From 7a823de58037c10e83fba22842a1fcc599403ae7 Mon Sep 17 00:00:00 2001
From: Hrvoje Jasak <h.jasak@wikki.co.uk>
Date: Fri, 27 May 2011 20:53:20 +0100
Subject: [PATCH] File moved

---
 .../general/include/checkVolContinuity.H      | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/finiteVolume/cfdTools/general/include/checkVolContinuity.H

diff --git a/src/finiteVolume/cfdTools/general/include/checkVolContinuity.H b/src/finiteVolume/cfdTools/general/include/checkVolContinuity.H
new file mode 100644
index 000000000..8cf0882fe
--- /dev/null
+++ b/src/finiteVolume/cfdTools/general/include/checkVolContinuity.H
@@ -0,0 +1,52 @@
+if (mesh.moving())
+{
+    // The ddt term constructed by hand because it must be Euler
+    const scalar dt = runTime.deltaT().value();
+
+    const scalarField& V = mesh.V().field();
+    const scalarField& V0 = mesh.V0().field();
+    scalar sumV = gSum(V);
+    scalar sumV0 = gSum(V0);
+
+    scalarField volChange = (1.0 - V0/V)/dt;
+
+    scalarField divFlux =
+      - fvc::div(mesh.phi())().internalField();
+
+    scalarField conserve = volChange + divFlux;
+
+    scalar sumLocalContErr = dt*gSum(mag(conserve*mesh.V()))/sumV;
+    scalar globalContErr = dt*gSum(conserve*mesh.V())/sumV;
+
+    label nMotionErrors = 0;
+    scalar maxMotionError = 0;
+
+    forAll (conserve, cellI)
+    {
+        maxMotionError = Foam::max(maxMotionError, mag(conserve[cellI]));
+
+        if (mag(conserve[cellI]) > 1e-8)
+        {
+            Info<< "Motion conservation error in cell " << cellI << ": "
+                << conserve[cellI]
+                << " V: " << V[cellI] << " V0: " << V0[cellI]
+                << " volume change: " << volChange[cellI]
+                << " div flux: " << divFlux[cellI] << endl;
+
+            nMotionErrors++;
+        }
+    }
+
+    if (nMotionErrors > 0)
+    {
+        Info<< "Number of motion errors: " << nMotionErrors
+            << " out of nCells = " << mesh.nCells() << endl;
+    }
+
+    Info<< "volume continuity errors : "
+        << "volume = " << sumV
+        << ", old volume = " << sumV0
+        << ", max error = " << maxMotionError
+        << ", sum local = " << sumLocalContErr
+        << ", global = " << globalContErr << endl;
+}