Menu

Discussion Forum

New Discussion
Filter

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Turbulence length for 3d flow

Posted Mar 8, 2011, 2:24 a.m. EST Computational Fluid Dynamics (CFD) Version 4.1 1 Reply

mb
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi all,

what is an appropriate turbulence length for the inlet of a 3D channel. Can I use 0.07*channel_width as recommended in the doc for the 2D case?

Regards, Marcel
1 Reply Last Post Mar 8, 2011, 10:21 p.m. EST
Jim Freels mechanical side of nuclear engineering, multiphysics analysis, COMSOL specialist
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 8, 2011, 10:21 p.m. EST
That estimate is as good as any. It is not an exact science. You can prove this to yourself by using various values for the inlet turbulence, then realize that the difference is small downstream enough from the inlet.
That estimate is as good as any. It is not an exact science. You can prove this to yourself by using various values for the inlet turbulence, then realize that the difference is small downstream enough from the inlet.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content