Hi guys,
Recently I am trying to compare simvascular CFD results with other software CFD results as validation analysis for my project. I used resistance boundary condition for all the outlets, but the pressure distribution is not correct for other CFD software. In my wrong simulation results, the outlet BC will have a high pressure because p = p0 +rq as defined by the definition of resistance boundary condition, then the inlet has a lower pressure.
I was wondering is there any pressure correction or adjustment for the inlet BC in simvascular that I missed to consider? Currently the inlet BC has the constant flow rate. Any idea is appreciated.
Inquiry about the pressure in the inlet
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Weiguang Yang
- Posts: 110
- Joined: Mon Apr 07, 2008 2:17 pm
Re: Inquiry about the pressure in the inlet
Did you also use the resistance BC for other CFD software packages? You can start with a zero pressure BC for all software packages you want to compare as the baseline. Then consider comparing resistance or RCR. For commercial CFD software packages, did you use a UDF function to implement the resistance BC?
If you compare a simulation with a resistance BC to a simulation with zero pressure BC, the pressure will differ.
If you compare a simulation with a resistance BC to a simulation with zero pressure BC, the pressure will differ.
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Sinko Fang
- Posts: 9
- Joined: Fri Sep 09, 2022 12:16 pm
Re: Inquiry about the pressure in the inlet
Thank you for your reply. I see your point and I'll keep investigating on it.wgyang wrote: ↑Mon Apr 03, 2023 8:44 pmDid you also use the resistance BC for other CFD software packages? You can start with a zero pressure BC for all software packages you want to compare as the baseline. Then consider comparing resistance or RCR. For commercial CFD software packages, did you use a UDF function to implement the resistance BC?
If you compare a simulation with a resistance BC to a simulation with zero pressure BC, the pressure will differ.