Why is the pressure larger than the total pressure
I am simulating a gas flow through a rotating multi-channels with CFX, both the inlet and outlet are the Opening boundary condition. While the inlet has a reletive pressure of 4atm, and the outlet of 2atm, rotation speed is 10000r/min. When I look the result of my computation, at the inlet plane, the pressure is larger than the total pressure, how could this happened?
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Can you show some images of what you are seeing?
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http://b310.photo.store.qq.com/psb?/...ORAQAAAAADADI!
[IMG] These are the inlets, the range of the contour is local, from the picture we can see that the pressure is larger than the total pressure in the inlets plane, I don't know why. |
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[IMG]http://b323.photo.store.qq.com/psb?/V13rxVKa3rhjqK/dwmy9NgB8guQ2FZrPtVmGUFOOzoOhbMyE*ps3QsggBA!/b/dGl*isCnAAAA&bo=hAOAAQAAAAADACM![/IMG]
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2 Attachment(s)
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We will need to see a bit more of the geometry to make any sense of it. Can you post an image which shows what the flow is actually doing?
Also, is this boundary on a rotating frame of reference? Multiphase? Does it have reverse flow? |
1 Attachment(s)
This boundary is on a rotating frame of reference, no multiphase. The geometry is a turbine blade internal cooling channel, in the computation, the trailing edges did have reverse flow.
Attachment 16788 |
Where is the axis of rotation for the domain?
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The axis of the rotation is on the negative y direction
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I see. I cannot explain what you are seeing.
What does the total pressure in the stationary frame of reference look like? |
The problem has been solved. Thank you! When I put the total pressure in the stationary frame of reference, the result is correct.
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