CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Does a 2D finite volume triangular mesh

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

LinkBack Thread Tools Display Modes
Old   June 14, 2005, 09:06
Default Does a 2D finite volume triangular mesh
Posts: n/a

I was having a discussion today with a Senior Lecturer whose speciality is the Finite Element Technique & the following question emerged.

Does a 2D finite volume triangular mesh technique exist? Not a depricated quadritaleral, but a true 2D triangle. Is solid theory in place?

All books I have seen for FV seem to focus on structured quad meshes, or unstructured quad meshes.

Your comments would be welcomed.

  Reply With Quote

Old   June 14, 2005, 11:44
Default Re: Does a 2D finite volume triangular mesh
Hrvoje Jasak
Posts: n/a
Unstructured (well, arbitrarily unstructured) solvers exist today and have been around for ages. They can work on arbitrary polyhedral cells, and a 2-D triangle is (obviously) included.

The FVM theory does not change at all (you just throw the compass away); as for code implementation, this is a question of opinion - I consider it easier to work with polyhedra.


  Reply With Quote

Old   June 14, 2005, 16:06
Default Re: Does a 2D finite volume triangular mesh
Posts: n/a
Thanks Hrvoje... I was hoping that you would answer that one...

Do you have any links I could pursue?

Many thanks, diaw...
  Reply With Quote

Old   June 15, 2005, 03:00
Default Re: Does a 2D finite volume triangular mesh
Posts: n/a
Always remember this: In the FVM fluxes (convective and diffusive) are computed across control volume faces. A control volume is a general volume defined by a finite number of planar faces. Any polyhedral cell could therefore be used (including triangle). Convective and diffusive fluxes are expressed in terms of CELL values on either side of a face. In the process jou loop through FACES and not CELLS to generate your linearized algebraic equations. Each face then contributes to the coefficients and source terms of the cells on either side of it. Just keep in mind the orientation of a face area vector relative to a cell. It points outwards!! In other words if you have a face shared by two cells you need to change face area vector sign when summing across the neighbour cell of that face. For the neighbour cell the face area vector points inwards.

  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
3D Hybrid Mesh Errors DarrenC ANSYS Meshing & Geometry 11 August 5, 2013 06:42
channelFoam for a 3D pipe AlmostSurelyRob OpenFOAM 3 June 24, 2011 13:06
external flow with snappyHexMesh chelvistero OpenFOAM 11 January 15, 2010 20:43
2d irregular grid Remy Main CFD Forum 1 December 22, 2008 05:49
sliding mesh with Finite elements or finite volume tool Main CFD Forum 0 October 9, 2008 10:07

All times are GMT -4. The time now is 01:24.