clean up header file includes

* include only necessary files
* whenever possible, include headers in .C file not in .H file

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

@@ -29,13 +29,17 @@ Description
     and OpenFOAM(R). Note: this code is not part of OpenFOAM(R) (see DISCLAIMER).
 \*---------------------------------------------------------------------------*/
 
-#include "error.H"
 #include "twoWayMPI.H"
 #include "addToRunTimeSelectionTable.H"
+#include "OFstream.H"
 #include "clockModel.H"
-#include "pair.h"
-#include "force.h"
-#include "forceModel.H"
+#include "liggghtsCommandModel.H"
+
+//LAMMPS/LIGGGHTS
+#include <input.h>
+#include <library_cfd_coupling.h>
+#include <update.h>
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 namespace Foam

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

@@ -41,27 +41,15 @@ SourceFiles
 #ifndef twoWayMPI_H
 #define twoWayMPI_H
 
+#include <mpi.h>
+
 #include "dataExchangeModel.H"
-#include "liggghtsCommandModel.H"
-#include "OFstream.H"
-#include <sys/stat.h>
-#include "pair.h"
-#include "force.h"
-#include "forceModel.H"
 
 //=================================//
 //LAMMPS/LIGGGHTS
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <mpi.h>
 #include <lammps.h>         // these are LAMMPS include files
-#include <input.h>
-#include <atom.h>
-#include <library.h>
-#include <error.h>
-#include <library_cfd_coupling.h>
-#include <update.h>
+#include <pair.h>
+#include <force.h>
 //=================================//
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

src/lagrangian/cfdemParticle/subModels/dataExchangeModel/twoWayOne2One/twoWayOne2One.C

@@ -33,13 +33,19 @@ Contributing authors
 
 \*---------------------------------------------------------------------------*/
 
-
 #include "twoWayOne2One.H"
 #include "addToRunTimeSelectionTable.H"
+#include "OFstream.H"
 #include "clockModel.H"
-#include "pair.h"
-#include "force.h"
-#include "forceModel.H"
+#include "liggghtsCommandModel.H"
+
+//LAMMPS/LIGGGHTS
+#include <atom.h>
+#include <input.h>
+#include <library.h>
+#include <library_cfd_coupling.h>
+#include <memory.h>
+#include <update.h>
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 

src/lagrangian/cfdemParticle/subModels/dataExchangeModel/twoWayOne2One/twoWayOne2One.H

@@ -45,33 +45,19 @@ Contributing authors
 #ifndef twoWayOne2One_H
 #define twoWayOne2One_H
 
+#include <mpi.h>
+
 #include "dataExchangeModel.H"
-#include "liggghtsCommandModel.H"
-#include "OFstream.H"
-#include <sys/stat.h>
-#include "pair.h"
-#include "force.h"
-#include "forceModel.H"
 #include "one2one.H"
 
-#include "meshSearch.H"
+#include <treeBoundBox.H>
 
 //=================================//
 //LAMMPS/LIGGGHTS
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <mpi.h>
-#include <lammps.h>         // these are LAMMPS include files
-#include <input.h>
-#include <atom.h>
-#include <memory.h>
-#include <library.h>
-#include <library_cfd_coupling.h>
-#include <update.h>
-#include <comm.h>
-#include <fix.h>
-#include <fix_property_atom.h>
+#include <lammps.h>          // these are LAMMPS include files
+#include <pair.h>
+#include <force.h>
+#include <fix_property_atom.h> /// needed
 //=================================//
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //