variable grid spacing

Question

Hi, 

Are there any limitations in using the HydroHub Lite to "Add variable dX or dY region" to modify the spacing of one dimensiona and then to modify the other? 

It works well if I modyfy dX or dY only. When I modify both, then the "pre_aem3d.exe" accepts the new bathymetry file, but the "aem3d.exe" displays following error:

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Step:  1/20 SimDate: 2005-01-01 00:00:00 (2005001.0000)  Time: 11:39:43

forrtl: severe (157): Program Exception - access violation

Image              PC                Routine            Line        Source

aem3d.exe          00007FF77953A9A0  AEM3D_SCALAR_DIFF         351  aem3d_scalar_diffusion.f90

aem3d.exe          00007FF77953665E  AEM3D_SCALAR_DIFF          49  aem3d_scalar_diffusion.f90

aem3d.exe          00007FF7795142D0  AEM3D_TIMESTEP_LO         359  aem3d_timestep_loop.f90

aem3d.exe          00007FF779502A9C  MAIN__.P                  393  aem3d_main.f90

aem3d.exe          00007FF77A3BD582  Unknown               Unknown  Unknown

aem3d.exe          00007FF77A3C7EFC  Unknown               Unknown  Unknown

KERNEL32.DLL       00007FF9E23A7034  Unknown               Unknown  Unknown

ntdll.dll          00007FF9E24E2651  Unknown               Unknown  Unknown

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Answer 1

Modifying dx and then dy is fine.  My guess is there is a bug in the scalar diffusion code.  We don't generally use this as the numerical diffusion is usually sufficient.

If you send me your setup I'll have a look.

Chris

Comments

The problem was caused by "itemperature" and "idensity" turned off in the AEM3D configuration file.
I have turned out these features hoping, that it will speed up tests with various bathymetry inputs. It worked well until I have used a bathymetry input file with variable dX and dY.
Such bathymetry file can be used, but the "itemperature" or "idensity" has to be turned on first.
The problem is solved.

Nonetheless, I have snet my input files, in case you would like to have a closer look.

Rafal