Wall FUNCTIONS

maritozzo · December 6, 2005, 15:12

I decided to use standard K epsilon model with wall function. When I decide to use wall function i have to set zeroGradient for both K and epsilon as boundary condition, but if I use a wall function which is the value of the velocity U that I have to specify at the walls if they are not a fixed walls in other words not moving walls.
Please Answer

maritozzo · December 6, 2005, 15:14

I made a mistake sorry. THE WALLS ARE NOT MOVING THEY ARE FIXED

guido_adriaensen · December 7, 2005, 03:17

Hello,

Actually that is quite simple, just set:
value uniform (0 0 0)
I.e. no motion of the walls.

Guido

December 6, 2005, 15:12	I decided to use standard K ep	#1
maritozzo Member Muzio Grilli Join Date: Mar 2009 Posts: 36 Rep Power: 17	I decided to use standard K epsilon model with wall function. When I decide to use wall function i have to set zeroGradient for both K and epsilon as boundary condition, but if I use a wall function which is the value of the velocity U that I have to specify at the walls if they are not a fixed walls in other words not moving walls. Please Answer

December 6, 2005, 15:14	I made a mistake sorry. THE WA	#2
maritozzo Member Muzio Grilli Join Date: Mar 2009 Posts: 36 Rep Power: 17	I made a mistake sorry. THE WALLS ARE NOT MOVING THEY ARE FIXED

December 7, 2005, 03:17	Hello, Actually that is qui	#3
guido_adriaensen Member Guido Adriaensen Join Date: Mar 2009 Posts: 56 Rep Power: 17	Hello, Actually that is quite simple, just set: value uniform (0 0 0) I.e. no motion of the walls. Guido

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