Energy Prandtl Number

reza_k · March 27, 2015, 06:05

Dear experts, Recently I am working with RSM for modeling turbulent heat transfer. Although, the model correctly captures the hydrodynamics, energy prandtl number should be modified as a function of some geometric parameters (Distance to nearest wall,...) and flow variables (Turbulent Kinetic Energy,...). Unfortunately I could not find any option in, model> viscous> Reynolds Stress, to modify "Energy Prandtl number" with UDF. Energy Prandtl number modification is only available for K-epsilon. I will appreciate someone could help me handle this problem.

LuckyTran · March 29, 2015, 08:29

try /define/model/viscous user-defined
It is the same for all models

reza_k · March 29, 2015, 12:32

thanks, but there is a problem

If you select RSM in Viscous>Model then user-Defined is not visible in TUI.

LuckyTran · March 29, 2015, 12:59

works for me. did you forget to turn on the energy equation?

reza_k · March 29, 2015, 13:17

Dear sir,

I did these:

1- energy equation is On.
2- From GUI, Define>Model>Viscous>Reynolds Stress
3- In TUI, define>Models>viscous> and user-defined is not visible

If I select for example Realizable k-e, then user-defined is visible under turbulence-expert in TUI.

BryceLos · September 11, 2020, 05:56

Quote:

Originally Posted by reza_k

Dear sir,

I did these:

1- energy equation is On.
2- From GUI, Define>Model>Viscous>Reynolds Stress
3- In TUI, define>Models>viscous> and user-defined is not visible

If I select for example Realizable k-e, then user-defined is visible under turbulence-expert in TUI.

Hi,

You solved this? I met the same problem for my udf implementation.

Thanks,
Bryce

March 27, 2015, 06:05	Energy Prandtl Number	#1
reza_k New Member kiarash kiani Join Date: Mar 2015 Posts: 13 Rep Power: 11	Dear experts, Recently I am working with RSM for modeling turbulent heat transfer. Although, the model correctly captures the hydrodynamics, energy prandtl number should be modified as a function of some geometric parameters (Distance to nearest wall,...) and flow variables (Turbulent Kinetic Energy,...). Unfortunately I could not find any option in, model> viscous> Reynolds Stress, to modify "Energy Prandtl number" with UDF. Energy Prandtl number modification is only available for K-epsilon. I will appreciate someone could help me handle this problem.

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March 29, 2015, 08:29		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	try /define/model/viscous user-defined It is the same for all models

March 29, 2015, 12:32		#3
reza_k New Member kiarash kiani Join Date: Mar 2015 Posts: 13 Rep Power: 11	thanks, but there is a problem If you select RSM in Viscous>Model then user-Defined is not visible in TUI.

March 29, 2015, 12:59		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	works for me. did you forget to turn on the energy equation?

March 29, 2015, 13:17		#5
reza_k New Member kiarash kiani Join Date: Mar 2015 Posts: 13 Rep Power: 11	Dear sir, I did these: 1- energy equation is On. 2- From GUI, Define>Model>Viscous>Reynolds Stress 3- In TUI, define>Models>viscous> and user-defined is not visible If I select for example Realizable k-e, then user-defined is visible under turbulence-expert in TUI.