Changes between Version 13 and Version 14 of PhysicsDataExplained


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Timestamp:
06/06/11 13:35:03 (14 years ago)
Author:
Brandon Shroyer
Comment:

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  • PhysicsDataExplained

    v13 v14  
    1 Back to [wiki:BearclawOutline]
    2 [[BR]]
     1[[PageOutline]]
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    4 = The physics.data file =
     3= {{{physics.data}}} Explained =
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    6 (The layout of physics.data changed a fair amount in revision r439, but content change was not as extensive.)
     5The {{{physics.data}}} file contains the physics parameters used by AstroBEAR.  In addition to common physical constants like [[latex($\gamma$)]], {{{physics.data}}} also contains the scaling coefficients for AstroBEAR's data.
     6
     7This contains only one namelist: {{{PhysicsData}}}.
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    89[[BR]]
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    10 === Globals ===
    11 
    12  * '''''{{{gamma:}}}'''''  The general constant ideal gas value of gamma.
     11 * '''''{{{gamma:}}}'''''  The constant ideal gas value of [[latex($\gamma$)]].  AstroBEAR generally assumes that the gases within the problem domain are monatomic, so [[latex($\gamma$)]] should be {{{1.6667}}} for non-isothermal problems.  For isothermal problems we use {{{1.001}}}.  Normally [[latex($\gamma_{isothermal} = 1$)]], but a [[latex($\gamma$)]] of exactly 1 is hard for our solvers to process, so we just get as close to 1 as we can.
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    1413 * '''''{{{gammac:}}}'''''  Used if iEOS = 1.  Can be a different real gas gamma value.