simpleFoam, SRFSimpleFoam: Added momentumPredictor option

applications/solvers/incompressible/simpleFoam/SRFSimpleFoam/UrelEqn.H

@@ -14,6 +14,9 @@
 
     fvOptions.constrain(UrelEqn);
 
-    solve(UrelEqn == -fvc::grad(p));
+    if (simple.momentumPredictor())
+    {
+        solve(UrelEqn == -fvc::grad(p));
 
-    fvOptions.correct(Urel);
+        fvOptions.correct(Urel);
+    }

applications/solvers/incompressible/simpleFoam/UEqn.H

@@ -16,6 +16,9 @@
 
     fvOptions.constrain(UEqn);
 
-    solve(UEqn == -fvc::grad(p));
+    if (simple.momentumPredictor())
+    {
+        solve(UEqn == -fvc::grad(p));
 
-    fvOptions.correct(U);
+        fvOptions.correct(U);
+    }