[ANSYS Meshing] Orthogonality

mnolan93 · April 11, 2015, 11:34

hi guys,

im having real trouble getting my quad mesh to be orthogonal. Its a pipe, 2d axisymmetric, with a square orifice plate. Im using inflation layers as per best practice guidlines. However no matter what I do I cant get the mesh to be orthogonally perfect :/ my geometry should mean that it is quite easy to do so? My orthogonal quality is 0.59. This is for a university project and the deadline is approaching and nobody seems to know hwo to fix my problem :/ any advice available?

Thanks!

vasava · April 13, 2015, 03:45

Are you judging your mesh solely on basis of information in Ansys meshing? Have you tested the mesh quality with Fluent?

Ansys meshing always complains about mesh quality especially when boundary layers are involved. This may be due to the fact that the layer thickness is very small in-comparison to the sides or the triangle/quadrilateral.

why? · April 13, 2015, 20:59

minimum of 0.59 is more than enough, solvers accept quality as low as 0.05, so if the min is mroe than 0.05 no need to worry. just imagine, are your mesh cells perfect squares? no, then how can you expect the quality to be 1, 0.59 is perfect in my opinion...

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April 13, 2015, 03:45		#2
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	Are you judging your mesh solely on basis of information in Ansys meshing? Have you tested the mesh quality with Fluent? Ansys meshing always complains about mesh quality especially when boundary layers are involved. This may be due to the fact that the layer thickness is very small in-comparison to the sides or the triangle/quadrilateral.

April 13, 2015, 20:59		#3
why? New Member Join Date: Apr 2015 Posts: 16 Rep Power: 11	minimum of 0.59 is more than enough, solvers accept quality as low as 0.05, so if the min is mroe than 0.05 no need to worry. just imagine, are your mesh cells perfect squares? no, then how can you expect the quality to be 1, 0.59 is perfect in my opinion...