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rhoCentralFoam with totalPressure/totalTemperature at inlet of subsonic channel |
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October 26, 2010, 15:10 |
rhoCentralFoam with totalPressure/totalTemperature at inlet of subsonic channel
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#1 |
Member
Oliver Borm
Join Date: Mar 2009
Posts: 60
Rep Power: 17 |
I tried to run a very simple subsonic channel with rhoCentralFoam, with the following boundary conditions at the inlet:
p: totalPressure T: totalTemperature U: pressureDirectedInletVelocity This gives me after a few iterations a very low pressure in the first cell layers, which is completely wrong, as I initialised the complete fields with the correct constant static solution. See the attached picture and case. If I run the same case with sonicFoam I get my expected results. Why is rhoCentralFoam not able to handle these combination of boundary conditions correctly? |
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February 1, 2013, 08:28 |
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#2 |
Member
Valentin Wibaut
Join Date: Oct 2012
Posts: 45
Rep Power: 13 |
Hi,
I re-activate this post cause I have the same problem. I want to simulate the flow in a nozzle and rhoCentralFoam gives a very wrong solution (and some times errors). Like deepblue17, I try to initialize with the correct solution but it also gives wrong solution. Any idea about how to solve this problem? Thanks a lot |
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February 4, 2013, 17:17 |
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#3 |
Senior Member
Ehsan
Join Date: Oct 2012
Location: Iran
Posts: 2,208
Rep Power: 26 |
i have many problems with this solver.then ill go to sonicFoam if its more stable.
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February 7, 2013, 23:44 |
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#4 |
Member
Anant Diwakar
Join Date: Jan 2013
Posts: 68
Rep Power: 13 |
Hi
I am solving axisymmetric flow problem of flow between two rotating cylinders using rhoCentralFoam. I generated the mesh in GMSH and converted it into openFoam using gmshToFoam utility. But when I am running the simulation, I am getting non-zero radial velocity near the outer rotating cylinder, which ideally should be zero. The Uy and the velocity vector plots near the outer rotating wall are attached. The axis of rotation is along X axis. Hence Uy is the radial velocity component. Can some one tell why is this happening ? Thanks Anant |
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February 9, 2013, 11:44 |
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#5 |
Senior Member
Ehsan
Join Date: Oct 2012
Location: Iran
Posts: 2,208
Rep Power: 26 |
hi Valentin.did you find the solution of this problem or the cause of it?I have also this problem and continuity exploding with rhoPimpleFoam too(in simple scavenging or filling a closed end channel)
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February 11, 2013, 02:42 |
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#6 |
Member
Valentin Wibaut
Join Date: Oct 2012
Posts: 45
Rep Power: 13 |
No I doesn't find any solutions or cause to this problem. I will tell you if I have more informations about it.
Thanks to mention that there is also the problem with rhoPimpleFoam. |
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