adding solver files

applications/solvers/lagrangian/trackedReactingParcelFoam/chemistry.H

+{
+    Info << "Solving chemistry" << endl;
+
+    chemistry.solve
+    (
+        runTime.value() - runTime.deltaT().value(),
+        runTime.deltaT().value()
+    );
+
+    // turbulent time scale
+    if (turbulentReaction)
+    {
+        DimensionedField<scalar, volMesh> tk =
+            Cmix*sqrt(turbulence->muEff()/rho/turbulence->epsilon());
+        DimensionedField<scalar, volMesh> tc =
+            chemistry.tc()().dimensionedInternalField();
+
+        // Chalmers PaSR model
+        kappa = (runTime.deltaT() + tc)/(runTime.deltaT() + tc + tk);
+    }
+    else
+    {
+        kappa = 1.0;
+    }
+}

applications/solvers/lagrangian/trackedReactingParcelFoam/hEqn.H

+{
+    fvScalarMatrix hEqn
+    (
+        fvm::ddt(rho, h)
+      + mvConvection->fvmDiv(phi, h)
+      - fvm::laplacian(turbulence->alphaEff(), h)
+     ==
+        DpDt
+     +  parcels.Sh()
+     +  radiation->Sh(thermo)
+    );
+
+    hEqn.relax();
+
+    hEqn.solve();
+
+    thermo.correct();
+
+    radiation->correct();
+}

applications/solvers/lagrangian/trackedReactingParcelFoam/readChemistryProperties.H

+Info<< "Reading chemistry properties\n" << endl;
+
+IOdictionary chemistryProperties
+(
+    IOobject
+    (
+        "chemistryProperties",
+        runTime.constant(),
+        mesh,
+        IOobject::MUST_READ,
+        IOobject::NO_WRITE
+    )
+);
+
+Switch turbulentReaction(chemistryProperties.lookup("turbulentReaction"));
+
+dimensionedScalar Cmix("Cmix", dimless, 1.0);
+
+if (turbulentReaction)
+{
+    chemistryProperties.lookup("Cmix") >> Cmix;
+}