CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

jet impingement

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

LinkBack Thread Tools Search this Thread Display Modes
Old   January 11, 2005, 13:44
Default jet impingement
Posts: n/a
hi, i need to simulate a circular jet impingement on a flat plane. i tried using a 2D axisymmetrical configuration, but it didnt work. Now, i am trying to design a 3D model, it is fairly easy, but i wanna keep the number of elements in gambit below 2.5 million. does anyone have any suggestion in general? i need a big model to use pressure far field, because i used pressure outlet and got more than 17 thousand reversed flow, and of course,i didnt converged appropriately. thanks.
  Reply With Quote

Old   January 12, 2005, 02:26
Default Re: jet impingement
Posts: n/a
2D axisymmetrical configuration works perfectly. For both 2D and 3D simulations, use fine mesh near ground plane and also near the edges of the circular jet pipe. Use pressure Boundary conditions. Also it is better to post your real name instead of pseudo ones.
  Reply With Quote

Old   January 13, 2005, 04:06
Default Re: jet impingement
N Menon
Posts: n/a
what are you trying to model? a supersonic jet impingement case or a subsonic one?

you are bound to get reversed flow on the pressure utlets as the flow exiting your domain through the pressure outlet will set up a slight recirculation zone (magnitudes of velocity are orders smaller than the mean jet flow). it should not affect convergence though. it might also be useful to decide what property is best utilised for convergence, we have found good acceptance with literature (supersonic jet impingement case)when using the pressure outlet mass flow as a convergence criterian. pertubations in shear layers in the case of the supersonic impingement always pose problems in getting all residuals to converge to the set convergence criterian.

  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
HELP: jet impingement heat transfer Student8X FLUENT 0 July 18, 2011 10:01
evaporation from surface with jet impingement Andrea FLUENT 0 March 28, 2007 13:54
Free Surface Jet Impingement John FLUENT 0 July 14, 2006 04:45
Water Jet Impingement Ahmed Omar CFX 0 April 13, 2006 19:20
JET IMPINGEMENT G.Balakrishnan FLUENT 1 December 9, 2000 13:17

All times are GMT -4. The time now is 03:54.