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

an alternative to quadtree cartesian grids?

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

LinkBack Thread Tools Display Modes
Old   February 9, 2007, 20:50
Default an alternative to quadtree cartesian grids?
Posts: n/a
In cartesian finite volume methods every control volume normally has one adjacent volume on the east, west, north and south side. This leads to equations like:

Ap*Cp+ As*Cs + An*Cn + AW*Cw + Ae*Ce=Qc

for every cell.

In case we would like to refine the grid on certain locations it would be handy to have two neighbour cells on one side. A possible solution is using the cartesian quadtree grids where we have grids on different levels.

Is it possible to use a different approach? We could for instance use the two neighbours directly in the balance equation

This would lead to equations like:

Ap*Cp + As1*Cs1+As2*Cs2 + An*Cn + AW*Cw + Ae*Ce=Qc

if we have two cells on the south side and one cell on the other sides. Is such an approach possible? Or will this lead to numerical problems for instance with a pressure correction method?

Since I have never seen such an approach there must be a problem which is not yet obviously to me.



  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
Time step at coarse grids D3sT Main CFD Forum 0 December 6, 2010 12:15
structured and unstructured grids user Main CFD Forum 6 November 25, 2010 02:14
How to partition cartesian grid for MPI in fortran CF Main CFD Forum 3 January 17, 2008 05:38
A question about dynamic overset grids JXIA Main CFD Forum 4 January 10, 2008 04:50
Can I define grids motion as a time functions Darcy CFX 4 March 29, 2001 21:14

All times are GMT -4. The time now is 06:23.