refactoring (broken right now)

Interfaces/Port.cs

@@ -1,18 +1,28 @@
 namespace FluidSim.Interfaces
 {
+    /// <summary>
+    /// A fluid port that belongs to a component. The solver writes mass flow,
+    /// enthalpy, etc. here, and reads pressure, density, etc.
+    /// </summary>
     public class Port
     {
+        // Set by the solver during coupling resolution
+        public double MassFlowRate;         // kg/s, positive INTO the component that owns this port
+        public double SpecificEnthalpy;     // J/kg, enthalpy of the fluid crossing the port (inflow direction)
+
+        // Set by the owning component after integration to reflect its current state
         public double Pressure;             // Pa
-        public double MassFlowRate;         // kg/s, positive INTO the component
-        public double SpecificEnthalpy;     // J/kg, enthalpy of fluid entering this port
         public double Density;              // kg/m³
         public double Temperature;          // K
 
+        // Link back to owner (optional, but handy for debugging)
+        public object? Owner { get; set; }
+
         public Port()
         {
-            Pressure = 101325.0;
             MassFlowRate = 0.0;
             SpecificEnthalpy = 0.0;
+            Pressure = 101325.0;
             Density = 1.225;
             Temperature = 300.0;
         }