[FLASH-USERS] question about radslab

[Youssef Abouhussien]

Hi Eddie,

Thank you for your email. I still want the radiation transport (hence
wavelengths of the photons) to be carried out at a specific temperature. If
I modified "urad_tot = urad_tot + urad(g)" from  RadTrans_mgdUFromT.90 file
and multiplied it by a constant to decrease the energy deposited to match
the intensity i have in mind; would that work? Thanks.

Regards,
Youssef


*------------------------------------------------------------------------------------------------------*
*Youssef Abouhussien*
*Research Assistant*
*Doctoral Student*
Virginia Commonwealth University
Dept. of Mechanical and Nuclear Engineering


On Wed, Jan 8, 2025 at 6:58 PM Hansen, Eddie <ehansen at pas.rochester.edu>
wrote:

> Hi Youssef,
>
>
>
> The BC for RadSlab is not spatially-varying; it is just a single radiation
> temperature along the entire Yl boundary (the “dirichlet” boundary). There
> are runtime parameters that control the value of that temperature and some
> time-dependence, which are used in Simulation_adjustEvolution.
>
>
>
> If you have a specific intensity in mind, then you’d have to calculate
> what temperature that would be (e.g., I ~ T^4 for a blackbody).
>
>
>
> --
>
> Eddie Hansen
>
> Applications Group Leader
>
> Flash Center for Computational Science
>
>
>
>
>
> *From: *flash-users <flash-users-bounces at flash.rochester.edu> on behalf
> of Youssef Abouhussien <abouhussieny at vcu.edu>
> *Date: *Saturday, January 4, 2025 at 4:31 PM
> *To: *flash-users at flash.rochester.edu <flash-users at flash.rochester.edu>
> *Subject: *[FLASH-USERS] question about radslab
>
> Hi flash users,
>
>
>
> In RadSlab example for X-rays ablation, how can you specify the intensity?
> usually for blackbody source it's specified by the radiation temperature
> (cant change that for radiation transport purposes) and distance from
> target (for a point source) .
>
>
>
> Also i cant tell where the location of the source or shape (planar, point
> etc ) .
>
>
>
> thanks.
>
>
>
> Regards,
>
> Youssef
>
>
>
>
>
>
> *------------------------------------------------------------------------------------------------------*
>
> *Youssef Abouhussien*
>
> *Research Assistant*
>
> *Doctoral Student*
>
> Virginia Commonwealth University
>
> Dept. of Mechanical and Nuclear Engineering
>
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