March 12, 2021 at 12:53 pmBibillSubscriberDear all,nI would like to modify the distance function causes the model to behave as RANS in a Detached Eddy Simulation. Is there a possibility to impose our own distance function by means of a UDF ?.Thanks in advance !n
March 12, 2021 at 12:58 pmAitorSubscriberUnfortunately, it is not possible. Why do you want to modify the distance function?n
March 12, 2021 at 1:04 pmBibillSubscriberThank you Aitor for your answer !I'd like to solve with LES only in a part of the fluid domain, defined by an in-house criterion, and with RANS otherwise.n
March 12, 2021 at 1:17 pmAitorSubscriberIn that case, I recommend you to use SBES modeln4.14. Stress-Blended Eddy Simulation (SBES) (ansys.com)nThis is essentially an improvement of the DES model, and you can modify the blending function by means of User-Defined Functions (UDF).nIf the RANS - LES interface is known and the geometry is simple, Embedded Large Eddy Simulations (ELES) are also a good choice.n4.16. Embedded Large Eddy Simulation (ELES) (ansys.com)n
March 12, 2021 at 1:23 pmYasserSelimaSubscribersearch the udf manual for define_trans_flength macron
March 12, 2021 at 4:50 pmBibillSubscriberThank you very much !! These are the pieces of answer I was looking for !n
March 13, 2021 at 11:58 amYasserSelimaSubscriberYou are welcome! Good Luck!n
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