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DTSTART;TZID=America/Chicago:20181114T111500
DTEND;TZID=America/Chicago:20181114T113000
UID:submissions.supercomputing.org_SC18_sess338_svs106@linklings.com
SUMMARY:The First Water in the Universe
DESCRIPTION:Brandon Wiggins (Southern Utah University); Francesca Samsel (
 University of Texas); Kristin Hoch (Los Alamos National Laboratory); Greg 
 Abram (University of Texas, Texas Advanced Computing Center); Alex Gaglian
 o (University of Illinois); and Joseph Smidt (Los Alamos National Laborato
 ry)\n\nRecent work in the chemistry of molecular clouds in the early unive
 rse has found reactions that may create ancient water molecules that preda
 te our Sun.   For these to take place, however, particular conditions of m
 olecular density and temperature must exist.  Water molecules will be dest
 royed by either high temperatures or when densities are insufficient to sh
 ield them from UV rays.  Water molecules will only be created and persist 
 in areas of the universe in which these properties are suitable, and will 
 do so at different rates depending on local conditions.\n\nWe present a co
 mbined a high resolution hydrodynamics simulation of the early universe cl
 osely coupled with this hydroxyl and water-producing chemistry model to de
 termine how water molecules would be created and distributed in space and 
 time in the early universe.  By comparing these simulation results to astr
 onomical observations we can verify both the hydrodynamic and chemical mod
 el of ancient water formation.\n\nThis work is enabled by the computationa
 l power of today’s supercomputers and simulation technology.  The complexi
 ty of the chemistry model is significantly higher than that of simple hydr
 odynamics, making this a computationally intensive model.  Vast difference
  in scale of the physics involved, from the cosmological scale of the univ
 erse through the stellar scale of stars and novae to the molecular scale o
 f chemical reactions requires that adaptive mesh refinement (AMR) techniqu
 es be used to provide resolution that varies as demanded by the physics.  
 The visualizations presented herein will show the dynamics of the simulati
 on as it evolves over time.\n\nTag: Visualization\n\nRegistration Category
 : Tech Program Reg Pass\n\n
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