Fluids

Fluids

Turbulent Fluctuating Correction in near wall region

    • Shuvo Chowdhury
      Subscriber

      Hello Everyone. I have been stuck at a problem for 4 months.I will be grateful to you someone can help or provide ahy hints.

      The problem is: I need to modify normal component of turbulent fluctuating velocity as per the equation below in RSM turbulent model. 

      Corresponding research paper says, they have done this near wall modification after the flow convergence through UDF code. I tried different UDF macro ( like DEFINE_ADJUST, DEFINE_FIXED), but that did not work.

      Can anyone suggest what else possible ways can be or any way to modify the flow variables .

      Thanks for your valuable time and attention.

    • Rob
      Ansys Employee

      You can re-write the wall functions https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v222/en/flu_udf/flu_udf_ModelSpecificDEFINE.html%23flu_udf_sec_define_wall_functions ; source terms may also work. All I can advise (Ansys staff are limited in what we can say on here) is read the UDF manual having worked out what you need to alter. 

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