Added pipe friction

Core/Simulation.cs

@@ -15,17 +15,18 @@ namespace FluidSim.Core
         private static float sample;
         private static double ambientPressure = 1.0 * Units.atm;
 
+        private static bool enableLogging = false;
+
         public static void Initialize(int sampleRate)
         {
             dt = 1.0 / sampleRate;
 
-            double length = 0.2;
-            double radius = 5 * Units.mm;
+            double length = 2;
+            double radius = 20 * Units.mm;
             double area = Units.AreaFromDiameter(radius);
 
             pipe = new Pipe1D(length, area, sampleRate, forcedCellCount: 80);
             pipe.SetUniformState(1.225, 0.0, ambientPressure);
-            pipe.FrictionFactor = 0.0;
 
             solver = new Solver();
             solver.SetTimeStep(dt);
@@ -56,6 +57,7 @@ namespace FluidSim.Core
 
         public static void Log()
         {
+            if (!enableLogging) return;
             if (stepCount % 10 == 0 && stepCount < 1000)
             {
                 double pMid = pipe.GetPressureAtFraction(0.5);