{"id":358874,"date":"2024-03-25T19:03:02","date_gmt":"2024-03-25T19:03:02","guid":{"rendered":"\/forum\/forums\/topic\/advice-about-local-and-global-refinements-in-ansys-meshing-for-cfd\/"},"modified":"2024-03-25T19:03:02","modified_gmt":"2024-03-25T19:03:02","slug":"advice-about-local-and-global-refinements-in-ansys-meshing-for-cfd","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/advice-about-local-and-global-refinements-in-ansys-meshing-for-cfd\/","title":{"rendered":"Advice about local and global refinements in Ansys meshing for CFD"},"content":{"rendered":"

Hi ,<\/p>\n

I have a model of a shell and tube heat exchanger where the shell side flow is what is resolved. I have a few doubts I would like some advice as I am still at very basic level of CFD : <\/p>\n

    \n
  1. For example : I have set my global maximum element size as 2 mm , then I apply face sizing to the shell wall (2 mm) and also to the tube wall ( 1.8 mm ) : how should I decide on the element sizes for the face sizing when refining. <\/li>\n
  2. I would like to conduct a grid independent study, but I am still unable to obtain proper texts which provide advice on how a mesh independent study should be conducted. <\/li>\n
  3. Also a few doubts , initally i had around 900,000 elements and my solution picked up transience , I applied sizing as above and refined after which the transient got removed ( 4.0 million elements ) is this usual. <\/li>\n
  4. Should I apply inflation ?<\/li>\n<\/ol>\n

    Sorry for so much questions, I am trying to figure out CFD still .<\/p>\n

    TIA,<\/p>\n

    Ashen <\/p>\n

    \"\"<\/p>\n","protected":false},"template":"","class_list":["post-358874","topic","type-topic","status-closed","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-heat_exchanger-1","topic-tag-heatfluxfluentnaturalconvectionexternalflowansys-1","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