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If you need more help we need your model (all files).
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https://drive.google.com/drive/folde...00?usp=sharing
https://drive.google.com/drive/folde...00?usp=sharing thank you for that Mr. Uwe Pilz Please take a look at the link of google drive where you can get the files I used. The parameters I know are inlet velocity - 1.46 m/s inlet static pressure - 6 Bar fluid - water and I used the dynamic viscosity of water at room temperature. According to the experiment the outlet velocity should be 20 m/s. I am solving for steady state using kOmega, but kEpsilon is also ok for me. with that settings I am getting 35 m/s and negative pressure. Don't know why. Please tell me what is the problem. Cheers Bharadwaj |
As far as I can see it at a quick view your boundary conditions are contradicting:
You give both pressures AND an inlet velocity. That cannot work. If you give both pressures, the simulation calculates the resulting velocity. If you give a velocity and a reference point for pressure the simulation calculates the pressure difference between inlet and outlet. You cannot have both. |
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Oh OK OK. thank you for the quick reply. But I tried by giving just velocity, still not getting the velocity of around 20 m/s. Can you set the BC's of all and run the file once, so that it will give correct results. Because I am stuck there. :confused: |
If nobody else answers you have to wait for some days. I am jsut go for a short holiday.
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I looked at your b.c. You used the combination of
Code:
totalPressure Code:
pressureInletOutletVelocity If you use Code:
zeroGradient and Code:
fixedValue for the pressure inlet your simulation runs. You get some value of U which corrsponds to the pressure difference. As I mentioned before you my set a value of U at the inlet instead and give a reference print for the pressure, you get the pressure difference which corrsponds to the velocity selected. |
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