Which Turbulence Model?

wilsonudevil · August 20, 2009, 07:13

Hi all,

Not sure which turbulence model I should be using!

I'm modelling the flow of air (around 40 to 100 l/s) through a small ventilation unit using CFX

Air velocities are low, less than 1 m/s.

It's about 300 x 300 x 600 mm and contains a copper tube heat exchanger and a filter which I've modelled at pressure drops.

Many thanks for any help!

Killercam · October 8, 2009, 11:46

Try using the Menter Shear Stress Transport Model.

This uses K-epsilon in the free stream and k-omega near wall - best of both worlds...

Cheers,

Killercam

wilsonudevil · October 8, 2009, 11:57

I ended up running most of my simulations using either SSG or RNGkEpsilon. Seemed to provide the closest match to my experimental results.

I'll have a look into the turbulence model that you suggest though.

Cheers pal!

August 20, 2009, 07:13	Which Turbulence Model?	#1
wilsonudevil New Member William Wilson Join Date: Jun 2009 Posts: 4 Rep Power: 16	Hi all, Not sure which turbulence model I should be using! I'm modelling the flow of air (around 40 to 100 l/s) through a small ventilation unit using CFX Air velocities are low, less than 1 m/s. It's about 300 x 300 x 600 mm and contains a copper tube heat exchanger and a filter which I've modelled at pressure drops. Many thanks for any help!

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October 8, 2009, 11:46		#2
Killercam New Member Nicholas F Camus Join Date: Sep 2009 Location: London, England. Posts: 21 Rep Power: 16	Try using the Menter Shear Stress Transport Model. This uses K-epsilon in the free stream and k-omega near wall - best of both worlds... Cheers, Killercam

October 8, 2009, 11:57		#3
wilsonudevil New Member William Wilson Join Date: Jun 2009 Posts: 4 Rep Power: 16	I ended up running most of my simulations using either SSG or RNGkEpsilon. Seemed to provide the closest match to my experimental results. I'll have a look into the turbulence model that you suggest though. Cheers pal!