From e980cd5a60666a452486138f21efb3847def0094 Mon Sep 17 00:00:00 2001
From: Henry <Henry>
Date: Wed, 25 Feb 2015 16:54:05 +0000
Subject: [PATCH] CrankNicolsonDdtScheme: Clarified the relationship between
 the off-centre coefficient and the coefficient for the implicit part

---
 .../CrankNicolsonDdtScheme/CrankNicolsonDdtScheme.H        | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/finiteVolume/finiteVolume/ddtSchemes/CrankNicolsonDdtScheme/CrankNicolsonDdtScheme.H b/src/finiteVolume/finiteVolume/ddtSchemes/CrankNicolsonDdtScheme/CrankNicolsonDdtScheme.H
index 5c505047b..1568890de 100644
--- a/src/finiteVolume/finiteVolume/ddtSchemes/CrankNicolsonDdtScheme/CrankNicolsonDdtScheme.H
+++ b/src/finiteVolume/finiteVolume/ddtSchemes/CrankNicolsonDdtScheme/CrankNicolsonDdtScheme.H
@@ -56,6 +56,13 @@ Description
     interFoam family of solvers.  Boundedness cannot be guaranteed with the
     backward scheme.
 
+Note
+    The Crank-Nicolson coefficient for the implicit part of the RHS is related
+    to the off-centering coefficient by
+    \verbatim
+        cnCoeff = 1.0/(1.0 + ocCoeff);
+    \endverbatim
+
 See Also
     Foam::Euler
     Foam::backward