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

[Eddie Hansen]

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>
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>
> <zachbarfield60 at gmail.com>
> *À: *"Andy Sha Liao" <andy at f.energy> <andy at f.energy>
> *Cc: *"flash-users" <flash-users at flash.uchicago.edu>
> <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>
> <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>
>> 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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