116 lines
4.4 KiB
C#
116 lines
4.4 KiB
C#
using System.Collections.Generic;
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using FluidSim.Components;
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using FluidSim.Interfaces;
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namespace FluidSim.Core
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{
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public class Solver
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{
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private readonly List<Volume0D> _volumes = new();
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private readonly List<Pipe1D> _pipes = new();
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private readonly List<Connection> _connections = new();
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public void AddVolume(Volume0D v) => _volumes.Add(v);
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public void AddPipe(Pipe1D p) => _pipes.Add(p);
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public void AddConnection(Connection c) => _connections.Add(c);
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public void Step()
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{
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// 1. Volumes publish state
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foreach (var v in _volumes)
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v.PushStateToPort();
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// 2. Compute boundary fluxes (orifice model)
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foreach (var conn in _connections)
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{
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if (IsPipePort(conn.PortA) && IsVolumePort(conn.PortB))
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ApplyOrifice(conn, conn.PortA, conn.PortB);
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else if (IsVolumePort(conn.PortA) && IsPipePort(conn.PortB))
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ApplyOrifice(conn, conn.PortB, conn.PortA);
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else if (IsVolumePort(conn.PortA) && IsVolumePort(conn.PortB))
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VolumeToVolume(conn);
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}
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// 3. Pipe simulation step
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foreach (var p in _pipes)
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p.Simulate();
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// 4. Transfer pipe‑port data to volumes
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foreach (var conn in _connections)
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{
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if (IsPipePort(conn.PortA) && IsVolumePort(conn.PortB))
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TransferPipeToVolume(conn.PortA, conn.PortB);
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else if (IsVolumePort(conn.PortA) && IsPipePort(conn.PortB))
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TransferPipeToVolume(conn.PortB, conn.PortA);
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}
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// 5. Integrate volumes
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foreach (var v in _volumes)
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v.Integrate();
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}
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bool IsVolumePort(Port p) => _volumes.Exists(v => v.Port == p);
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bool IsPipePort(Port p) => _pipes.Exists(pp => pp.PortA == p || pp.PortB == p);
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Pipe1D GetPipe(Port p) => _pipes.Find(pp => pp.PortA == p || pp.PortB == p);
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void ApplyOrifice(Connection conn, Port pipePort, Port volPort)
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{
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Pipe1D pipe = GetPipe(pipePort);
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if (pipe == null) return;
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bool isLeft = pipe.PortA == pipePort;
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double pP = isLeft ? pipe.GetLeftPressure() : pipe.GetRightPressure();
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double rhoP = isLeft ? pipe.GetLeftDensity() : pipe.GetRightDensity();
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double uP = isLeft ? pipe.GetCellVelocity(0)
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: pipe.GetCellVelocity(pipe.GetCellCount() - 1);
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double pV = volPort.Pressure;
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double rhoV = volPort.Density;
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double uV = 0.0; // volume has zero organized velocity
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OrificeBoundary.PipeVolumeFlux(
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pP, rhoP, uP,
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pV, rhoV, uV,
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conn, pipe.Area, isLeft,
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out double massFlux, out double momFlux, out double energyFlux);
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if (isLeft)
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pipe.SetLeftBoundaryFlux(massFlux, momFlux, energyFlux);
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else
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pipe.SetRightBoundaryFlux(massFlux, momFlux, energyFlux);
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}
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void VolumeToVolume(Connection conn)
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{
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double mdot = OrificeBoundary.MassFlow(
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conn.PortA.Pressure, conn.PortA.Density,
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conn.PortB.Pressure, conn.PortB.Density, conn);
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conn.PortA.MassFlowRate = -mdot;
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conn.PortB.MassFlowRate = mdot;
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if (mdot > 0)
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conn.PortB.SpecificEnthalpy = conn.PortA.SpecificEnthalpy;
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else if (mdot < 0)
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conn.PortA.SpecificEnthalpy = conn.PortB.SpecificEnthalpy;
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}
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void TransferPipeToVolume(Port pipePort, Port volPort)
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{
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double mdot = pipePort.MassFlowRate;
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// mdot > 0 → fluid enters pipe from volume
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// mdot < 0 → fluid leaves pipe and enters volume
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// Volume mass flow sign is opposite (positive into volume)
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volPort.MassFlowRate = -mdot;
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if (mdot < 0) // pipe → volume
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{
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// ★ pipePort.SpecificEnthalpy now contains TOTAL enthalpy
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volPort.SpecificEnthalpy = pipePort.SpecificEnthalpy;
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}
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// else: fluid goes volume → pipe → volume owns its own (static) enthalpy,
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// which is already correct.
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}
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}
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} |