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NACA 0012 analisys

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Old   September 23, 2005, 10:39
Default Hi i'm trying to analize a nac
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Muzio Grilli
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Hi i'm trying to analize a naca 0012 airfoil at mach
0.2 and 2000 meters altitude. I'm using TurbFoam solver and my process crashes everytime.I've set this boundary conditions

velocity inlet
pressure outlet
airfoil (wall functions)
top and bottom (slip)

I've set a velocity value at the inlet and then the initial velocity field is set to zero.
The pressure value is the same for the outlet and the initial field
I've set a value for K and epsilon for the initial field and the velocity inlet
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Old   September 23, 2005, 12:31
Default This you could investigate:
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Mattijs Janssens
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This you could investigate:

Do you get a memory fault (sigsegv etc.) or floating point error (sigfpu). Is it diverging? Are you running with FOAM_ABORT / FOAM_SIGFPE (see board)?
Is eps non-zero? Is there inflow at the outlet?
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Old   September 26, 2005, 05:42
Default Setting the initial velocity f
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Joao Henriques
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Setting the initial velocity field to zero is not a good ideia because you introduce a discontinuity at the inlet that is physically irrealistic and the equations become more stiff when aproaching the zero velocity.
I sugest you initialize all the initial field equal to the inlet boundary conditions.
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Old   September 26, 2005, 05:47
Default I solved this problem using so
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Muzio Grilli
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I solved this problem using sonicTurbFoam solver,but now i have another problem:

I have a good velocity field but the pressure field is a bit strange. Someone can tell me if when i visualize p with paraview i'm visualizing dinamic pressure or static pressure?
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