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

F Difference/F Volume/ F Element

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

LinkBack Thread Tools Display Modes
Old   August 19, 1998, 11:11
Default F Difference/F Volume/ F Element
Posts: n/a
Can anyone summarise the difference bewteen the three methods, mentioned above. Also if anyone knowns, where I can obtain information related to the F.V.M, I would appreciate it.


  Reply With Quote

Old   August 20, 1998, 15:01
Default Re: F Difference/F Volume/ F Element
Ravi Krishnamurthy
Posts: n/a
Essentially the difference between the three methods is the way the solution is expanded on the finite mesh.

The basis function for the finite diff. method is a Dirac delta function with the solution independent on the neighbourhood mesh.

The Finite vol method has a unit step as the basis function with the solution constant over the mesh volume.

The Finite element basis in general is linear that is the 'hat' function.

Each of the above has a higher degree polynomial for the solution basis. This is altered for each of the above cases when more accuracy is required, like higher order spatial accuracuy by interpolation in F.D/F.V methods and increasing the polynomial fit in the F.E. methos, like quadratic elements.

A good starting point is the general CFD books like the one by Anderson, Tannehill and Pletcher.

  Reply With Quote

Old   August 21, 1998, 07:24
Default Re: F Difference/F Volume/ F Element
Posts: n/a
Thanks for your time.
  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
how to set periodic boundary conditions Ganesh FLUENT 13 January 22, 2014 05:11
BlockMesh FOAM warning gaottino OpenFOAM Native Meshers: blockMesh 7 July 19, 2010 14:11
On the damBreak4phaseFine cases paean OpenFOAM Running, Solving & CFD 0 November 14, 2008 22:14
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 12:55
Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Native Meshers: blockMesh 10 April 2, 2007 14:00

All times are GMT -4. The time now is 01:46.