Simulation of helicopter blades using periodic bc

johnsherjy · September 29, 2018, 07:32

Hi

I am simulating the flow over the 4 bladed helicopter rotor in hover configuration using LES. Since the flow is periodic, i wish to simulate the flow in an quadrant using periodic boundary condition..Kindly help me to solve the pbm
i used wall slip BC at all outer boundaries. The two inner faces are subjected to periodic BC. I am not being to get the solution as it is diverging.
1)Can u use this condition when i am using implicit solver. The inner region is rotated with a specific rpm using rigid body motion.
I hereby attach the screenshot of the geometry.
Thank you in advance

D. Lehnardt · July 23, 2020, 07:39

Hey,

Did you manage to get it to work?

I am currently modeling an identical problem, but I am imposing the rigid body motion on the entire domain.

I am using DES with k-omega in the near wall region, but my residuals are just hovering above 1E-2...
My time-step is equivalent to one degree of rotation.

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July 23, 2020, 07:39		#2
D. Lehnardt New Member David Lehnardt Join Date: Apr 2018 Posts: 4 Rep Power: 8	Hey, Did you manage to get it to work? I am currently modeling an identical problem, but I am imposing the rigid body motion on the entire domain. I am using DES with k-omega in the near wall region, but my residuals are just hovering above 1E-2... My time-step is equivalent to one degree of rotation.