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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m trying to solve a problem in FLASH related to active particles. The problem is that particles are created dynamically over the simulation run, depending on fluid properties, with some initial velocity. As these particles move through the plasma, they lose energy at some rate that depends again on the fluid properties, and eventually get deleted once they run out of energy. The energy lost during the motion of the particle should be deposited back into the plasma.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m trying to figure out if I can use some of the existing modules for my problem. It seems like I can handle particle creation using Particles_addNew, and delete particles by setting TAG_PART_PROP to a negative number and calling Particles_clean. What I’m not so sure about is how to handle the energy deposition. Would it make sense to use the same approach as in the EnergyDeposition module (i.e. in ed_updatePlasma and ed_TraceRays)? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Varchas Gopalaswamy<o:p></o:p></p><p class=MsoNormal>PhD Candidate, Laboratory for Laser Energetics, <o:p></o:p></p><p class=MsoNormal>Department of Mechanical Engineering<o:p></o:p></p><p class=MsoNormal>University of Rochester<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>