Low Re turbulent model

Minerva · February 17, 2010, 12:03

Hi all,

I'm working on a low Re (~220000), low AR (~1.5-2) MAV model, and I'm now confused with which turbulent model to use.

I realise that if I want to use k-epsilon and k-omega, I will need Y+ to be about 30, while if I use k-omega with the transitional flows option enabled, I will need Y+=1. So I want to decide which is a better model for my case before generating the grid.

Could anyone give me a hint and recommend a good book on this? There are also some variants of both models, please could someone explain their differences (or are they just much the same)?

xxxx

Philipov · February 18, 2010, 02:17

Refer to the UG... in Fluent use TUI (text user interface) from there you can find more turbulent models....

Minerva · February 18, 2010, 07:50

Quote:

Originally Posted by Philipov

Refer to the UG... in Fluent use TUI (text user interface) from there you can find more turbulent models....

I acutally read the UG before I post the question: Nothing much says about which model is better for low Re. The only reference to Re is that k-omega can be used for both high and low Re situations.

February 17, 2010, 12:03	Low Re turbulent model	#1
Minerva New Member Cora F Join Date: Feb 2010 Location: Sheffield, UK Posts: 2 Rep Power: 0	Hi all, I'm working on a low Re (~220000), low AR (~1.5-2) MAV model, and I'm now confused with which turbulent model to use. I realise that if I want to use k-epsilon and k-omega, I will need Y+ to be about 30, while if I use k-omega with the transitional flows option enabled, I will need Y+=1. So I want to decide which is a better model for my case before generating the grid. Could anyone give me a hint and recommend a good book on this? There are also some variants of both models, please could someone explain their differences (or are they just much the same)? xxxx

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February 18, 2010, 02:17		#2
Philipov Senior Member Svetlin Filipov Join Date: Mar 2009 Location: United Kingdom Posts: 176 Rep Power: 17	Refer to the UG... in Fluent use TUI (text user interface) from there you can find more turbulent models....