{"id":355285,"date":"2024-03-04T23:31:59","date_gmt":"2024-03-04T23:31:59","guid":{"rendered":"\/forum\/forums\/topic\/how-do-i-define-a-specific-dynamic-mesh-size\/"},"modified":"2024-03-04T23:31:59","modified_gmt":"2024-03-04T23:31:59","slug":"how-do-i-define-a-specific-dynamic-mesh-size","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-do-i-define-a-specific-dynamic-mesh-size\/","title":{"rendered":"How do I define a specific dynamic mesh size?"},"content":{"rendered":"

I have this moving boundary in axysimmetrical FLUENT simulation. However, regardless what I do, the region after the dynamic mesh remeshing becomes a lot bigger than the original mesh. Here are my settings, how do i fix it? Also setting the max length to a much smaller value did not fix the issue rather would remesh everything else into that size, which slows down computation significantly. Are there any other ways to get fine mesh specifically in between that gap between the moving boundary and the wall without using adaptive meshing? Adaptive meshing does not work in my case because I will have to remove the moving boundary later on and adaptive cells wont allow that. <\/p>\n

This is the original mesh and the unmoved boundary
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The below is the mesh after the boundary movement, as you can see, the post dynamic mesh gap between the moving boundary and the wall has a lot less fine mesh than everywhere else.<\/p>\n

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I am using diffusion smoothing, remeshing, max skew 0.6, max length is that finest mesh size, min length is half of that. <\/p>\n

Any help would be appreciated.<\/p>\n

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 <\/p>\n","protected":false},"template":"","class_list":["post-355285","topic","type-topic","status-closed","hentry","topic-tag-fluent-mesh"],"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