Helmholtz testing (no decay bug)

Components/Atmosphere.cs

@@ -2,18 +2,15 @@ using FluidSim.Interfaces;
 
 namespace FluidSim.Components
 {
-    /// <summary>
-    /// Represents the ambient atmosphere – constant pressure/temperature reservoir.
-    /// </summary>
     public class Atmosphere : IComponent
     {
-        public double Pressure { get; set; } = 101325.0;
-        public double Temperature { get; set; } = 300.0;
-        public double GasConstant { get; set; } = 287.0;
-        public double Gamma => 1.4;
+        public float Pressure { get; set; } = 101325f;
+        public float Temperature { get; set; } = 300f;
+        public float GasConstant { get; set; } = 287f;
+        public float Gamma => 1.4f;
 
-        public double Density => Pressure / (GasConstant * Temperature);
-        public double SpecificEnthalpy => Gamma / (Gamma - 1.0) * Pressure / Density;
+        public float Density => Pressure / (GasConstant * Temperature);
+        public float SpecificEnthalpy => Gamma / (Gamma - 1f) * Pressure / Density;
 
         public Port Port { get; }
 
@@ -25,9 +22,8 @@ namespace FluidSim.Components
 
         public IReadOnlyList<Port> Ports => new[] { Port };
 
-        public void UpdateState(double dt)
+        public void UpdateState(float dt)
         {
-            // Atmosphere is static – just ensure the port reflects current values
             UpdatePort();
         }
 
@@ -37,7 +33,7 @@ namespace FluidSim.Components
             Port.Density = Density;
             Port.Temperature = Temperature;
             Port.SpecificEnthalpy = SpecificEnthalpy;
-            Port.AirFraction = 1.0;
+            Port.AirFraction = 1f;
         }
     }
 }