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This commit is contained in:
max
2026-05-07 21:48:37 +02:00
parent 92d84eacfe
commit b3230844b7
14 changed files with 441 additions and 486 deletions
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43
Core/OrificeLink.cs
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@@ -46,16 +46,21 @@ namespace FluidSim.Core
double volRho = VolumePort.Density;
double volT = VolumePort.Temperature;
double volH = VolumePort.SpecificEnthalpy;
double volAF = VolumePort.AirFraction;
(double pipeRho, double pipeU, double pipeP) = IsPipeLeftEnd
? Pipe.GetInteriorStateLeft()
: Pipe.GetInteriorStateRight();
double pipeT = pipeP / Math.Max(pipeRho * 287.0, 1e-12);
double pipeAF = IsPipeLeftEnd
? Pipe.GetInteriorAirFractionLeft()
: Pipe.GetInteriorAirFractionRight();
double gamma = 1.4;
double R = 287.0;
// ---- Steady‑state nozzle solution (gives correct exit state) ----
// ---- Steady‑state nozzle solution ----
double mdotSS; // positive = volume → pipe
double rhoFace0, uFace0, pFace0;
if (volP >= pipeP)
@@ -71,15 +76,6 @@ namespace FluidSim.Core
mdotSS = -mdotUpToDown;
}
// ====== Hard physical cap: max sonic flow × 1.1 ======
double upRho = mdotSS >= 0 ? volRho : pipeRho;
double upT = mdotSS >= 0 ? volT : pipeT;
double upC = Math.Sqrt(gamma * R * upT);
double maxFlow = upRho * upC * area * 1.1;
if (Math.Abs(mdotSS) > maxFlow)
mdotSS = Math.Sign(mdotSS) * maxFlow;
// ====================================================
// ---- Dynamic update ----
if (UseInertance)
{
@@ -102,21 +98,38 @@ namespace FluidSim.Core
if (_mdot > maxOut) _mdot = maxOut;
}
// ---- Ghost state ----
// ---- Ghost state with air fraction ----
double rhoFace = _mdot >= 0 ? volRho : pipeRho;
double pFace = pFace0;
double mdotMag = Math.Abs(_mdot);
double uFace = mdotMag / (rhoFace * area);
// Determine air fraction for ghost and for volume port
double airFracGhost; // air fraction of ghost cell (at pipe end)
double airFracForVolume; // if flow reverses into volume, this is the air fraction entering volume
if (_mdot >= 0) // volume → pipe
{
airFracGhost = volAF;
// Flow enters pipe; no need to set volume's air fraction (port already has its own)
airFracForVolume = volAF; // unused
}
else // pipe → volume
{
airFracGhost = pipeAF;
airFracForVolume = pipeAF;
VolumePort.AirFraction = airFracForVolume;
}
if (IsPipeLeftEnd)
uFace = _mdot >= 0 ? uFace : -uFace;
else
uFace = _mdot >= 0 ? -uFace : uFace;
if (IsPipeLeftEnd)
Pipe.SetGhostLeft(rhoFace, uFace, pFace);
Pipe.SetGhostLeft(rhoFace, uFace, pFace, airFracGhost);
else
Pipe.SetGhostRight(rhoFace, uFace, pFace);
Pipe.SetGhostRight(rhoFace, uFace, pFace, airFracGhost);
// Store results (positive = into volume)
LastMassFlowRate = -_mdot;
@@ -145,9 +158,9 @@ namespace FluidSim.Core
: Pipe.GetInteriorStateRight();
if (IsPipeLeftEnd)
Pipe.SetGhostLeft(rInt, -uInt, pInt);
Pipe.SetGhostLeft(rInt, -uInt, pInt, IsPipeLeftEnd ? Pipe.GetInteriorAirFractionLeft() : Pipe.GetInteriorAirFractionRight());
else
Pipe.SetGhostRight(rInt, -uInt, pInt);
Pipe.SetGhostRight(rInt, -uInt, pInt, IsPipeLeftEnd ? Pipe.GetInteriorAirFractionLeft() : Pipe.GetInteriorAirFractionRight());
LastMassFlowRate = 0.0;
LastFaceDensity = rInt;