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

Flux splitting for compressible flow using finite difference method

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

Like Tree3Likes
  • 1 Post By FMDenaro
  • 2 Post By sbaffini

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 7, 2020, 08:18
Default Flux splitting for compressible flow using finite difference method
  #1
New Member
 
Amr Emad Ezzat
Join Date: Oct 2019
Posts: 9
Rep Power: 5
Amr Emad Ezzat is on a distinguished road
Hello,

Is there any resource or algorithm for how to apply the flux splitting upwind method for compressible flow using the finite difference method so I can follow?

I want to simulate shockwave reflection on a surface and the central scheme did not do well in this situation.
Amr Emad Ezzat is offline   Reply With Quote

Old   February 7, 2020, 09:55
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,192
Rep Power: 66
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
Quote:
Originally Posted by Amr Emad Ezzat View Post
Hello,

Is there any resource or algorithm for how to apply the flux splitting upwind method for compressible flow using the finite difference method so I can follow?

I want to simulate shockwave reflection on a surface and the central scheme did not do well in this situation.

Have a look here http://www.clawpack.org/gallery/index.html


of course in the framework of "flux" splitting you have to think about the FV formulation.
Amr Emad Ezzat likes this.
FMDenaro is offline   Reply With Quote

Old   February 10, 2020, 06:13
Default
  #3
Senior Member
 
sbaffini's Avatar
 
Paolo Lampitella
Join Date: Mar 2009
Location: Italy
Posts: 1,940
Blog Entries: 29
Rep Power: 36
sbaffini will become famous soon enoughsbaffini will become famous soon enough
Send a message via Skype™ to sbaffini
I am afraid that there is no such concept as flux splitting in FD, as it specifically involves splitting a flux on a given face in relation to the underlying Riemann problem there.

You can certainly arrange a FV approach on the same FD grid you are using and convert it back to the FD formulation, but that would require some arbitraryness in positioning FV faces. Then, why not just using FV?

FV schemes are typically built as interpolation to faces + limiting + riemann problem. Flux splitting only solves one of the three parts of the scheme. FD schemes, in contrast, are typically built as a single piece for a convective derivative.
ssh123 and Amr Emad Ezzat like this.
sbaffini is offline   Reply With Quote

Reply

Tags
cfd code, compressible flow, finite difference method, flux spliting, navier stokes equations

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
Issues on the simulation of high-speed compressible flow within turbomachinery dowlee OpenFOAM Running, Solving & CFD 11 August 6, 2021 07:40
Mesh generation geometry using finite difference method -irregular geometry manuc Mesh Generation & Pre-Processing 0 February 26, 2016 08:10
The fundamental difference between Finite Difference and Finite Volume Methods vikramaditya91 Main CFD Forum 3 January 14, 2016 05:13
fluid flow but temperature raises from nowhere? mxcfd STAR-CCM+ 5 September 16, 2014 06:46
Solid-Liquid Two Phase Flow Numerical Simulation with the Finite Element Method Qing Hao Main CFD Forum 2 January 9, 1999 00:31


All times are GMT -4. The time now is 14:52.