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[ANSYS Meshing] Help with Mesh/Geomety of 2-D Axisymmetric Geometry

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Old   July 1, 2015, 02:00
Default Help with Mesh/Geomety of 2-D Axisymmetric Geometry
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Hello All,

I posted a recent thread about this, but I have now understood what my problems are, after reading different user guides and different threads.

These are the warnings I am receiving:

1)WARNING: left-handed faces detected on zone 9: 9 right-handed, 158 left-handed......

2)WARNING: Invalid axisymmetric mesh with nodes lying below the x-axis.....

3)WARNING: The mesh contains high aspect ratio quadrilateral,
hexahedral, or polyhedral cells.
The default algorithm used to compute the wall
distance required by the turbulence models might
produce wrong results in these cells.
Please inspect the wall distance by displaying the
contours of the 'Cell Wall Distance' at the
boundaries. If you observe any irregularities we
recommend the use of an alternative algorithm to
correct the wall distance.
Please select /solve/initialize/repair-wall-distance
using the text user interface to switch to the
alternative algorithm.

Background on my project:
Geometry is a 2-D long rectangle with one side being axisymmetric (30mm Height x 1m length) - representing a 60mm Dia tube 1m in length

My geometry has a 3mm wall thickness.

For Error 1): I understand that this is caused due to my mesh being very non-conformal since I have a solid-fluid boundary interface. Meaning the mesh in the wall will be differently shaped than the mesh in the fluid domain. This might be due to the bias factors that I have but I must include it.

For Error 2): Since I have selected Axisymmetric in the solver settings, I understand that my geometry and mesh need to be in the same quadrant, so that the x-axis is my line of symmetry. It currently shows that it isn't. I am confused with this because when I created my geometry I made certain that my rectangle was drawn above the x-axis.

Therefore, I have tried several times to use the TUI commands but it is not working for me.
In Warning 3) it says you can try to use a different algorithm, but I would like to avoid that because I believe this setup should be much easier.

How can I put my mesh and geometry in one quadrant if I have already drawn the rectangle in one quadrant in the design modeler?

How can I better repair the left-handed, right-handed faces?

Please let me know if there is any other information needed to understand my setup. Or better snapshots

Thank you very much.
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Old   July 1, 2015, 02:01
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