negative volume with sphere

jafarizade · May 17, 2009, 06:13

hi
i want to model a natural convection over a sphere using fluent. u can see part of my mesh.
http://s2.largeimagehost.com/img/unt...tled1.JPG.html
the problem is that when the fluent is in 2d solve mode the grid check is ok and i have no problem but when fluent is in axisymmetric, the grid check sends negative volume error, i dont know waht is the problem i uses many kindes of mesh types even tri elememts but i cant solve the problem.

Ralf Schmidt · May 17, 2009, 10:23

Hi!

in 2D axis symmetric, the axis has to be identical with the x-coordinate (so flow from left to right or from right to left).
All points have to be on positive y.

Ralf

Philipov · May 21, 2009, 04:28

remesh the boundary of the sphere with more nods

May 17, 2009, 06:13	negative volume with sphere	#1
jafarizade New Member Ali Jafarizade Join Date: May 2009 Posts: 22 Rep Power: 17	hi i want to model a natural convection over a sphere using fluent. u can see part of my mesh. http://s2.largeimagehost.com/img/unt...tled1.JPG.html the problem is that when the fluent is in 2d solve mode the grid check is ok and i have no problem but when fluent is in axisymmetric, the grid check sends negative volume error, i dont know waht is the problem i uses many kindes of mesh types even tri elememts but i cant solve the problem.

May 17, 2009, 10:23		#2
Ralf Schmidt Member Ralf Schmidt Join Date: Mar 2009 Location: Austria Posts: 67 Rep Power: 17	Hi! in 2D axis symmetric, the axis has to be identical with the x-coordinate (so flow from left to right or from right to left). All points have to be on positive y. Ralf __________________ CFD - nothing but Colourful Fluid Dynamics

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May 21, 2009, 04:28		#3
Philipov Senior Member Svetlin Filipov Join Date: Mar 2009 Location: United Kingdom Posts: 176 Rep Power: 17	remesh the boundary of the sphere with more nods