{"id":361585,"date":"2024-04-10T16:51:49","date_gmt":"2024-04-10T16:51:49","guid":{"rendered":"\/forum\/forums\/topic\/doubt-about-y-plus-value-for-simulations\/"},"modified":"2024-04-10T16:56:01","modified_gmt":"2024-04-10T16:56:01","slug":"doubt-about-y-plus-value-for-simulations","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/doubt-about-y-plus-value-for-simulations\/","title":{"rendered":"Doubt About Y Plus Value for Simulations"},"content":{"rendered":"

Hi, <\/p>\n

I am doing a CFD of a shell and tube heat exchnager ( simple model with 7 tubes(. I am using a standard wall function with a K Epsilon standard turbulence model<\/strong><\/span>. The target y plus is 30 so I use a Yh of 2.2 mm with 2 layers. <\/p>\n

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  1. The average y plus is around 14 at the tube surface after CFD post, I can increase it but the inflation mesh coarsens. I did increase but there isnt a signifcant increase ( increases to 19 around). Solutions are converging to reasonable results ( plot is shown below). <\/li>\n
  2. I am able to easily refine the wall mesh to get Y plus values around 5 , then is it reasonable to use the standard wall function in this case. As in literature i see such cases. Or should I opt for a enhanced wall treatment or scalable.<\/li>\n<\/ol>\n

    TIA, <\/p>\n

    Ashen <\/p>\n

    \"\"<\/p>\n","protected":false},"template":"","class_list":["post-361585","topic","type-topic","status-closed","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-heat_exchanger-1"],"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