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<p class="MsoNormal"><span style="font-size:11.0pt">I’m not sure exactly what you’re trying to accomplish. Multi-group radiation transport is not independent of absorption or emission. Transport, absorption, and emission are all solved simultaneously per radiation
energy group. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Changing urad_tot in that routine won’t actually do anything since that variable is not actually passed out of the subroutine. The important one is urad() which is the radiation energy density per group. If
you want to change the relationship between energy density U and T, then that’s more complicated…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">You would make changes in RadTrans_mgdUFromT to make the Dirichlet BC work the way you want it to, but you would also have to make corresponding changes in RadTrans.F90 to make the emission term consistent.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">--</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#181A1B">Eddie Hansen</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#181A1B">Applications Group Leader<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#181A1B">Flash Center for Computational Science</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Youssef Abouhussien <abouhussieny@vcu.edu><br>
<b>Date: </b>Wednesday, January 8, 2025 at 7:10 PM<br>
<b>To: </b>Hansen, Eddie <ehansen@pas.rochester.edu><br>
<b>Cc: </b>flash-users@flash.rochester.edu <flash-users@flash.rochester.edu><br>
<b>Subject: </b>[EXT] Re: [FLASH-USERS] question about radslab<o:p></o:p></span></p>
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<p class="MsoNormal">Hi Eddie,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">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 "<span style="color:red">urad_tot = urad_tot + urad(g)"</span> from
<span style="color:blue">RadTrans_mgdUFromT.90</span> file and multiplied it by a constant to decrease the energy deposited to match the intensity i have in mind; would that work? Thanks.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards,<o:p></o:p></p>
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<p class="MsoNormal">Youssef<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><i>------------------------------------------------------------------------------------------------------</i><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="color:#999999;background:white">Youssef Abouhussien</span></b><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="color:#999999;background:white">Research Assistant</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="color:#999999;background:white">Doctoral Student</span></i><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#999999;background:white">Virginia Commonwealth University</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#999999;background:white">Dept. of Mechanical and Nuclear Engineering</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Jan 8, 2025 at 6:58<span style="font-family:"Arial",sans-serif"> </span>PM Hansen, Eddie <<a href="mailto:ehansen@pas.rochester.edu">ehansen@pas.rochester.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Hi Youssef,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">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.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">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).</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">--</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif;color:#181A1B">Eddie Hansen</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif;color:#181A1B">Applications Group Leader</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif;color:#181A1B">Flash Center for Computational Science</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">flash-users <<a href="mailto:flash-users-bounces@flash.rochester.edu" target="_blank">flash-users-bounces@flash.rochester.edu</a>> on behalf of Youssef Abouhussien <<a href="mailto:abouhussieny@vcu.edu" target="_blank">abouhussieny@vcu.edu</a>><br>
<b>Date: </b>Saturday, January 4, 2025 at 4:31 PM<br>
<b>To: </b><a href="mailto:flash-users@flash.rochester.edu" target="_blank">flash-users@flash.rochester.edu</a> <<a href="mailto:flash-users@flash.rochester.edu" target="_blank">flash-users@flash.rochester.edu</a>><br>
<b>Subject: </b>[FLASH-USERS] question about radslab</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi flash users,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">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) .<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Also i cant tell where the location of the source or shape (planar, point etc ) .<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">thanks.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Regards,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Youssef<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="color:#999999;background:white">Youssef Abouhussien</span></b><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span style="color:#999999;background:white">Research Assistant</span></i><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span style="color:#999999;background:white">Doctoral Student</span></i><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#999999;background:white">Virginia Commonwealth University</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#999999;background:white">Dept. of Mechanical and Nuclear Engineering</span><o:p></o:p></p>
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