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Re: Setting Boundary Values

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January 24, 2017 at 4:51 pm #2525
takamori67
Member

Hi Robin,

for pressure I have initialized the whole fluid with 0 Pa and then let the inlet pressure slowly increase to 100Pa with constant outlet pressure of 0Pa.

Thank you for the example!
So the inlet velocity in physical units is calculated by charU * latticeL ? In your example the physical inlet velocity is 0.002m/s? Accordingly, to have an inlet velocity of 100m/s at a latticeL of 0.0001, I have to set charU to 10^6 m/s?
Then what does latticeU do other than defining the time step with physTime= latticeL*latticeU/charU? Where does the compressibility effects come into play?

Thank you for the help with the scaling factor for CirclePoiseuille3D, that was really useful.

Best,
Sumit