[Yt-svn] commit/yt: brittonsmith: Fixed entropy field.

[Bitbucket]

1 new changeset in yt:

http://bitbucket.org/yt_analysis/yt/changeset/f34826a711b9/
changeset:   r3784:f34826a711b9
branch:      yt
user:        brittonsmith
date:        2011-03-04 00:42:25
summary:     Fixed entropy field.
affected #:  1 file (11 bytes)

--- a/yt/data_objects/universal_fields.py	Thu Mar 03 18:23:35 2011 -0500
+++ b/yt/data_objects/universal_fields.py	Thu Mar 03 18:42:25 2011 -0500
@@ -289,9 +289,9 @@
 add_field("Pressure", function=_Pressure, units=r"\rm{dyne}/\rm{cm}^{2}")
 
 def _Entropy(field, data):
-    return (kboltz/mh) * data["Temperature"] / \
-           (data["MeanMolecularWeight"] * data["Density"]**(2./3.))
-add_field("Entropy", units=r"\rm{ergs}\/\rm{cm}^{2}",
+    return kboltz  * data["Temperature"] / \
+           (data["NumberDensity"]**(data.pf["Gamma"] - 1.0))
+add_field("Entropy", units=r"\rm{ergs}\ \rm{cm}^{2}",
           function=_Entropy)
 
 def _Height(field, data):

Repository URL: https://bitbucket.org/yt_analysis/yt/

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