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#1 |
New Member
velkon123
Join Date: Jan 2020
Posts: 14
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Hi!
I am trying to isolate a precessing vortex core with the Q criterion. However because there are a lot of other structures visible when imposing a certain Q value, I can not see the PVC properly. Does anybody know a method where you can isolate the 3D PVC with the Q-criterion. Kind regards, Last edited by velkon; July 25, 2022 at 09:57. |
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#2 |
Senior Member
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The stupid question first: does your velocity field suggest that a PVC is actually present?
Second, have you tried with different Q values? I only worked on a single geometry with multiple swirl ratios, but I was able to visualize it both with the Q and lambda criterions. |
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#3 | |
New Member
velkon123
Join Date: Jan 2020
Posts: 14
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Quote:
Thank you for your response. Yes from POD and experimental results it is clear that a PVC is present in the flow. Furthermore I can see the PVC with the Q criterion when imposing different values. However a lot of other structures are still also present making it hard to see it. Do you perhaps know how to isolate the PVC from those other structures? |
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#4 | |
Senior Member
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Quote:
What solver/visualizer are you using? How is your Q defined? Is it possible that it is coded wrong? |
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Tags |
pvc, q-criterion, stability, swirl |
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