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Pressure driven flow issues at the inlet of a pipe |
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January 30, 2015, 12:26 |
Pressure driven flow issues at the inlet of a pipe
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#1 |
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Richardpluff
Join Date: May 2014
Posts: 95
Rep Power: 12 |
Hi everyone,
I noticed an strange behaviour at the inlet of my domain when a combination of totalPressure(p)+pressureInletOutletVelocity(U)-----inlet and fixedValue(p)+inletOultet(U)------- outlet. I want to impose pressure in both inlet and outlet patches. Simulation converges using both simpleFoam and rhoSimpleFoam, but when I look at the results I see a strange behaviour of pressure, velocity and wall shear stress fields. Please have a look at the attachments (this is not the best snapped mesh, but this behaviour is always observed, no matter the mesh quality, size or smoothness, so I guess mesh is not the problem here) Anybody could give me any hint? Mesh is obtained using blockMesh+snappyHexMesh and surfaceCheck utility shows a good mesh stl quality. I think this should be related with boundary conditions for a pressure driven flow, but I cannot figure out what is happening. I suppose pressure should be uniform at the inlet and velocity profile should vary in the inlet plane. This fact for example leads to a wrong magnitude and location of maximun wall shear stress, which is very important in my results. Thanks in advance, CRI |
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May 25, 2016, 13:11 |
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#2 |
New Member
Caio Martins Ramos de Oliveira
Join Date: Apr 2016
Posts: 8
Rep Power: 10 |
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