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2D axial symmetry - remeshing due to prescribed displacement fails close to axis?
Posted 2021年1月14日 GMT-5 20:38 Fluid & Heat, Computational Fluid Dynamics (CFD), Mesh Version 5.4 0 Replies
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Hello everyone,
Short version: FSI 2D axially symmetric time-dependent simulation with solid moving along symmetry axis fails presumably because of remeshing failure on the solid-liquid boundary close to the symmetry axis. See image for full explanation.
Long version: I am doing a fluid-solid interaction simulation. It is an axially symmetric 3D simulation, where a solid plate moves parallel to the symmetry axis within a pipe filled with fluid. I am using a prescribed displacement for the moving solid domain and all its edges/vertices, and a deforming Yeon mesh to accomodate for the distortion of the fluid with automatic remeshing. The solid moves fine, but the simulation fails because there is an inversion on the solid-fluid boundary close to the axis symmetry. I tried several conditions, but I am showing you a clear example where no matter how sensitive to distortion the remeshing is, the simulation fails. The less sensitive simulation shows the inversion issue very well.
Any suggestions? Is what I am trying to do not possible on comsol? Thank you very much for your help!
Christos
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Hello Christos Michas
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