[cig-commits] r5695 - mc/3D/CitcomS/trunk/doc/manual

[tan2 at geodynamics.org]

Author: tan2
Date: 2007-01-08 15:09:47 -0800 (Mon, 08 Jan 2007)
New Revision: 5695

Modified:
   mc/3D/CitcomS/trunk/doc/manual/citcoms.lyx
Log:
Another document fix for issue75, related to "how to specify time-invariant
velocity boundary conditions?"


Modified: mc/3D/CitcomS/trunk/doc/manual/citcoms.lyx
===================================================================
--- mc/3D/CitcomS/trunk/doc/manual/citcoms.lyx	2007-01-08 22:19:35 UTC (rev 5694)
+++ mc/3D/CitcomS/trunk/doc/manual/citcoms.lyx	2007-01-08 23:09:47 UTC (rev 5695)
@@ -8118,6 +8118,7 @@
 \end_inset
 
 .
+ Note that the velocity file is in a unit of cm/yr.
 \end_layout
 
 \begin_layout Standard
@@ -16314,6 +16315,41 @@
 \end_layout
 
 \begin_layout Standard
+In this example, the model age will start at 83 Ma and decrease toward 0
+ Ma.
+ At any particular age, the velocity boundary conditions are interpolated
+ in time according to the nearest 
+\family typewriter
+bvel.dat
+\family default
+ files.
+ Once the age becomes negative, the velocity boundary conditions are specified
+ by the content of 
+\family typewriter
+bvel.dat0.
+\end_layout
+
+\begin_layout Quote
+
+\series bold
+TIP:
+\series default
+ By setting 
+\family typewriter
+start_age=0
+\family default
+ and providing identical 
+\family typewriter
+bvel.dat0
+\family default
+ and 
+\family typewriter
+bvel.dat1
+\family default
+, you can effectively get time-invariant velocity boundary conditions.
+\end_layout
+
+\begin_layout Standard
 For the global mesh, each of the 12 caps requires one file for each million-year
  interval.
  For example, these files are needed for an 82-million-year age: