# Dynamic Mesh Capabilities

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 November 26, 2020, 07:32 Dynamic Mesh Capabilities #1 New Member   Avijeet Join Date: Nov 2012 Posts: 18 Rep Power: 13 I've gone through most of the test cases available for dynamic mesh in SU2. I'm not able to understand from those examples whether SU2 has dynamic remeshing capabilities. Ofcourse there are examples of rotating bodies, where some part of the existing mesh is rotating. But is it possible to execute a simulation where, let's say, a wing is moving through air (instead of air moving over the wing), with a steady translation rate, which means the wall will move forward in the mesh, requiring dynamic remeshing to create/fill up holes. Any help will be greatly appreciated.

 November 26, 2020, 12:21 #2 Senior Member   Pedro Gomes Join Date: Dec 2017 Posts: 466 Rep Power: 13 There is no dynamic remeshing in SU2. Also there are no overset meshes. There is steady state translation or rotation of entire domains, and mesh deformation for when some boundaries move but not others. Both are covered in the examples in the TestCases folders.

 November 27, 2020, 02:32 #3 New Member   Avijeet Join Date: Nov 2012 Posts: 18 Rep Power: 13 Thanks pcg for clarifying. Just had one more question, if let's say I gave moving wall condition to my wing surface, with the speed set to whatever mach number want to carry out the study at, and the wall is set to a no-slip wall in a RANS solver, will that work properly?

 November 28, 2020, 11:14 #4 Senior Member   Pedro Gomes Join Date: Dec 2017 Posts: 466 Rep Power: 13 It depends what you consider work properly, would the solver converge? maybe. Would it be physical? Probably not. If you want to simulate steady state flow around a moving thing, you need some kind of infinitely repeating motion. For example the lid-driven cavity problem where one of the surfaces is given a velocity, you can imagine that surface is one side of a belt going past again and again. Another example is a cylinder spining around its axis, no matter at what point in time you look at the cylinder, you see the same thing, i.e. the same surface velocities and the cylinder in the same place.

 December 1, 2020, 07:17 #5 New Member   Avijeet Join Date: Nov 2012 Posts: 18 Rep Power: 13 You're right. I wanted to know if the case thus defined would solve for the correct physics problem. Now I understand that I need to approach it differently. Thanks for taking the time out to answer with examples.

 Tags dynamic mesh;, grid movement;, remeshing

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