Turbulence model for wing with deflected flap

sunti · December 20, 2011, 02:03

Dear all,

I need to run a simulation on a wing with a flap deflection of 30 degrees. The airplane is flying at 40 m/s at sea level. Would the k-omega SST be a good turbulence model to use for this case? Or would you suggest something else?

Further, how do I estimate turbulence intensity and freestream viscosity ratio???

Any suggestions are welcome!
Cheers!

truffaldino · December 20, 2011, 04:37

I suppose you are talking about full-scale airplane, so that Re is of order 10^6-10^7. In this case the flow will be tubulent almost everywhere and you can use simpler turbulence models such as S-A model. Multi-equation transitional turbulence models shold be more accurate in theory, but in practice they are usually not without a sophisticated user input.

December 20, 2011, 02:03	Turbulence model for wing with deflected flap	#1
sunti New Member sunti Join Date: Nov 2011 Posts: 6 Rep Power: 14	Dear all, I need to run a simulation on a wing with a flap deflection of 30 degrees. The airplane is flying at 40 m/s at sea level. Would the k-omega SST be a good turbulence model to use for this case? Or would you suggest something else? Further, how do I estimate turbulence intensity and freestream viscosity ratio??? Any suggestions are welcome! Cheers!

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December 20, 2011, 04:37		#2
truffaldino Senior Member Join Date: Jan 2011 Posts: 249 Blog Entries: 5 Rep Power: 17	I suppose you are talking about full-scale airplane, so that Re is of order 10^6-10^7. In this case the flow will be tubulent almost everywhere and you can use simpler turbulence models such as S-A model. Multi-equation transitional turbulence models shold be more accurate in theory, but in practice they are usually not without a sophisticated user input.