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

Lid driven cavity

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

LinkBack Thread Tools Display Modes
Old   August 5, 2009, 20:33
Unhappy Lid driven cavity
Join Date: Mar 2009
Posts: 40
Rep Power: 8
ganesh is on a distinguished road
Dear Friends,

I am working on developing an incompressible flow solver in 2D in a non-staggered framework as proposed in Mahesh (JCP, 2007). This method stores the Cartesian velocities and pressure at the cell centroids. The pressure is dropped from the momentum equation and a projection step leads to a pressure poisson equation, which is solved using some iterative procedure. While I find this to be working well on cartesian meshes, the same algorithm (which is designed and meant for unstructured meshes) gives non-physical results on traingulated meshes, but only those arising from traingulation of cartesian meshes. On these meshes, the solver does not fail but leads to only one large corner vortex instead of two corner vortices, but these are obesrved on coarser meshes such as a 30*30 cartesian mesh which was traingulated, by joining the diagonals. Triangulating in opposite direction leads to the same problem, surprisingly the position of the corner vortex is reversed. The test case is Re=100 in a [0,1]*[0,1] domain. I am surprised that the algorithm fails only for such kind of grids, and works well with quad meshes, boith cartesian and curvilinear and even for hybrid meshes, provided the right triangulation does not happen at the boundaries. For triangulated Delaunay meshes, no problems are seen. Has anyone encountered such an experience specific to right triangular meshes and driven cavity problem in the past ?

Thanks and Regards,

ganesh is offline   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
Lid driven cavity flow KK FLUENT 1 December 16, 2009 19:10
Lid Driven Cavity 3D Mathias Krause Main CFD Forum 5 October 17, 2006 06:34
lid driven cavity perumal Main CFD Forum 0 August 31, 2006 01:13
lid driven cavity by ghia jj Main CFD Forum 4 August 8, 2006 07:57
Benchmark (Lid driven cavity, ...) rt Main CFD Forum 3 April 1, 2006 09:27

All times are GMT -4. The time now is 13:52.