General testing

2026-05-05 10:32:30 +02:00
parent ff4c4aef23
commit d963032e74
11 changed files with 794 additions and 448 deletions
--- a/Core/NozzleFlow.cs
+++ b/Core/NozzleFlow.cs
@@ -0,0 +1,46 @@
+using System;
+using FluidSim.Components;
+
+namespace FluidSim.Core
+{
+    public static class NozzleFlow
+    {
+        public static void Compute(Volume0D vol, double area, double downstreamPressure,
+                                   out double massFlow, out double rhoFace, out double uFace, out double pFace,
+                                   double gamma = 1.4)
+        {
+            // Default fallback (no flow)
+            massFlow = 0.0;
+            rhoFace = 0.0;
+            uFace = 0.0;
+            pFace = 0.0;
+
+            if (vol == null || vol.Mass <= 0 || vol.Volume <= 0)
+                return;
+
+            double p0 = vol.Pressure;
+            double T0 = vol.Temperature;
+            double R = vol.GasConstant;
+            double rho0 = vol.Density;
+
+            if (double.IsNaN(p0) || double.IsNaN(T0) || double.IsNaN(rho0) ||
+                p0 <= 0 || T0 <= 0 || rho0 <= 0)
+                return;
+
+            double pr = downstreamPressure / p0;
+            double choked = Math.Pow(2.0 / (gamma + 1.0), gamma / (gamma - 1.0));
+            if (pr < choked) pr = choked;
+
+            double M = Math.Sqrt((2.0 / (gamma - 1.0)) * (Math.Pow(pr, -(gamma - 1.0) / gamma) - 1.0));
+            if (double.IsNaN(M)) return;
+
+            uFace = M * Math.Sqrt(gamma * R * T0);
+            rhoFace = rho0 * Math.Pow(pr, 1.0 / gamma);
+            pFace = p0 * pr;
+
+            massFlow = rhoFace * uFace * area;
+            if (double.IsNaN(massFlow) || double.IsInfinity(massFlow))
+                massFlow = 0.0;
+        }
+    }
+}