Low-Re (full RSTM or analytical RSTM) turbulence model

volker · March 16, 2010, 11:14

hello foamers,

I have basically two questions:
1) I'm looking for an analytical or full reynolds stress model for incompressible flows without wall functions, means in low-Re formulation. Did anybody implement such a turbulence model or is working on? as far as I know there is no RSTM in low-Re formulation in the current release.

2) Does anyone know, if the energy equation can be solved separately from the momentum equation. Supposing you have a fully converged velocity field, would it be possible to solve the energy equation afterwards on top of the velocity field? I think it should be possible by excluding the momentum equation in the solver file. but I just wanted to know if anybody has already experience with that?

many thanks and regards,
\volker

Thomas Baumann · March 17, 2010, 04:55

Hi Volker,

I have implemented an algebraic stress model in low-reynolds formulation. Send me your e-mail adress and you will get it.

If buoyancy-effects or the velocity-temperature-fluctuations can be neglected and the viscosity, etc. can be set as constant, you can solve the NS-equations and afterwards the energy equation.

Regards Thomas

volker · March 17, 2010, 07:44

hello thomas,

great news and many thanks for your reply. I sent you a pm with my mail address.

regards
\volker

xiao · November 16, 2010, 05:54

Dear Thomas,

I am also interested in the Low-Re formulation of RSTM. May I also get a copy of the code?

Best,
Heng

March 16, 2010, 11:14	Low-Re (full RSTM or analytical RSTM) turbulence model	#1
volker New Member Volker Tritschler Join Date: Jan 2010 Posts: 20 Rep Power: 16	hello foamers, I have basically two questions: 1) I'm looking for an analytical or full reynolds stress model for incompressible flows without wall functions, means in low-Re formulation. Did anybody implement such a turbulence model or is working on? as far as I know there is no RSTM in low-Re formulation in the current release. 2) Does anyone know, if the energy equation can be solved separately from the momentum equation. Supposing you have a fully converged velocity field, would it be possible to solve the energy equation afterwards on top of the velocity field? I think it should be possible by excluding the momentum equation in the solver file. but I just wanted to know if anybody has already experience with that? many thanks and regards, \volker

November 16, 2010, 05:54	RSTM in Low Re formulation	#4
xiao Member Heng Xiao Join Date: Mar 2009 Location: Zurich, Switzerland Posts: 58 Rep Power: 17	Dear Thomas, I am also interested in the Low-Re formulation of RSTM. May I also get a copy of the code? Best, Heng

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March 17, 2010, 04:55		#2
Thomas Baumann Senior Member Join Date: Apr 2009 Location: Karlsruhe, Germany Posts: 104 Rep Power: 17	Hi Volker, I have implemented an algebraic stress model in low-reynolds formulation. Send me your e-mail adress and you will get it. If buoyancy-effects or the velocity-temperature-fluctuations can be neglected and the viscosity, etc. can be set as constant, you can solve the NS-equations and afterwards the energy equation. Regards Thomas

March 17, 2010, 07:44		#3
volker New Member Volker Tritschler Join Date: Jan 2010 Posts: 20 Rep Power: 16	hello thomas, great news and many thanks for your reply. I sent you a pm with my mail address. regards \volker