CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

2D Implicit HLLC scheme

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 20, 2012, 05:28
Default 2D Implicit HLLC scheme
  #1
New Member
 
C.Harish
Join Date: Jun 2011
Posts: 15
Rep Power: 6
harish_0689@ is on a distinguished road
Hello, I have developed implicit HLLC scheme for the euler equations and tried to test it on some 2-dimensional cases. But i found few problems with it and do not know the reasons for it.
1) my CFL number is not going beyond 5 for the implicit case
2) supersonic cases are totally diverging.

can anyone tell me what is the problem, is it the nature of the HLLC implicit scheme or am i doing some mistake.

the matrix solver i am using is GMRES
harish_0689@ is offline   Reply With Quote

Old   January 21, 2012, 09:14
Default
  #2
Senior Member
 
duri
Join Date: May 2010
Posts: 130
Rep Power: 7
duri is on a distinguished road
HLLC scheme is best suited for high mach cases. Something might be problem with you implementation. To check you implementation first try with 1D Shock tube cases given in Toro.
duri is offline   Reply With Quote

Old   January 21, 2012, 14:22
Default
  #3
New Member
 
C.Harish
Join Date: Jun 2011
Posts: 15
Rep Power: 6
harish_0689@ is on a distinguished road
I have solved C_D nozzle problem which is a quasi 1d problem and it converged. Anyway i vl try the shocktube problem and check.
harish_0689@ is offline   Reply With Quote

Reply

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
Is it feasible to apply implicit scheme in LES EagleGao Main CFD Forum 2 October 24, 2011 14:04
implicit scheme for time step vivian Main CFD Forum 4 June 23, 2006 03:47
time_step, implicit scheme, number of iterations Isa Main CFD Forum 3 May 11, 2006 12:27
Komogrov time scale and implicit scheme for LES Li Yang Main CFD Forum 1 January 17, 2004 02:13
How to choose the CFL number with implicit scheme? D.T. Main CFD Forum 2 October 23, 2002 13:56


All times are GMT -4. The time now is 20:41.