CFD Online Logo CFD Online URL
Home > Forums > CD-adapco

converging-diverging nozzle

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

LinkBack Thread Tools Display Modes
Old   May 27, 2002, 06:51
Default converging-diverging nozzle
seok Jang
Posts: n/a
Hi... I deal with converging-diverging nozzle(ISO 9300).

solution : 2D-compressible, steady-state, laminar

1) Nozzle throat diameter(d) = 4.48mm, inlet radius = 2d, nozzle length = 7.43d, nozzle expansion half angle = 4 degree.

2) Boundary condition : *Stagnation(upstream) : P=2e+05, T=20, direction=normal *Pressure(exit) : open air(P=0) *Symmetry *Wall : Np-slip

3)Thermophysical..... *Molecular Properties -density = Ideal-f(T,P) *Turbulence off *Thermal off *Refference data : press=1e+05, temp.=273, Cell NUmber=1(inlet point)....

there is no convergence after 1000 iterations.

What is the problem? Please, teach me. Thanks.....
  Reply With Quote

Old   June 3, 2002, 11:50
Default Re: converging-diverging nozzle
Posts: n/a
Check your Reynolds number. I guess you should have turbulent flow. Also you can reduce the Relaxation paraeters and check
  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
VOF, Diverging or not? Renato Pacheco FLUENT 0 April 10, 2008 12:21
Converging then Diverging Residuals??? Erika Johnson FLUENT 8 September 19, 2006 10:45
Bluff body in converging/diverging channel Sergei Chernyshenko Main CFD Forum 0 August 11, 2006 17:11
Data on Converging-Diverging Nozzle; Mohammad Main CFD Forum 0 September 5, 2002 23:55
Converging-Diverging part Jungyoon hahm FLUENT 4 December 15, 2000 09:19

All times are GMT -4. The time now is 06:52.