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How can I specify mass flow rate as inlet bc and domain press. info. at same time? |
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#1 |
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Soumitra Vadnerkar
Join Date: Aug 2018
Posts: 70
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There is a fluid flowing inside a tube and the pressure (3MPa) in the tube is given.
I have also given mass flow rate value at inlet. How can I define both of the properties in CFX-Pre? Should I put domain reference pressure as 3MPa (and 0 relative pressure as initial condition)? or should I put initial condition as 3MPa relative pressure and 0MPa as domain reference pressure? |
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#2 |
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Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,933
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You cannot specify pressure and velocity at an inlet.
Some options include: * Specify the pressure at the inlet and the mass flow at the outlet * Specify the mass flow rate at the inlet and the pressure at an outlet. If the simulation is incompressible you can then simply offset the pressure field to a 3MPa inlet pressure. If the simulation is compressible you may need to try a few outlet pressures until the inlet pressure is correct.
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domain boundary condition, initial conditions, pressure, reference pressure |
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