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Using Pressure Inlet and Velocity Inlet Boundary Conditions Together

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Old   September 25, 2012, 11:44
Default Using Pressure Inlet and Velocity Inlet Boundary Conditions Together
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Abhinav
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I am simulating Flow over an Airfoil. The Flow is compressible. For the Inlet I am using Pressure Inlet. Apart from that I have a jet on the top the Blade. For Jet Inlet I am using Velocity Inlet Boundary Condition. I ran the case it ran for 50 time steps and diverged. I wanna know if there is any way to use both of the boundary conditions together.
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Old   September 25, 2012, 11:54
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shoeb khan
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Quote:
Originally Posted by abhinavgupta88 View Post
I am simulating Flow over an Airfoil. The Flow is compressible. For the Inlet I am using Pressure Inlet. Apart from that I have a jet on the top the Blade. For Jet Inlet I am using Velocity Inlet Boundary Condition. I ran the case it ran for 50 time steps and diverged. I wanna know if there is any way to use both of the boundary conditions together.
I dont think so. Just give it a try again by reducing the under relaxation factors.
You can try mass flow and velocity inlet BC
that should work.

shk
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Old   September 25, 2012, 12:03
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I already tried reducing under relaxation factors. It did not work. I am gonna try making jet Inlet and Outlet at wall first and run some time steps and after reasonable convergence I am gonna change the Boundary Conditions for Jet.
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