Question about staggered grid SIMPLE high Mach number

Harlotte · December 20, 2021, 22:22

Hi everyone,
my name is Gao. I am now using staggered grid SIMPLE to simulate gas exchange. I have successfully simulated gas flow at low speed (Mach<0.3).When I increase the speed, the results are not reasonable.
I have searched some literature and there are some collocated grids with SIMPLE at high speed. But I want to know, it is possible to use staggered grid SIMPLE at high speed.
If you can give me some advice, I will be very grateful for your help.

FMDenaro · December 21, 2021, 10:43

Quote:

Originally Posted by Harlotte

Hi everyone,
my name is Gao. I am now using staggered grid SIMPLE to simulate gas exchange. I have successfully simulated gas flow at low speed (Mach<0.3).When I increase the speed, the results are not reasonable.
I have searched some literature and there are some collocated grids with SIMPLE at high speed. But I want to know, it is possible to use staggered grid SIMPLE at high speed.
If you can give me some advice, I will be very grateful for your help.

High Mach flows should be approached using density-based formulations. Usually, non-staggered grid is used.

December 20, 2021, 22:22	Question about staggered grid SIMPLE high Mach number	#1
Harlotte New Member Gao Shangya Join Date: Oct 2021 Posts: 18 Rep Power: 5	Hi everyone, my name is Gao. I am now using staggered grid SIMPLE to simulate gas exchange. I have successfully simulated gas flow at low speed (Mach<0.3).When I increase the speed, the results are not reasonable. I have searched some literature and there are some collocated grids with SIMPLE at high speed. But I want to know, it is possible to use staggered grid SIMPLE at high speed. If you can give me some advice, I will be very grateful for your help.

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