Laminar or tubulent Boundary layer?

January 17, 2003, 08:44

Can Fluent predict the laminar-turbulent transition over a surface? I am using the spallart Allmaras turbulence model for an airfoil and the drag is too high. I suppose its because of the turbulent boundary layer. I want a laminar BL but I`m not sure how to get it. The turbulence intensity is set for 1% and the hydraulic diameter is around 10mm.

January 23, 2003, 21:41

As far as I know, Spallart Allmaras turbulence model can not predict laminar-turbulent transition. They say that K-omega with transitional flow option can do(I did not have experience wirh that model).

Sincerely, Jinwook

January 17, 2003, 08:44	Laminar or tubulent Boundary layer?	#1
Rodrigo Madariaga Guest Posts: n/a	Can Fluent predict the laminar-turbulent transition over a surface? I am using the spallart Allmaras turbulence model for an airfoil and the drag is too high. I suppose its because of the turbulent boundary layer. I want a laminar BL but I`m not sure how to get it. The turbulence intensity is set for 1% and the hydraulic diameter is around 10mm.

January 23, 2003, 21:41	Re: Laminar or tubulent Boundary layer?	#2
Jin-Wook LEE Guest Posts: n/a	As far as I know, Spallart Allmaras turbulence model can not predict laminar-turbulent transition. They say that K-omega with transitional flow option can do(I did not have experience wirh that model). Sincerely, Jinwook

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