## Fluids

#### how to improve mesh?

Subscriber

1.geometry

Ansys Employee

Ansys Meshing: Decomposition for hex meshing:
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Ansys Meshing: Meshing Methods:
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First check the locations of the bad elements. Please see following video for the same.

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Once you have locations, please check if you can improve mesh using different mesh sizing. Please see following video.

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If this does not help, you may need to check if you can use pinch control or virtual topology.

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If this does not help, please go to geometry and modify or simplify geometry at those locations in SpaceClaim.
Regards Keyur
Guidelines on the Student Community

Subscriber
how to rectify this error

Ansys Employee
Are you using multizone.
Please check tutorials on multizone. It would be better to split the geometry.

Ansys Meshing: Decomposition for hex meshing:
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Ansys Meshing: Meshing Methods:
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Regards Keyur
Guidelines on the Student Community

Subscriber
how to split the geometry?

• Rob
Ansys Employee
I tend to favour the Split command: have a look at the geometry tutorials.
Subscriber
where to where we have to split the body to get hex meshing
• Rob
Ansys Employee
If you want a hex mesh you'll either need logical cubes (not something I'd try) or sweep. Personally, I'd be looking at Fluent Meshing and just poly the whole thing. How are you getting on with the tutorials?
Subscriber
Ansys Meshing: Decomposition for hex meshing:
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I am unable to understand
• Rob
Ansys Employee
Which bit?
Subscriber
after slicing
mesh
How to improve the mesh? while solving i am getting floating point exception
• Rob
Ansys Employee
I'm assuming you checked the cell skew? What is causing the blocks to distort like that?
Subscriber
skewness - min 1.3057e-010, avg 6.0265e-002, max 0.97917
aspect ratio- min1.0002, max 82.067
orthogonal quality- min 2.0831e-002, max 1, avg 0.94992
element quality- min 3.6629e-003, max 1, avg 0.72873
these are the mesh quaities. how to improve skewness
• Rob
Ansys Employee
By understanding why the skew cells are created: why are they getting squashed in the image?
Subscriber
after meshing they squashed
• Rob
Ansys Employee
Look carefully, and use cut planes (show full cells) to see what's going on. Please post those images so I can see what's going on.