apply some formatting changes [ci skip]

src/lagrangian/cfdemParticle/cfdTools/versionInfo.H

@@ -39,7 +39,7 @@ word compatibleLIGGGHTSversion="PFM 19.02";
 word OFversion="4.x";
 
 Info << "\nCFDEMcoupling version: " << CFDEMversion <<  endl;
-Info << ", compatible to LIGGGHTS version: " << compatibleLIGGGHTSversion <<  endl;
-Info << ", compatible to OpenFOAM version: " << OFversion <<  endl;
+Info << "compatible to LIGGGHTS version: " << compatibleLIGGGHTSversion <<  endl;
+Info << "compatible to OpenFOAM version: " << OFversion <<  endl;
 
 #endif

src/lagrangian/cfdemParticle/cfdemCloud/cfdemCloud.C

@@ -665,7 +665,7 @@ bool cfdemCloud::evolve
         }
 
         //============================================
-        //CHECK JUST TIME-INTERPOATE ALREADY SMOOTHENED VOIDFRACTIONNEXT AND UsNEXT FIELD
+        //CHECK JUST TIME-INTERPOLATE ALREADY SMOOTHENED VOIDFRACTIONNEXT AND UsNEXT FIELD
         //      IMPLICIT FORCE CONTRIBUTION AND SOLVER USE EXACTLY THE SAME AVERAGED
         //      QUANTITIES AT THE GRID!
         scalar timeStepFrac = dataExchangeM().timeStepFraction();

src/lagrangian/cfdemParticle/subModels/dataExchangeModel/dataExchangeModel/dataExchangeModel.H

@@ -186,15 +186,15 @@ public:
 
         inline int couplingInterval() const { return couplingInterval_; }
 
-        inline scalar couplingTime() const { return couplingInterval_*DEMts_; }
+        inline scalar couplingTime() const { return couplingInterval_ * DEMts_; }
 
         inline scalar TSstart() const { return particleCloud_.mesh().time().startTime().value()
                                         + (couplingStep_-1) * couplingTime(); }
 
-        inline scalar TSend() const { return particleCloud_.mesh().time().startTime().value()
-                                        + (couplingStep_) * couplingTime(); }
+        inline scalar TSend() const   { return particleCloud_.mesh().time().startTime().value()
+                                        + (couplingStep_  ) * couplingTime(); }
 
-        inline int DEMstepsTillT(scalar t) const { return (t - (particleCloud_.mesh().time().value() - couplingTime())  + SMALL) / DEMts_; }
+        inline int DEMstepsTillT(scalar t) const { return (t - (particleCloud_.mesh().time().value() - couplingTime()) + SMALL) / DEMts_; }
 
         inline void checkTSsize() const
         {
@@ -210,7 +210,7 @@ public:
                 Info << "particleCloud_.mesh().time().deltaT().value() = " << particleCloud_.mesh().time().deltaT().value() << endl;
                 Info << "couplingInterval_ = " << couplingInterval_ << endl;
                 Info << "DEMts_ = " << DEMts_ << endl;
-                Warning << "\nWarning - Coupling time (= DEM time step * coupling interval) is not a multiple of  CFD time-step!\n" << endl;
+                Warning << "\nWarning - Coupling time (= DEM time step * coupling interval) is not a multiple of CFD time-step!\n" << endl;
             }
             if (!particleCloud_.allowCFDsubTimestep())
                 if (particleCloud_.mesh().time().deltaT().value() < couplingInterval_ * DEMts_ + SMALL)

src/lagrangian/cfdemParticle/subModels/dataExchangeModel/twoWayMPI/twoWayMPI.C

@@ -66,7 +66,7 @@ twoWayMPI::twoWayMPI
     propsDict_(dict.subDict(typeName + "Props")),
     lmp(NULL)
 {
-    Info<<"Starting up LIGGGHTS for first time execution"<<endl;
+    Info << "Starting up LIGGGHTS for first time execution" << endl;
 
     MPI_Comm_dup(MPI_COMM_WORLD, &comm_liggghts);
 
@@ -74,8 +74,8 @@ twoWayMPI::twoWayMPI
     const fileName liggghtsPath(propsDict_.lookup("liggghtsPath"));
 
     // open LIGGGHTS input script
-    Info<<"Executing input script '"<< liggghtsPath.c_str() <<"'"<<endl;
-    lmp = new LAMMPS_NS::LAMMPS(0,NULL,comm_liggghts);
+    Info << "Executing input script '" << liggghtsPath.c_str() << "'" << endl;
+    lmp = new LAMMPS_NS::LAMMPS(0, NULL, comm_liggghts);
     lmp->input->file(liggghtsPath.c_str());
 
