Engine working

Components/Atmosphere.cs

@@ -37,7 +37,7 @@ namespace FluidSim.Components
             Port.Density = Density;
             Port.Temperature = Temperature;
             Port.SpecificEnthalpy = SpecificEnthalpy;
-            // MassFlowRate is set by the solver connector
+            Port.AirFraction = 1.0;
         }
     }
 }