Outlet Boundary Conditions for LES

November 26, 2006, 05:29

I am doing LES of the flow around a bluff body using Fluent 6.2.16. I use velocity inlet BC at the inlet and pressure outlet BC at the outlet.

1. Are these BCs appropriate for LES?

2. I have gone over some of the literatures related to LES and found that Convective Boundary Condition (CBC) is used at the outlet in LES. Do I have to use CBC to get accurate results?

3. How to enable CBC in fluent 6.2.16 if available or incorporate it using User Defined function?

Thanks in adavance

garni

November 29, 2006, 13:52

I don't think you need to define CBC oulet. see Luo et al (2004) LES in airway simulation.

November 26, 2006, 05:29	Outlet Boundary Conditions for LES	#1
garni Guest Posts: n/a	I am doing LES of the flow around a bluff body using Fluent 6.2.16. I use velocity inlet BC at the inlet and pressure outlet BC at the outlet. 1. Are these BCs appropriate for LES? 2. I have gone over some of the literatures related to LES and found that Convective Boundary Condition (CBC) is used at the outlet in LES. Do I have to use CBC to get accurate results? 3. How to enable CBC in fluent 6.2.16 if available or incorporate it using User Defined function? Thanks in adavance garni

November 29, 2006, 13:52	Re: Outlet Boundary Conditions for LES	#2
kk Guest Posts: n/a	I don't think you need to define CBC oulet. see Luo et al (2004) LES in airway simulation.

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