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Issue when using grid stretching

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Old   September 13, 2021, 10:37
Default Issue when using grid stretching
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Joao Brazao
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Hi everyone, hope you're all well.

I've been optimising a model by changing the resolution of the grid in the area where I intend to place the solid of interest. Once I add grid stretching with option 8 - "three zones with constant d[...]" - the execution of Reef3D fails with the following message:
ERROR detected by Hypre ... BEGIN
ERROR -- hypre_BiCGSTABSolve: INFs and/or NaNs detected in input.
User probably placed non-numerics in supplied b.
Returning error flag += 101. Program not terminated.
ERROR detected by Hypre ... END
It runs without issues when I use a cubic cells size and a rectangular domain.

Does anyone have the same issue when running the input files?

Thank you in advance.

My system details for reference:

Model Name: MacBook Pro
Model Identifier: MacBookPro15,1
Processor Name: 6-Core Intel Core i7
Processor Speed: 2.6 GHz
Number of Processors: 1
Total Number of Cores: 6
Memory: 16 GB
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Old   September 14, 2021, 03:45
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Arun Kamath
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Use B 2 to define the total number of cells. Otherwise the maximum number of cells is undefined and thus the decomposition incomplete.


Also you can use the output DIVEMesh-Non-Uniform-Mesh.txt to look at the max and min sizes and their locations.

Include B 130 1 and you get gridSpacing.vtk which shows you the grid in Paraview.
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Old   September 15, 2021, 13:28
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Joao Brazao
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Quote:
Originally Posted by kamath View Post
Use B 2 to define the total number of cells. Otherwise the maximum number of cells is undefined and thus the decomposition incomplete.


Also you can use the output DIVEMesh-Non-Uniform-Mesh.txt to look at the max and min sizes and their locations.

Include B 130 1 and you get gridSpacing.vtk which shows you the grid in Paraview.
Hi Arun, thank you, that certainly helped test a bit more. The B130 is very handy for troubleshooting.

Edit: found the issue that was remaining in my interpretation of how the code in B 123 is used. The z1 and z2 are the absolute coordinate where to start the following section - I though they were additive to each other.

Thank you once again. Good stuff this.
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