Epsilon boundary condition for walls in LamBremhorst LowRe model

maruthamuthu_venkatraman · March 16, 2010, 04:27

Dear Foamers,

Could anyone tell me the boundary condition for epsilon when we use LamBremhorst Turb model. The literature says there are two types of LB model . The change is only with BC for epsilon at walls.
1. Setting zero gradient for epsilon
2. Setting (nu. d2k/dy2 ) = 0

I presume k can be set as very low value at the wall and nut (turb viscosity) as zero gradient.

If anyone can shed some light it would be useful.

Thanks

calf.Z · April 21, 2019, 07:25

I am wondering how I can set nu.d2k / dy2= 0 in epsilon boundary condition.

March 16, 2010, 04:27	Epsilon boundary condition for walls in LamBremhorst LowRe model	#1
maruthamuthu_venkatraman Member Maruthamuthu Venkatraman Join Date: Mar 2009 Location: Norway Posts: 80 Rep Power: 17	Dear Foamers, Could anyone tell me the boundary condition for epsilon when we use LamBremhorst Turb model. The literature says there are two types of LB model . The change is only with BC for epsilon at walls. 1. Setting zero gradient for epsilon 2. Setting (nu. d2k/dy2 ) = 0 I presume k can be set as very low value at the wall and nut (turb viscosity) as zero gradient. If anyone can shed some light it would be useful. Thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
population balance model boundary condition	amir.s.z	FLUENT	0	December 28, 2009 08:16
RPM in Wind Turbine	Pankaj	CFX	9	November 23, 2009 05:05
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
The Boundary Condition about the Flat Plate	boing	Main CFD Forum	1	January 6, 2002 17:53

April 21, 2019, 07:25		#2
calf.Z Senior Member Jianrui Zeng Join Date: May 2018 Location: China Posts: 157 Rep Power: 8	I am wondering how I can set nu.d2k / dy2= 0 in epsilon boundary condition.