BEGIN:VCALENDAR X-WR-TIMEZONE:America/Chicago PRODID:-//University of Iowa//Events 1.0//EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT DTSTAMP:20240329T073739Z DTSTART:20191202T153000 DTEND:20191202T163000 SUMMARY:Physics & Astronomy Colloquium DESCRIPTION:Professor James Rossmanith\; Department of Mathematics\; Iowa State University\n\n"An Overview of the Moment-Closure Problem for Kinetic Boltzmann Equations"\n\nAbstract: In many applications\, the dynamics of gas and plasma can be accurately modeled using kinetic Boltzmann equations. These equations are integro-differential systems posed in a high-dimensional phase space\, which is typically comprised of the spatial coordinates and the velocity coordinates. If the system is sufficiently collisional the kinetic equations may be replaced by a fluid approximation that is posed in physical space (i.e.\, a lower dimensional space than the full phase space). The precise form of the fluid approximation depends on the choice of the moment-closure. In general\, finding a suitable robust moment-closure is still an open scientific problem. In this talk I will give an overview of the moment-closure problem and describe various attempts at finding suitable closures the current generation of gamma-ray observatories.\n\n\nhttps://events.uiowa.edu/32733 LOCATION:Van Allen Hall\, 301\, 30 North Dubuque Street\, North Liberty\, IA 52317 UID:edu.uiowa.events-prod-32733 X-ALT-DESC;FMTTYPE=text/html:
Professor James Rossmanith\; Department of Mathematics\; Iowa State University
\n\n"An Overview of the Moment-Closure Problem for Kinetic Boltzmann Equations"
\n\nAbstract: In many applications\, the dynamics of gas and plasma can be accurately modeled using kinetic Boltzmann equations. These equations are integro-differential systems posed in a high-dimensional phase space\, which is typically comprised of the spatial coordinates and the velocity coordinates. If the system is sufficiently collisional the kinetic equations may be replaced by a fluid approximation that is posed in physical space (i.e.\, a lower dimensional space than the full phase space). The precise form of the fluid approximation depends on the choice of the moment-closure. In general\, finding a suitable robust moment-closure is still an open scientific problem. In this talk I will give an overview of the moment-closure problem and describe various attempts at finding suitable closures the current generation of gamma-ray observatories.
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