ENH: Correcting pbNumber, shouldn't be divided by number of parcels.

Adding pbFixed so nParticles is specified directly by the user, making
massTotal not determine anything in this case.

Removing unused private data member.

src/lagrangian/intermediate/parcels/Templates/KinematicParcel/KinematicParcel.C

@@ -346,7 +346,7 @@ bool Foam::KinematicParcel<ParcelType>::hitPatch
 {
     ParcelType& p = static_cast<ParcelType&>(*this);
 
-    // Invoke poost-processing mdoel
+    // Invoke post-processing model
     td.cloud().postProcessing().postPatch(p, patchI);
 
     // Invoke surface film model

src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.C

@@ -212,7 +212,12 @@ Foam::scalar Foam::InjectionModel<CloudType>::setNumberOfParticles
         }
         case pbNumber:
         {
-            nP = massTotal_/(rho*volumeTotal_*parcels);
+            nP = massTotal_/(rho*volumeTotal_);
+            break;
+        }
+        case pbFixed:
+        {
+            nP = nParticlesFixed_;
             break;
         }
         default:
@@ -285,6 +290,7 @@ Foam::InjectionModel<CloudType>::InjectionModel(CloudType& owner)
     nInjections_(0),
     parcelsAddedTotal_(0),
     parcelBasis_(pbNumber),
+    nParticlesFixed_(0.0),
     time0_(0.0),
     timeStep0_(0.0)
 {
@@ -310,6 +316,7 @@ Foam::InjectionModel<CloudType>::InjectionModel
     nInjections_(0),
     parcelsAddedTotal_(0),
     parcelBasis_(pbNumber),
+    nParticlesFixed_(0.0),
     time0_(owner.db().time().value()),
     timeStep0_(0.0)
 {
@@ -320,6 +327,7 @@ Foam::InjectionModel<CloudType>::InjectionModel
         << endl;
 
     const word parcelBasisType = coeffDict_.lookup("parcelBasisType");
+
     if (parcelBasisType == "mass")
     {
         parcelBasis_ = pbMass;
@@ -328,6 +336,16 @@ Foam::InjectionModel<CloudType>::InjectionModel
     {
         parcelBasis_ = pbNumber;
     }
+    else if (parcelBasisType == "fixed")
+    {
+        parcelBasis_ = pbFixed;
+
+        Info<< "    Choosing nParticles to be a fixed value, massTotal "
+            << "variable now does not determine anything."
+            << endl;
+
+        nParticlesFixed_ = readScalar(coeffDict_.lookup("nParticles"));
+    }
     else
     {
         FatalErrorIn
@@ -338,7 +356,7 @@ Foam::InjectionModel<CloudType>::InjectionModel
                 "CloudType&, "
                 "const word&"
             ")"
-        )<< "parcelBasisType must be either 'number' or 'mass'" << nl
+        )<< "parcelBasisType must be either 'number', 'mass' or 'fixed'" << nl
          << exit(FatalError);
     }
 

src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.H

@@ -73,7 +73,8 @@ public:
         enum parcelBasis
         {
             pbNumber,
-            pbMass
+            pbMass,
+            pbFixed
         };
 
 
@@ -137,6 +138,10 @@ protected:
             //- Parcel basis enumeration
             parcelBasis parcelBasis_;
 
+            //- nParticles to assign to parcels when the 'fixed' basis
+            //  is selected
+            scalar nParticlesFixed_;
+
             //- Continuous phase time at start of injection time step [s]
             scalar time0_;
 

src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ManualInjection/ManualInjection.H

@@ -76,9 +76,6 @@ class ManualInjection
         //- Parcel size PDF model
         const autoPtr<pdfs::pdf> parcelPDF_;
 
-        //- Number of particles represented by each parcel
-        scalar nParticlesPerParcel_;
-
 
 protected: