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problems with calculating pressure coefficient |
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October 7, 2014, 03:33 |
problems with calculating pressure coefficient
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#1 |
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Elvira
Join Date: Oct 2014
Posts: 2
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Hey
I'm simulating a flow around a NACA-profile. For this I want to calculate the pressure coefficient cp. I already added the following lines in my controldict: pressureToolsl { type pressureTools ; functionObjectLibs ("libutilityFunctionObjects.so"); calcTotal no; calcCoeff yes; } Did I forget anything? when I try to calculate this there are problems with the freestreampressure pinf. My boundary say that I've got a velocity at the inlet and a pressure at the outlet given. so how can I change my files to get the pressure coeffient? hope you understand my question thanks at all regards Ernie10 |
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October 7, 2014, 08:59 |
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#2 |
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James Rodgers
Join Date: Jul 2013
Posts: 6
Rep Power: 13 |
Hi Ernie,
I'm by no means an expert but when through a similar exercise a week ago. I found that to calculate the coefficients both static and total you need to specify the reference static pressure and reference velocity within the pressureTools {}. OF didn't pick up the values from the boundary conditions. I think I ended up specifying also the reference density although this is superfluous for the incompressible simulation I was running. Cheers, James |
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October 7, 2014, 09:49 |
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#3 |
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Elvira
Join Date: Oct 2014
Posts: 2
Rep Power: 0 |
ok that sounds plausible.
do you maybe know how I can tell OF to take the information about the pressure and velocity both at the inlet? cheers |
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boundary condition p, freestream pressure, pressure coefficient |
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