[FLASH-USERS] Chamber convergence LaserSlab Problem

[Kaldawi, Thomas]

I could be misunderstanding your problem, but the main difference I see between Fig A and C is that you want a minimum refinement level set. There is a variable in the flash.par file called lrefine_min that can set a lower level of refinement if that helps. If it’s something more specific most likely you will need to change one of the Grid_refine files.

Just email me back if you want more help.

Sincerely,

Thomas Kaldawi

On Jul 26, 2023, at 20:29, Sharma, Divyanshu Raj <sharma22 at llnl.gov> wrote:


Hi Flash User Group,

I was trying to see how chamber size would affect the pre-plasma generation in the LaserSlab example problem. The problem I ran into is that the AMR mesh between the two simulation runs had different mesh sizes even though in the flash.par file they had the same lrefine_max and set to be equal. I attached both the files above. An example of how the two simulation runs look like in visit can be seen here (Fig A, B). I have also put an example of how I believe the mesh (Fig A) should look (Fig C). I know I can just create a regular cartesian mesh with i,j,k procs but that would lead to longer runtimes without the AMR so I was wondering if there was any manual way to set the different AMR sizes based on like height in the z-direction in an R-Z problem.

Figure A. Chamber 450 target 10 mesh
<image001.png>

Figure B. Chamber 150 target 10 mesh
<image002.png>

Figure C. Hows Chamber 450 target 10 mesh should look like

<image003.png>


<flash_cham_150.par>
<flash_cham_450.par>
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