Problem with Axisymmetric solver

ashishashish_5 · April 30, 2010, 03:28

Hi,

I am performing 2D axisymmetric simulation of flow in pipe.

I prep the initial mesh in gambit and have aligned the axis to the X-axis, prepared a simple Quad Map mesh and then exported a 2D mesh.

After importing it in Fluent, i checked the mesh and the minimum volume was +ve.

I switched on axisymmetric mode under solver, then again checked mesh, it shows a -ve volume.

What can be the reason?

Rami · May 4, 2010, 07:56

For axisymmetry you should make sure the radius is non-negative, otherwise negative volumes may be created.

April 30, 2010, 03:28	Problem with Axisymmetric solver	#1
ashishashish_5 New Member Ashish D. Shah Join Date: Jan 2010 Posts: 2 Rep Power: 0	Hi, I am performing 2D axisymmetric simulation of flow in pipe. I prep the initial mesh in gambit and have aligned the axis to the X-axis, prepared a simple Quad Map mesh and then exported a 2D mesh. After importing it in Fluent, i checked the mesh and the minimum volume was +ve. I switched on axisymmetric mode under solver, then again checked mesh, it shows a -ve volume. What can be the reason?

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May 4, 2010, 07:56		#2
Rami Senior Member Rami Ben-Zvi Join Date: Mar 2009 Posts: 155 Rep Power: 17	For axisymmetry you should make sure the radius is non-negative, otherwise negative volumes may be created.