[cig-commits] r16848 - short/3D/PyLith/trunk

[willic3 at geodynamics.org]

Author: willic3
Date: 2010-05-31 18:19:16 -0700 (Mon, 31 May 2010)
New Revision: 16848

Modified:
   short/3D/PyLith/trunk/README
Log:
Added description of changes to power-law.



Modified: short/3D/PyLith/trunk/README
===================================================================
--- short/3D/PyLith/trunk/README	2010-06-01 01:11:19 UTC (rev 16847)
+++ short/3D/PyLith/trunk/README	2010-06-01 01:19:16 UTC (rev 16848)
@@ -79,9 +79,14 @@
 use_nodeset_names to False to continue to use nodeset id values for
 boundary condition labels.
 
-(2) The power-law constitutive parameters have been changed in order
-to facilitate nondimensionalization. [CHARLES ADD SOME FURTHER
-EXPLANATION]
+(2) The power-law constitutive parameters have been changed so that the
+parameter units are no longer dependent on the power-law exponent. This
+is a more logical implementation and allows (among other things) users to
+vary power-law parameters using a spatial database. Previously, it was not
+possible to vary power-law parameters unless everything used the same
+power-law exponent. The new implementation uses reference-strain-rate,
+reference-stress, and power-law-exponent to describe the material. This is
+described in the 'Material Models' section of the manual.
 
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