{"id":160501,"date":"2021-07-20T00:14:01","date_gmt":"2021-07-20T00:14:01","guid":{"rendered":"\/forum\/forums\/topic\/what-is-the-accurate-way-to-create-mesh-around-fsi-boundary-in-harmonic-acoustics\/"},"modified":"2021-07-27T20:51:00","modified_gmt":"2021-07-27T20:51:00","slug":"what-is-the-accurate-way-to-create-mesh-around-fsi-boundary-in-harmonic-acoustics","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-is-the-accurate-way-to-create-mesh-around-fsi-boundary-in-harmonic-acoustics\/","title":{"rendered":"What is the accurate way to create mesh around FSI boundary in Harmonic Acoustics?"},"content":{"rendered":"
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Hello,<\/p>\n

I'm working on a simulation of a polymer disc in a water enclosure, where a pressure source is applied to the top and side surfaces of the polymer disc, and its top surface is set to be fixed. I wonder if the default mesh created by harmonic acoustics would be accurate enough. I'm specifically concerned about the meshing around the interface between polymer and water. What the default mesh shows (the cross section of the mesh is shown in the screenshot below), includes a significant mismatch between the mesh cells in the polymer and the ones in water. I wonder if this can lead to inaccurate results, or the FSI boundary defined between the polymer top and side surfaces and the water enclosure would somehow insure the accuracy. If necessary, how can I avoid such mismatch between the mesh cells? <\/p>\n

Also, I am trying to plot the deformation of the center point on the top surface of the polymer disc versus frequency as the simulation result. For this purpose, I have only been able to define a named selection by selecting a mesh node and then define the deformation plot to be evaluated on this mesh node point. However, this does not guarantee that the mesh node is in the center of the disc. Is there any way to do selection of a point other that mesh nodes, using its coordinates?<\/p>\n

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\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-160501","topic","type-topic","status-closed","hentry","topic-tag-fsi","topic-tag-harmonic-acoustics","topic-tag-meshing"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t