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

convection dominated convection-diffusion problem

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 22, 2000, 15:25
Default convection dominated convection-diffusion problem
  #1
Kang, S. K.
Guest
 
Posts: n/a
I'm studying computational hydraulics. I want to develop 2D flood model as finite volume method. In depth-averaged 2D shallow water equation, the momentum equation has 2nd order diffusion terms which are sometimes ignored in modelling open channel flow. When diffusion terms are ignored (ie. eddy viscosity is set to zero) shallow water equations become hyperbolic, and usually used to model dam-break flow becuase of its hyperbolic property. Shock-capturing schemes are used with FVM or FDM.

When diffusive terms are not ignored the equations are parabloc and used to model circulation phenomena.

My Question :

When convection is dominant and diffusion is very small (but eddy viscosity is not zero), I want to use shock-capturing scheme (maybe TVD class) with FVM to simulate flood or dam-break flow. The governing equations are not strictly hyperbolic in this case. How should I solve this problem ??

Thanks for reading..

Regards
  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
Natural Convection Problem - Helium marzoa STAR-CCM+ 0 April 18, 2011 15:12
convection diffusion problem ali2108 OpenFOAM 1 May 30, 2009 23:17
convection diffusion equation in 2d ali2108 ANSYS 0 May 24, 2009 14:56
Forced convection Benchmark problem Raj FLUENT 0 January 28, 2009 07:10
Diffusion / convection I. Dotsikas Main CFD Forum 2 April 21, 1999 17:39


All times are GMT -4. The time now is 02:35.