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TOPIC: Reynolds Number

Reynolds Number 13 years 11 months ago #852

  • hamidouche
  • hamidouche's Avatar
hi,
I want to know, if wa can integrate the Reynolds number in Telemac 2D. As I see it didn't exist in "Initial condition" ?!

So Reynolds number didn't exist or i can create the parametre , if yes , I want som explainttion ,please :)
Thanks
Souria
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Re:Reynolds Number 13 years 11 months ago #853

  • jmhervouet
  • jmhervouet's Avatar
Hello,

The Reynolds number depends on the diffusion coefficient you are using (and on a typical length depending on every geometry), if it is a matter of issuing it in the results, read the following.

There is a procedure to create new outputs in the results file. First there is a key word for allocating new arrays : NUMBER OF PRIVATE RRAYS (NOMBRE DE TABLEAUX PRIVES). These arrays are in a block called PRIVE (see programming guide to know what is a block), double precision values of array 1 are in PRIVE%ADR(1)%P%R. Then you can write what you want in this array in subroutine PRERES_TELEMAC2d (which then must be in your FORTRAN FILE). Then you have to add N for array 1, O for array 2, R for array 3 and Z for array 4 in key-word : VARIABLES FOR GRAPHIC OUTPUTS.

HOWEVER, in your case, the Reynolds number, once you have chosen a typical length, is proportionnal to the scalar velocity which is already programmed (letter M to add in the VARIABLES fOR GRAPHIC PRINTOUTS), this is probably simpler.

With best regards,

Jean-Michel Hervouet
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