Vis multicuts

[ejyoo921]

Summary

Visualization of multi-cut locations.

1. In the input file, you can add eb2.plt_multiple_cuts = "true" to produce plot files to see the multi-cut cells.
   -> The description was added to the RuntimeParameters.rst file.

• Note: If "eb2.plt_multiple_cuts" is true, we abort the code after creating the plot files. This is in the AMReX_EB2_Level.H.

2. For a 3D case, you would get up to three plot files: plt.multicut.x, plt.multicut.y, and plt.multicut.z.

This depends on which face has multi-cut issues.
-> See AMReX_EB2_3D_C.cpp

3. For a 2D case, the output name is plt.multicut.
   -> See AMReX_EB2_2D_C.cpp

4. For any dimension, a cell value of 2 indicates regular, 0 means covered, and values greater than 2 indicate multi-cut cells.

Additional background

Checklist

The proposed changes:

• fix a bug or incorrect behavior in AMReX
• add new capabilities to AMReX
• changes answers in the test suite to more than roundoff level
• are likely to significantly affect the results of downstream AMReX users
• include documentation in the code and/or rst files, if appropriate

[WeiqunZhang]

Plotfile is for cell-centered data only. But the data you want to save are face data.

[ejyoo921]

Plotfile is for cell-centered data only. But the data you want to save are face data.

I can change them into cell-centered data. Would that be okay?

[ejyoo921]

I changed the face-centered cells to cell-centered cells for visualizations. It cannot precisely show which face has the multi-cut issue; however, the name of the plot files shows what direction of faces has a problem. For example, "plt. multi cut.x" would contain multi-cut cells having issues on x-direction faces.