[FLASH-USERS] [EXT] Re: Laser across a 1D domain

[David Blackman]

Yeah, that also make sense, as simulating he plasma expanding laterally 
through the lasers radial beam profile. It still makes more sense to do 
that as a 2D cylindrical simulation though surely? Would the absorption 
physics even work like that in 1D?

On 16/08/2021 08:26, Eddie Hansen wrote:
> If I understand correctly, the objective is to have a laser that 
> travels in the axial direction (perpendicular to the radius), and the 
> beam has a radial profile. He wants to simulate in 1D cylindrical and 
> observe plasma expansion radially.
>
> On Mon, Aug 16, 2021, 10:13 AM David Blackman <drblackman at eng.ucsd.edu 
> <mailto:drblackman at eng.ucsd.edu>> wrote:
>
>     I'm not sure I understand exactly what you are trying to do. What
>     you asking doesn't seem to make sense. The laser will travel along
>     the radius, yet your super Gaussian profile will be spatially
>     varying at 90 degrees to the radius, and you want to do it in 1D.
>     I suspect you want a polar geometry with the laser traveling in
>     from the radius, right?
>
>     Maybe look at the 2D laser slab? You might be able to put
>     something together with cylindrical geometry, you could model it
>     as a circle arc at the end of a tube with the laser coming in from
>     the longitudinal direction maybe? Otherwise a well refined
>     Cartesian grid might be better.
>
>     On 16/08/2021 07:59, Thibault Goudal wrote:
>>     Hello,
>>     just to contribute to the conversation, in the example1d.par, the
>>     geometry is cartesian. I haven't seen explicitely a flash.par
>>     input deck including 1D spherical geometry and laser energy
>>     deposition.
>>     I'm not sure that it's possible so far unless mimicing a
>>     spherical geometry with cartesian/cylindrical mesh but not
>>     confident of catching the physics accurently.
>>
>>     ------------------------------------------------------------------------
>>     *De: *"Zach Barfield" <zachbarfield60 at gmail.com>
>>     <mailto:zachbarfield60 at gmail.com>
>>     *À: *"Andy Sha Liao" <andy at f.energy> <mailto:andy at f.energy>
>>     *Cc: *"flash-users" <flash-users at flash.uchicago.edu>
>>     <mailto:flash-users at flash.uchicago.edu>
>>     *Envoyé: *Lundi 16 Août 2021 16:39:16
>>     *Objet: *Re: [FLASH-USERS] Laser across a 1D domain
>>
>>     Yes,
>>     In example1d.par the laser is a single ray that propagates along
>>     the radius. I am interested in sending a spatially-varying
>>     (supergaussian) laser across the radius.
>>
>>     -Zach
>>
>>     On Mon, Aug 16, 2021 at 10:20 AM Andy Sha Liao <andy at f.energy>
>>     <mailto:andy at f.energy> wrote:
>>
>>         Zach,
>>
>>         Have you looked at example1d.par in LaserSlab?
>>
>>
>>         Andy
>>
>>         On Mon, Aug 16, 2021 at 9:05 AM Zach Barfield
>>         <zachbarfield60 at gmail.com <mailto:zachbarfield60 at gmail.com>>
>>         wrote:
>>
>>             Hello all,
>>             Does anyone know how to simulate a laser impinging
>>             /across/ the radius of a 1D radial domain?
>>             It seems to me that FLASH has no capability of including
>>             dimensionality in the laser beam when using a 1D
>>             geometry, is this true?
>>
>>             I am using a 1D radial domain because I would like to
>>             simulate the laser heating of a cylinder of gas with an
>>             approximately infinite z-dimension. I am only interested
>>             in the temporal evolution of the radial profile.
>>
>>             Cheers,
>>             Zach Barfield
>>
>>
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