Need help with HELYX-OS Compressible Flow Simulation
Hello there,
I am very new to OpenFOAM which is the reason why I am using a GUI. Currently, I'm trying to simulate a wedge airfoil in a supersonic wind tunnel. I want to ask several things :
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The Base Mesh
snappyHexMesh uses a cut-cell type approach in which
Boundary Conditions Now, on the boundary conditions....you can refer to this presentation. You can also read through the OpenFOAM user's manual for some tips or read a really fantastic source on the subject Hrv Jasak's Thesis, one of the original developers of OpenFOAM. For the most part, you set inlet velocity to type patch with fixedValue and inlet pressure to zeroGradient; outlet pressure to 0 for incompressible flows or something like 1e5 for compressible flows and velocity to zeroGradient; inlet temperature if fixed value and zeroGradient outlet; and then there are many many many variations that are appropriate for stability, accuracy, and portraying real phenomena...accurately. For your case, you will want to look at some of the higher mach boundary conditions like superSonicFreeStream (for velocity inlets) and waveTransmissive (for your pressure outlet). For mapping experimental results directly...then you may need to look a bit more on the forum...I'm drawing a blank. I hope this gets you started. |
Woah, so HELYX-OS is OpenFOAM afterall. Thanks for the info. I'll see if I can make it right. However, I'm still looking for a compressible flow tutorial if there's any.
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