Helmholtz testing (no decay bug)

Interfaces/IComponent.cs

@@ -2,18 +2,9 @@ using System.Collections.Generic;
 
 namespace FluidSim.Interfaces
 {
-    /// <summary>
-    /// Minimal interface for all simulation components that have ports.
-    /// </summary>
     public interface IComponent
     {
-        /// <summary>All ports exposed by this component.</summary>
         IReadOnlyList<Port> Ports { get; }
-
-        /// <summary>
-        /// Called once per global time step to update the component's internal state
-        /// using the port flow data accumulated during sub‑steps.
-        /// </summary>
-        void UpdateState(double dt);
+        void UpdateState(float dt);
     }
 }

Interfaces/Port.cs

@@ -2,23 +2,23 @@
 {
     public class Port
     {
-        public double MassFlowRate;         // kg/s, positive INTO the component that owns this port
-        public double SpecificEnthalpy;     // J/kg
-        public double Pressure;             // Pa
-        public double Density;              // kg/m³
-        public double Temperature;          // K
-        public double AirFraction;          // mass fraction of air (0 = exhaust, 1 = air)
+        public float MassFlowRate;          // kg/s, positive INTO owning component
+        public float SpecificEnthalpy;      // J/kg
+        public float Pressure;              // Pa
+        public float Density;               // kg/m³
+        public float Temperature;           // K
+        public float AirFraction;           // mass fraction (0 = exhaust, 1 = air)
 
         public object? Owner { get; set; }
 
         public Port()
         {
-            MassFlowRate = 0.0;
-            SpecificEnthalpy = 0.0;
-            Pressure = 101325.0;
-            Density = 1.225;
-            Temperature = 300.0;
-            AirFraction = 1.0;   // default fresh air
+            MassFlowRate = 0f;
+            SpecificEnthalpy = 0f;
+            Pressure = 101325f;
+            Density = 1.225f;
+            Temperature = 300f;
+            AirFraction = 1f;
         }
     }
 }