Changeset 5955 for anuga_core/documentation/user_manual/anuga_user_manual.tex

Timestamp:

Nov 13, 2008, 1:56:16 PM (16 years ago)

Author:

ole

Message:

Added notes about transmissive boundary conditions

File:

• anuga_core/documentation/user_manual/anuga_user_manual.tex (modified) (3 diffs)

anuga_core/documentation/user_manual/anuga_user_manual.tex

@@ -2235 +2235 @@
 %%%
 \begin{classdesc}{Transmissive\_boundary}{domain = None}
+\label{pg: transmissive boundary}
 Module: \module{abstract\_2d\_finite\_volumes.generic\_boundary\_conditions}
 
@@ -2303 +2304 @@
 \begin{classdesc}{Transmissive\_Momentum\_Set\_Stage\_boundary}{Boundary}
 Module: \module{shallow\_water}
+\label{pg: transmissive momentum set stage boundary}
 
 This boundary returns same momentum conserved quantities as
@@ -2313 +2315 @@
 This class is specific to the shallow water equation as it works with the
 momentum quantities assumed to be the second and third conserved quantities.
+
+In some circumstances, this boundary condition may cause numerical instabilities for similar reasons as what has been observed with the simple fully transmissive boundary condition (see Page \pageref{pg: transmissive boundary}). 
+This could for example be the case if a planar wave is reflected out through this boundary.
 \end{classdesc}