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Question on moving mesh, mesh velocity is really small! |
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December 14, 2012, 12:15 |
Question on moving mesh, mesh velocity is really small!
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#1 |
Member
Jack
Join Date: Dec 2011
Posts: 94
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Hi guys,
I am coding a finite volume code to calculate the unsteady pressure for a moving airfoil. I used Roe scheme, and I am really confused with the moving mesh method. I calculate the mesh moving velocity and it is really small (), and the flow velocity V is larger than 200m/s. And it seems that the mesh moving velocity has no influence on the solution. As I understand, for Roe scheme, the cell surface flux for moving mesh is nearly the same as for stationary mesh, the only different is that the velocity V in eigenvalue for moving mesh is replaced by . () . However, since is very small, it seems that it has limited influence on the solution. Can you guys who had the experience in moving mesh help me? Thanks! |
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April 27, 2014, 13:03 |
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#2 |
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April 28, 2014, 14:37 |
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#3 |
New Member
Join Date: May 2013
Posts: 12
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from a physics stand point, it makes sense that if the boundary moves slowly relative to the flow velocity it will be insignificant ( unless there's some special case). This is true until the geometry changes enough to impact the flow.
It might be considered quasi-static. |
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