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Low Reynolds no (near rarefied) flow simulation in CFD++ or conventional CFD packages

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Old   February 4, 2018, 11:39
Default Low Reynolds no (near rarefied) flow simulation in CFD++ or conventional CFD packages
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Bal Krishan
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I am trying to simulate the low Reyonlds no. flow in CD nozzle using CFD++ but my solution is not converging at all

But when i am giving larger values of pressure (stagnation boundary condition) keeping same pressure ratio some time it is converging

can anybody help regarding the problem
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