Changeset 2195 for branches/DEV_r1826_DOC/DOC/TexFiles/Chapters/Chap_DYN.tex

Timestamp:

2010-10-09T17:55:02+02:00 (14 years ago)

Author:

gm

Message:

ticket:#658 update TRA DYN & SBC with sbc, qsr, nxt and rnf considerations

File:

• branches/DEV_r1826_DOC/DOC/TexFiles/Chapters/Chap_DYN.tex (modified) (2 diffs)

branches/DEV_r1826_DOC/DOC/TexFiles/Chapters/Chap_DYN.tex

@@ -1131 +1131 @@
 The general framework for dynamics time stepping is a leap-frog scheme, 
 $i.e.$ a three level centred time scheme associated with an Asselin time filter 
-(cf. \S\ref{DOM_nxt}). The scheme is applied to the velocity except when using 
+(cf. Chap.\ref{STP}). The scheme is applied to the velocity except when using 
 the flux form of momentum advection (cf. \S\ref{DYN_adv_cor_flux}) in variable 
 volume level case (\key{vvl} defined), where it has to be applied to the thickness 
@@ -1154 +1154 @@
 where RHS is the right hand side of the momentum equation, the subscript $f$ 
 denotes filtered values and $\gamma$ is the Asselin coefficient. $\gamma$ is 
-initialized as \np{nn\_atfp} (namelist parameter). Its default value is \np{nn\_atfp} = 0.1.
+initialized as \np{nn\_atfp} (namelist parameter). Its default value is \np{nn\_atfp} = $10^{-3}$.
+In both cases, the modified Asselin filter is not applied since a perfect conservation 
+is not an issue for momentum equation.
 
 Note that with the filtered free surface, the update of the \textit{next} velocities