Using Pressure Inlet and Velocity Inlet Boundary Conditions Together

abhinavgupta88 · September 25, 2012, 11:44

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

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.

September 25, 2012, 11:44	Using Pressure Inlet and Velocity Inlet Boundary Conditions Together	#1
abhinavgupta88 New Member Abhinav Join Date: Mar 2011 Posts: 13 Rep Power: 4	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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September 25, 2012, 12:03		#3
abhinavgupta88 New Member Abhinav Join Date: Mar 2011 Posts: 13 Rep Power: 4	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.