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

Solving euler eq on unstructured grid: how do i transform the flux back...?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 15, 2012, 06:07
Default Solving euler eq on unstructured grid: how do i transform the flux back...?
  #1
New Member
 
CsNemes
Join Date: Feb 2012
Posts: 1
Rep Power: 0
csnemes is on a distinguished road
Hi all,
i am quite new, sorry if the title of my question is a little clumsy.
(if you give a better one i will correct it)

My problem looks simple, and i have already a working c++ program.
But there is just one thing that i cannot accept.

So there is the Euler eq.
We are on an unstructured grid. (Triangles.)
We solve it with the first order Euler method.

Therefore I need the divergence of the flux.
I transform my speed vector from my global coordinate system to the local coordinate system of one of the face of the given triangle.

What is the flux at the face?
I average the flux of the flux of neighboring triangles.
Then i take the normal component of the flux. (normal to the face)

And here is my question:

Do i have to transform the flux to sum it up over the 3 faces of the given triangle? How?
(Now i have a working code which only transform rhou end rhov back.)
(2 dimensional problem)

Thank you.
csnemes is offline   Reply With Quote

Reply

Tags
euler, flux, unstructured grid

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
High Courant Number @ icoFoam Artex85 OpenFOAM Running, Solving & CFD 9 January 3, 2012 08:06
Multiple floating objects CKH OpenFOAM 10 September 21, 2011 23:13
Velocity blows up suddenly after 30,000+ iterations lordvon OpenFOAM 14 October 27, 2010 11:13
Error log vw.cfd OpenFOAM 6 August 7, 2009 05:44
Parallel rasInterFoam openfoam_user OpenFOAM Running, Solving & CFD 4 November 1, 2008 05:14


All times are GMT -4. The time now is 09:49.