[FLASH-USERS] how to establish a 2D spherical model for laser ablation simulation?

[Ryan Farber]

Hi Yun,

You can set geometry = “polar” in your flash.par file to use r, theta coordinates. You might find adding information searching for polar geometry in the FLASH User Guide.

Best wishes,
Ryan

Sent from my iPhone

> On 28. May 2025, at 02:00, Yun Hu <huyun at mail.ustc.edu.cn> wrote:
> 
> 
> Hi, kind flash users:
>   I am just a beginner of FLASH, I want to use FLASH to simulate a laser irradiated CH sphere. I want to establish a 2D spherical model. But I found the examples in source of LaserSlab they us cylindrical coordination, but the parameters are (r,z), but what we want is (r,θ)，that means we want a modulate in the direction of θ。 I also found a sphere3D.par in LaserSlab，but the setup command need a Laser3D unit which can't be found in the LaserSlab unit. So, dear kind flash users, could you please instruct me how to establish a 2d spherical laser ablation models? Or is there any model files that can be shared or can be download anywhere? And what is the Laser3D unit?
> 
> Thank you very much
> Best wishes
> 
> 
> Yulin University
> 
> Yun Hu
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