CFD Online Logo CFD Online URL
Home > Forums > CFX

Is it possible to influence the velocity of an scalar transport equation?

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   January 9, 2010, 19:05
Default Is it possible to influence the velocity of an scalar transport equation?
New Member
Join Date: Jan 2010
Posts: 5
Rep Power: 10
jannnesss is on a distinguished road
Hey everyone!!

Is there any possibility to influence the velocity of an scalar transport equation. I want to reach the scalar is transportet by another velocity than the flow velocity.
For example: the transported scalar should move with a fix (very small) velocity in the radial direction of a pipe, when the main flow is in the direction of the pipe.
Thanks a lot!
With best regards, Jan
jannnesss is offline   Reply With Quote

Old   January 11, 2010, 13:02
Tristan Burton
Join Date: Mar 2009
Posts: 43
Rep Power: 10
Tristan is on a distinguished road

What's the physical mechanism here? Can you get the radial advection with a modification to the diffusion coefficient? If you don't want advection due to the flow velocity, it seems like you should use a diffusive transport equation and adjust the diffusion coefficient to get the desired behavior. I know that in turbulent particle-laden flow modelling they talk about particle "diffusion" even though particles don't really diffuse, but their response to the turbulent velocity fluctuations can be treated as a "diffusion".

Tristan is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Scalar transport equation dimension problem litonx OpenFOAM Running, Solving & CFD 3 March 2, 2007 07:49
Velocity in Porous medium : HELP! HELP! HELP! Kali Sanjay Phoenics 0 November 6, 2006 07:10
transport equation for SGS scalar variance chinthakindi Main CFD Forum 0 April 27, 2004 09:26
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13
Scalar Transport Equations 123 Main CFD Forum 6 August 10, 1998 09:05

All times are GMT -4. The time now is 00:25.