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Edge length ratio at end walls of turbine blade - Mesh Quality

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Old   August 27, 2015, 02:46
Smile Edge length ratio at end walls of turbine blade - Mesh Quality
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AGNIMITRA
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Hi,
I find that I have a mesh around y+ value of 10. I have gone through the mesh guidelines required for CFX Solver. All the mesh metrics are decent except edge length ratio (270) which is expected to be less than 100. Is it permissible at the endwalls? The mesh calculator in CFD post yields the below values. Kindly advise if my mesh is up to the mark.

Maximum Face Angle
Min: 90 [degree] Max: 131.972 [degree]
Minimum Face Angle
Min: 46.2862 [degree] Max: 90 [degree]
Edge Length Ratio
Min: 1.16725 Max: 270.024
Connectivity Number
Min: 1 Max: 10
Element Volume Ratio
Min: 1 Max: 2.71612
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Old   August 27, 2015, 03:19
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That is also known as aspect ratio. This can be pretty high in boundary layer and I have used my self up-to 10,000 for double precision solver without any problem.
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Old   August 27, 2015, 08:07
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The mesh quality required for a simulation is highly dependant on the simulation. For instance aspect ratios of 10000 in boundary layers can be fine - but for surface tension models if the aspect ratio goes higher than 1.5 you are going to loose a lot of accuracy.
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Old   January 6, 2021, 19:23
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Hello to everyone! I have also meshed my multi-stage turbine model through Ansys TurboGrid. When I use the highest mesh quality with no errors at all, my solution can't reach the convergence criteria. Otherwise, when i use a coarser mesh, aspect ratio error occurs and its value is about 2000-2500. Could I ignore this error and proceed to solution ? Could i check my results by doing a mesh independence study even if the error exists ?

Attach any related references to check if i mished something.
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