CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

turbulent mixing layers

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

LinkBack Thread Tools Display Modes
Old   December 23, 2000, 09:12
Default turbulent mixing layers
ABDOU chaabane
Posts: n/a
hi Mr need the boundary conditons for the mixing layers ant the intiales conditions. thanks a lot.
  Reply With Quote

Old   December 23, 2000, 13:02
Default Re: turbulent mixing layers
Ghanshyam Singh
Posts: n/a
For gods sake, dont ask such a vague question. Please be specific, specially with turbulence!!

  Reply With Quote

Old   December 23, 2000, 13:40
Default Re: turbulent mixing layers
John C. Chien
Posts: n/a
(1). Yes. It is useless to use short paragraphs, if one can not get the message through. It is better to state the problem three times in three different angles. (2). Before the mixing, there must be a plate separating the two stream, therefore, you must take into account the existence of the dividing wall. (3). When the two streams meet at the trailing edge of the dividing plate, the flow field can be rather complex due to the geometry of the plate at the trailing edge. This is important, because it will impact on the solution. (4). Now ahead of the trailing edge, you have two separate streams or flow over a plate (wall), so, each stream will have a wall condition. (5). An at the place where the initial condition is known, you can set the initial condition there for each stream. And this will be the initial condition for your problem. You can specify the initial (inlet) condition of each stream as a uniform condiiton, or non-uniform condition (specify the profile). (6). As for the downstream condition, a simple parallel flow condition is adequate. (7) In other words, you will have a large box with a dividing plate in the middle, extending from the inlet location into the computational domain for a certain distance. That dividing plate will have an upper and lower wall, including the trailing edge geometry. The upper and the low outer boundary can be set to the corresponding inlet conditions. ( you can run a few cases with different domain sizes to check the effect of the outer boundary conditions) (8). This is a fairly standard problem, but you must start the computation before the two streams meet.
  Reply With Quote

Old   December 25, 2000, 23:58
Default Re: turbulent mixing layers
Posts: n/a
hi: I had 2D & 3D mixing layer codes(subsonic & supersonic,Navier-Stokes eqs)but i solved plane mixing layer
  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
Turbulent Mixing Layers Kieran Hood Main CFD Forum 2 April 27, 2007 07:06
Turbulent eddy diffusivity for mixing?? Ray Main CFD Forum 0 March 22, 2001 06:07
B.C. for turbulent mixing layers Jason Main CFD Forum 2 May 12, 2000 13:34
Grid for turbulent mixing layers Jason Main CFD Forum 1 March 11, 2000 22:56
turbulent mixing of two fluids ulrich bieder Main CFD Forum 2 October 9, 1999 16:15

All times are GMT -4. The time now is 06:26.