Hi,
I am trying to solve a
Hi,
I am trying to solve a small-scale C-D nozzle via rhocenteralfoam, w.o. applying any back pressure, so I expect full supersonic flow. My solution does not show correct behaviour as I see in divergent section of nozzle, there is a small decrease in velocity followed by increase. In temperature profile I also see a small increase (followed by expected decrease). I think maybe I apply B.C incorrectly. My pressure B.C is: Pressure B.C: boundaryField { inlet { type totalPressure; p0 uniform 1.0487e5; U U; phi phi; rho none; psi none; gamma 1.4; value uniform 1.01e5; } outlet { type waveTransmissive; field p; phi phi; rho rho; psi psi; gamma 1.4; fieldInf 1.01E5; lInf 1.0e0; value uniform 1.01E5; } top { type symmetryPlane; } bottom { type zeroGradient; } wall { type slip; } } I put the value of atmospheric pressure for fieldInf and value, as shown above. The length of nozzle is about 200 micron. Regards, Ehsan |
Hi ehsan,
I use also a Open
Hi ehsan,
I use also a OpenFoam to solve Nozzle problem about an hydraulic turbin (pelton) , for that, I use a RasInterFoam solver. but I didn't found a rhocenteralfoam in OF , is it a solver?! Other thing, why you use a type slip for wall condition?. Hamdi. |
Dear Hamdi,
It is micro-noz
Dear Hamdi,
It is micro-nozzle, so I need to use slip B.C to capture rarefaction effects. The solver is: rhoCentralFoam Do you put an extended region outside your nozzle to apply pressure B.C or you had solved only the main nozzle? Thanks |
Hi Hamdi,
I use OF 1.5, may
Hi Hamdi,
I use OF 1.5, maybe this solver is not in the old version. Is it possible that you email me the boundary (p-u-t) of your geom so that I can be able to see the it in paraview? I see it is 3-d axisymmetric. Email:ehsan.roohi@gmail.com Thanks |
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