Laminar Flow

Pavelko · August 18, 2010, 04:46

Hi all ,

Do anyone has a tutorial on laminar flow .
I'm trying to simulate laminar steady state flow in rigid pipe - I have good results , but there is some velocity on the wall (that was defined as no-slip wall) .

Do anyone one what the problem may be ?

Thanks ,
Pavelko .

ghorrocks · August 18, 2010, 06:52

I seem to remember answering this question before. There is no error with the implementation of no slip walls in CFX. The problem is that your wall point is either not exactly on the wall or has included the control volume adjacent to the wall and is therefore not zero.

Pavelko · August 18, 2010, 07:35

Just to be sure that my approach is right :
-----------------------------------------
Geometry - I've created the cylinder , defined it as a fluid , meshed it , and set up the outer radius of cylinder as a wall .
Is it right ?

ghorrocks · August 18, 2010, 07:39

Your approach is correct. The problem is in your post processing, not the simulation.

Pavelko · August 18, 2010, 07:51

Thank you very much ! Those are good news for me

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Boundary Layer of Laminar Flow over a Flat Plate	Blasius_Pohlhausen_Crocco	Main CFD Forum	12	September 30, 2013 17:35
How to enforce laminar flow while using k-e	Grzegorz Kondora	FLUENT	0	January 28, 2009 10:35
a laminar flow and heat transfer problem	majestywzh	FLUENT	1	April 16, 2003 03:39
grid for laminar flow	kim	FLUENT	2	April 4, 2002 02:44
Inviscid Drag at subsonic, subcritical Mach #	Axel Rohde	Main CFD Forum	1	November 19, 2001 12:19

August 18, 2010, 06:52		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	I seem to remember answering this question before. There is no error with the implementation of no slip walls in CFX. The problem is that your wall point is either not exactly on the wall or has included the control volume adjacent to the wall and is therefore not zero.

August 18, 2010, 07:35		#3
Pavelko Member Pavelistyj Join Date: Jul 2010 Posts: 42 Rep Power: 15	Just to be sure that my approach is right : ----------------------------------------- Geometry - I've created the cylinder , defined it as a fluid , meshed it , and set up the outer radius of cylinder as a wall . Is it right ?

August 18, 2010, 07:39		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Your approach is correct. The problem is in your post processing, not the simulation.

August 18, 2010, 07:51		#5
Pavelko Member Pavelistyj Join Date: Jul 2010 Posts: 42 Rep Power: 15	Thank you very much ! Those are good news for me