[cig-commits] [commit] master: Clarify text (7fb6100)

[cig_noreply at geodynamics.org]

Repository : https://github.com/geodynamics/aspect

On branch  : master
Link       : https://github.com/geodynamics/aspect/compare/ed4caebc0ab942d8c7bc1a6a3ba70e37f93accde...dbe66e1b6d25d5ff21653c48f14f343e10ae69f4

>---------------------------------------------------------------

commit 7fb6100c6ac4fdd0c56366f930ee893ed49a4c58
Author: ian-r-rose <ian.r.rose at gmail.com>
Date:   Mon May 19 16:46:21 2014 -0500

    Clarify text


>---------------------------------------------------------------

7fb6100c6ac4fdd0c56366f930ee893ed49a4c58
 source/material_model/multicomponent.cc | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/source/material_model/multicomponent.cc b/source/material_model/multicomponent.cc
index 97013cf..565cef2 100644
--- a/source/material_model/multicomponent.cc
+++ b/source/material_model/multicomponent.cc
@@ -458,12 +458,14 @@ namespace aspect
   {
     ASPECT_REGISTER_MATERIAL_MODEL(Multicomponent,
                                    "multicomponent",
-                                   "This model is for use with an arbitrary number of compositional"
-                                   "fields, where each field may have completely different material"
-                                   "parameters.  Within each field, however, the material behaviour is very simple,"
-                                   "with constant material coefficients.  When more than one field is present, the"
-                                   "material properties are averaged arithmetically.  An exception is the viscosity,"
-                                   "where the averaging should make more of a difference.  For this, the user selects"
-                                   "between arithmetic, harmonic, geometric, or maximum composition averaging.")
+                                   "This model is for use with an arbitrary number of compositional fields, where each field"
+                                   " represents a rock type which can have completely different properties from the others."
+                                   " However, each rock type itself has constant material properties.  The value of the "
+                                   " compositional field is interpreed as a volume fraction. If the sum of the fields is"
+                                   " greater than one, they are renormalized.  If it is less than one, material properties "
+                                   " for ``background mantle'' make up the rest. When more than one field is present, the"
+                                   " material properties are averaged arithmetically.  An exception is the viscosity,"
+                                   " where the averaging should make more of a difference.  For this, the user selects"
+                                   " between arithmetic, harmonic, geometric, or maximum composition averaging.")
   }
 }