Initial velocity profile

October 26, 2001, 05:11

Hello dear CFX users !

In order to decrease the domain simulation of my channel (i need to have developped profiles), i would to use a well know logarithmic vertical velocity profile in entrance : u+=(1/Kappa)log(Ey+). But i don't know why, can semeone help me ? I use CFX-4.3 & 4.4.

Thanks a lot.

Patrice

October 26, 2001, 08:06

Easy: use subroutine USRBCS to implement your velocity profile. If you need to modify the law of the wall to implement arough law you can do that in USRWTM. I'm sure bthere are examples of this in the manual.

October 26, 2001, 05:11	Initial velocity profile	#1
Patrice Jaumouillie Guest Posts: n/a	Hello dear CFX users ! In order to decrease the domain simulation of my channel (i need to have developped profiles), i would to use a well know logarithmic vertical velocity profile in entrance : u+=(1/Kappa)log(Ey+). But i don't know why, can semeone help me ? I use CFX-4.3 & 4.4. Thanks a lot. Patrice

October 26, 2001, 08:06	Re: Initial velocity profile	#2
Herve Guest Posts: n/a	Easy: use subroutine USRBCS to implement your velocity profile. If you need to modify the law of the wall to implement arough law you can do that in USRWTM. I'm sure bthere are examples of this in the manual.

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