Low Re k-e model and heat transfer

July 5, 2000, 02:46

hello,

can anybody out there tell me how to implement the boundary condition for temperature in low re k-e model. Since the first grid point is in viscous sub-layer ie y+<0.1, turbulence is absent in this y+ range. so i can't use law of the wall for temperature. can i use Qw= - K_eff dt/dy where K_eff is conductivity of fluid since turbulence is absent K_turb=0.0. other wise K_eff=K_turb+K_fluid. is this correct? thanks abhijit

July 5, 2000, 06:32

Yes, I think so. Because your mesh is fine enough, you can treat it in this way.

July 5, 2000, 02:46	Low Re k-e model and heat transfer	#1
Abhijit Tilak Guest Posts: n/a	hello, can anybody out there tell me how to implement the boundary condition for temperature in low re k-e model. Since the first grid point is in viscous sub-layer ie y+<0.1, turbulence is absent in this y+ range. so i can't use law of the wall for temperature. can i use Qw= - K_eff dt/dy where K_eff is conductivity of fluid since turbulence is absent K_turb=0.0. other wise K_eff=K_turb+K_fluid. is this correct? thanks abhijit

July 5, 2000, 06:32	Re: Low Re k-e model and heat transfer	#2
Jason Guest Posts: n/a	Yes, I think so. Because your mesh is fine enough, you can treat it in this way.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Water subcooled boiling	Attesz	CFX	7	January 5, 2013 04:32
Convective / Conductive Heat Transfer in Hypersonic flows	enigma	Main CFD Forum	2	November 1, 2009 23:53
Water vapour condensation in CFX-5.7.1	hdj	CFX	1	November 27, 2005 08:15
Convective Heat Transfer - Heat Exchanger	Mark	CFX	6	November 15, 2004 16:55
Multicomponent fluid	Andrea	CFX	2	October 11, 2004 06:12