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Ansys Learning Forum Forums Discuss Simulation Fluids Roughness function Reply To: Roughness function

Rob
Forum Moderator

You mean wall function? Or variable roughness height? The former is covered here https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v241/en/flu_udf/flu_udf_ModelSpecificDEFINE.html%23flu_udf_sec_define_wall_functions  

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