Add the OpenFOAM source tree

applications/utilities/postProcessing/velocityField/Mach/thermodynamicMach.H

@@ -0,0 +1,50 @@
+#   include "readThermodynamicProperties.H"
+
+    for (label i=startTime; i<endTime; i++)
+    {
+        runTime.setTime(Times[i], i);
+
+        Info<< "Time = " << runTime.timeName() << endl;
+
+        IOobject Uheader
+        (
+            "U",
+            runTime.timeName(),
+            mesh,
+            IOobject::MUST_READ
+        );
+
+        IOobject Theader
+        (
+            "T",
+            runTime.timeName(),
+            mesh,
+            IOobject::MUST_READ
+        );
+
+
+        // Check U exists
+        if (Uheader.headerOk() && Theader.headerOk())
+        {
+            mesh.readUpdate();
+
+            volVectorField U(Uheader, mesh);
+            volScalarField T(Theader, mesh);
+
+            volScalarField Ma
+            (
+                IOobject
+                (
+                    "Ma",
+                    runTime.timeName(),
+                    mesh
+                ),
+                mag(U)/(sqrt(((Cv + R)/Cv)*R*T))
+            );
+            Ma.write();
+        }
+        else
+        {
+            Info<< "    No U or T" << endl;
+        }
+    }