 downstream exceeds 3. Please let me know how to fix this issue. I will attach pictures I have also tried turning warped face gradient correction off but it still diverges in the transient simualtion. Courant no - 5 1.So how do I reduce residuals in steady state, right now its oscialllting somewhere between 1e-3 and 1e-4 2. How do I prevent this from diverging as shown above in transient sim? Thanks |
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November 5, 2023, 22:03 |
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#2 |
New Member
Ashwin
Join Date: Jul 2023
Posts: 10
Rep Power: 3 |
Hello guys, any help would be greatly appreciated, Thanks
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