Add project files.

2026-05-02 16:58:40 +02:00
parent edc3fd9b48
commit 9fc45224af
17 changed files with 915 additions and 0 deletions
--- a/Core/Simulation.cs
+++ b/Core/Simulation.cs
@@ -0,0 +1,86 @@
+using System;
+using FluidSim.Components;
+using FluidSim.Utils;
+
+namespace FluidSim.Core
+{
+    public static class Simulation
+    {
+        private static Pipe1D pipe;
+        private static Connection leftConn, rightConn;   // dummy connections for orifice params
+        private static double time;
+        private static double dt;
+        private static int stepCount;
+
+        public static void Initialize(int sampleRate)
+        {
+            dt = 1.0 / sampleRate;
+
+            double length = 150 * Units.mm;
+            double diameter = 25 * Units.mm;
+            double area = Units.AreaFromDiameter(25, Units.mm);
+            int nCells = 10;
+
+            pipe = new Pipe1D(length, area, nCells, sampleRate);
+            pipe.SetUniformState(1.2, 0.0, 1.0 * Units.atm);   // start at 1 atm
+            pipe.FrictionFactor = 0.02;
+
+            // Dummy connections – only used for orifice parameters
+            leftConn = new Connection(null, null) { Area = area, DischargeCoefficient = 1.0, Gamma = 1.4 };
+            rightConn = new Connection(null, null) { Area = area, DischargeCoefficient = 1.0, Gamma = 1.4 };
+        }
+
+        public static float Process()
+        {
+            // Fixed boundary reservoirs
+            double pLeft = 1.1 * Units.atm;
+            double rhoLeft = 1.2;
+            double uLeft = 0.0;
+
+            double pRight = 1.0 * Units.atm;
+            double rhoRight = 1.2;
+            double uRight = 0.0;
+
+            // Compute boundary fluxes via orifice model
+            OrificeBoundary.PipeVolumeFlux(
+                pipe.GetLeftPressure(), pipe.GetLeftDensity(), 0.0,
+                pLeft, rhoLeft, uLeft,
+                leftConn, pipe.Area, true,
+                out double leftMassFlux, out double leftMomFlux, out double leftEnergyFlux);
+
+            OrificeBoundary.PipeVolumeFlux(
+                pipe.GetRightPressure(), pipe.GetRightDensity(), 0.0,
+                pRight, rhoRight, uRight,
+                rightConn, pipe.Area, false,
+                out double rightMassFlux, out double rightMomFlux, out double rightEnergyFlux);
+
+            pipe.SetLeftBoundaryFlux(leftMassFlux, leftMomFlux, leftEnergyFlux);
+            pipe.SetRightBoundaryFlux(rightMassFlux, rightMomFlux, rightEnergyFlux);
+            pipe.Simulate();
+
+            time += dt;
+            stepCount++;
+            Log();
+            return 0f;
+        }
+
+        public static void Log()
+        {
+            if (stepCount <= 20 || stepCount % 50 == 0)
+            {
+                Console.WriteLine($"Step {stepCount:D4}  t = {time * 1e3:F3} ms");
+                for (int i = 0; i < pipe.GetCellCount(); i++)
+                {
+                    double rho = pipe.GetCellDensity(i);
+                    double p = pipe.GetCellPressure(i);
+                    double u = pipe.GetCellVelocity(i);
+                    Console.WriteLine($"  Cell {i}: ρ={rho:F4} kg/m³  p={p / 1e5:F6} bar  u={u:F3} m/s");
+                }
+                double leftFlow = pipe.PortA.MassFlowRate;
+                double rightFlow = pipe.PortB.MassFlowRate;
+                Console.WriteLine($"  Left flow = {leftFlow * 1e3:F4} g/s   Right flow = {rightFlow * 1e3:F4} g/s");
+                Console.WriteLine();
+            }
+        }
+    }
+}