     // get DEM time step size

src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.H

@@ -17,6 +17,11 @@ Description
     drag law for monodisperse systems according to
     Beetstra et al. AIChE J 53.2 (2007)
 
+Reference
+    R. Beetstra, M.A. van der Hoef, J.A.M. Kuipers
+    "Drag force of intermediate Reynolds number flow past mono- and bidisperse arrays of spheres"
+    AIChE Journal, 53 (2007)
+
 SourceFiles
     BeetstraDrag.C
 \*---------------------------------------------------------------------------*/
@@ -86,12 +91,12 @@ protected:
     virtual void adaptVoidfraction(double&, label) const {}
 
     virtual scalar effDiameter(double d, label cellI, label index) const {return d;}
-    
+
     virtual scalar meanSauterDiameter(double d, label cellI) const {return d;}
 
     double F(double, double) const;
 
-    double terminalVelocity(double, double, double, double, double, double) const; 
+    double terminalVelocity(double, double, double, double, double, double) const;
 
     double a(double) const;
 

src/lagrangian/cfdemParticle/subModels/forceModel/GidaspowDrag/GidaspowDrag.H

@@ -34,6 +34,11 @@ Description
     - splits off explicit drag component due to fluctuation in fluid and particle
       velocity (optional via forceSubModel "ImExCorr")
 
+Reference
+    D. Gidaspow
+    "Multiphase flow and fluidization: Continuum and kinetic theory description",
+    1994
+
 Class
     GidaspowDrag
 

src/lagrangian/cfdemParticle/subModels/forceModel/forceSubModels/forceSubModel/forceSubModel.H

@@ -82,6 +82,7 @@ protected:
 
         List<Switch> switchesList_;         // switches which are requested from dict
 
+        // a Switch is set to false in the default Switch constructor
         List<Switch> switches_;             // switch status
 
         mutable volScalarField nu_;

src/lagrangian/cfdemParticle/subModels/forceModel/interface/interface.H

@@ -28,6 +28,12 @@ Description
     This code is designed to realize coupled CFD-DEM simulations using LIGGGHTS
     and OpenFOAM(R). Note: this code is not part of OpenFOAM(R) (see DISCLAIMER).
 
+Reference
+    G. Wierink, C. Goniva, B. Niceno, K. Heiskanen,
+    "Mechanistic Modelling of Particle-Interface Interaction in Three-Phase Flows",
+    Proc. of the 8th Int. Conf. on CFD in Oil and Gas, Metallurgical and Process Industries,
+    Trondheim, 2011
+
 Class
     interface
 

src/lagrangian/cfdemParticle/subModels/forceModel/virtualMassForce/virtualMassForce.H

@@ -28,6 +28,10 @@ Description
     This code is designed to realize coupled CFD-DEM simulations using LIGGGHTS
     and OpenFOAM(R). Note: this code is not part of OpenFOAM(R) (see DISCLAIMER).
 
+Reference
+    Crowe, Clayton T.; Sommerfeld, Martin; Tsuji, Yutaka (1998).
+    "Multiphase flows with droplets and particles"
+
 Class
     virtualMassForce
 

src/lagrangian/cfdemParticle/subModels/liggghtsCommandModel/liggghtsCommandModel/newLiggghtsCommandModel.C

@@ -50,7 +50,7 @@ autoPtr<liggghtsCommandModel> liggghtsCommandModel::New
 )
 {
     Info<< "Selecting liggghtsCommandModel "
-         << liggghtsCommandType << " ,provide dicts, numbered from 0 to n" << endl;
+         << liggghtsCommandType << ", provide dicts, numbered from 0 to n" << endl;
 
     dictionaryConstructorTable::iterator cstrIter =
         dictionaryConstructorTablePtr_->find(liggghtsCommandType);

src/lagrangian/cfdemParticle/subModels/liggghtsCommandModel/writeLiggghts/writeLiggghts.C

@@ -94,7 +94,7 @@ writeLiggghts::writeLiggghts
     {
         overwrite_ = Switch(propsDict_.lookup("overwrite"));
     }
-    
+
     if (writeLast_)
     {
         runLast_ = true;
@@ -103,7 +103,7 @@ writeLiggghts::writeLiggghts
     {
         //Warning << "Using invalid options of writeLiggghts, please use 'writeLast' option." << endl;
         runEveryWriteStep_ = true;
-    }    
+    }
 
 
     command_ += " " + path_ + "/" + writeName_;