Influence of boundary layer

Freddy · January 18, 2012, 03:37

Hi everybody,

I'm currently investigating the flow close to an aircraft and have a question.
At this project, several different geometrical settings have to be analized. I'm using a k-e realizable turbulence model. After modeling the surface mesh, preliminary CFD simulations have been performed without a boundary layer grid.

Is there a huge differece in the angle of attack (boundary layer separation) with and without using a boundary layer grid? At all investigation, the y+ is located between 30 and 100.

Mfg

Freddy

delaneyluke · January 20, 2012, 01:33

For wall bounded flows, like the one you are analysing, it is recommended to use the k-w SST model which requires a y+ <= 10

Regards
Luke

January 18, 2012, 03:37	Influence of boundary layer	#1
Freddy New Member Freddy S Join Date: Jul 2011 Posts: 2 Rep Power: 0	Hi everybody, I'm currently investigating the flow close to an aircraft and have a question. At this project, several different geometrical settings have to be analized. I'm using a k-e realizable turbulence model. After modeling the surface mesh, preliminary CFD simulations have been performed without a boundary layer grid. Is there a huge differece in the angle of attack (boundary layer separation) with and without using a boundary layer grid? At all investigation, the y+ is located between 30 and 100. Mfg Freddy

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January 20, 2012, 01:33		#2
delaneyluke Senior Member Join Date: Mar 2009 Location: Indiana, US Posts: 186 Rep Power: 17	For wall bounded flows, like the one you are analysing, it is recommended to use the k-w SST model which requires a y+ <= 10 Regards Luke