<div dir="ltr">Hi Jon,<div><br></div><div>I would think initializing dust particles some time into the simulation would be analogous to modeling star formation.</div><div><br></div><div>We have our star particle model called by Particles_advanceModel. And one of the first lines of the star particle model subroutine handles star particle formation.</div><div><br></div><div>So the traceback is:</div><div><br></div><div>Driver_evolveFlash</div><div> -> Particles _advance</div><div> -> -> Particles_advanceModel</div><div> -> -> -> Particles_advanceStarParticleModel</div><div> -> -> -> -> stars_createStars</div><div><br></div><div>Hope that helps.</div><div><br></div><div>Best,<br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr">--------<div>Ryan</div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 2, 2021 at 5:49 AM Slavin, Jonathan <<a href="mailto:jslavin@cfa.harvard.edu">jslavin@cfa.harvard.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Hi all,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">I'm trying to figure out if there's some way that I can delay particle initiation. Essentially I'm trying to set up the simulation with pre-evolution of the environment but I'm only really interested in the evolution after a certain time. I'm calculating the evolution of dust particles (I've created a dust unit that evolves the position, velocity, and mass of the particles) so I don't want them to evolve prior to the main simulation. </div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">It seems that particle initiation occurs at the start of the simulation via calls from Driver_initFlash. I wrote my own pt_initPositions and it works fine to initialize the particles at the beginning of the simulation. I just don't know how to delay that initialization - though I have some ideas for kludgy workarounds. I'd appreciate hearing ideas for the proper way to do this.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Thanks,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Jon</div><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><img src="https://lh6.googleusercontent.com/mJuf9zI6QC5w6HPVCinnLSkpp-RgufOfl7nw1E_aghDflNhusoRbZTuP_0x-RkECQRhIfvPxGMe6zSt6chyXZ7D5DdqtkZPp0q-TE8itKny8VWObWAiZ1aurYWDO0CtZgvJEXfzu" width="350" height="2" style="font-size: 12.6667px; font-family: Arial; white-space: pre-wrap; border: none;"></div><div dir="ltr">Jonathan D. Slavin</div><div dir="ltr">Astrophysicist - High Energy Astrophysics Division</div><div dir="ltr">Center for Astrophysics | Harvard & Smithsonian</div><div dir="ltr">Office: (617) 496-7981 | Cell: (781) 363-0035<br>60 Garden Street | MS 83 | Cambridge, MA 02138</div></div><div dir="ltr"><span><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><img src="https://lh6.googleusercontent.com/mJuf9zI6QC5w6HPVCinnLSkpp-RgufOfl7nw1E_aghDflNhusoRbZTuP_0x-RkECQRhIfvPxGMe6zSt6chyXZ7D5DdqtkZPp0q-TE8itKny8VWObWAiZ1aurYWDO0CtZgvJEXfzu" width="350" height="2" style="border: none;"></span><span style="font-size:9.5pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><br></span></p></span></div></div></div></div></div></div></div></div>
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