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-   -   Using Pressure Inlet and Velocity Inlet Boundary Conditions Together (http://www.cfd-online.com/Forums/fluent/107368-using-pressure-inlet-velocity-inlet-boundary-conditions-together.html)

abhinavgupta88 September 25, 2012 11:44

Using Pressure Inlet and Velocity Inlet Boundary Conditions Together
 
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.

shk12345 September 25, 2012 11:54

Quote:

Originally Posted by abhinavgupta88 (Post 383568)
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

abhinavgupta88 September 25, 2012 12:03

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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