using null constructor for none option

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

@@ -30,6 +30,14 @@ Description
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
+template<class CloudType>
+Foam::DispersionModel<CloudType>::DispersionModel(CloudType& owner)
+:
+    dict_(dictionary::null),
+    owner_(owner)
+{}
+
+
 template<class CloudType>
 Foam::DispersionModel<CloudType>::DispersionModel
 (

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

@@ -81,6 +81,9 @@ public:
 
     // Constructors
 
+        //- Construct null from owner
+        DispersionModel(CloudType& owner);
+
         //- Construct from components
         DispersionModel
         (

src/lagrangian/intermediate/submodels/Kinematic/DispersionModel/NoDispersion/NoDispersion.C

@@ -33,11 +33,11 @@ Description
 template<class CloudType>
 Foam::NoDispersion<CloudType>::NoDispersion
 (
-    const dictionary& dict,
+    const dictionary&,
     CloudType& owner
 )
 :
-    DispersionModel<CloudType>(dict, owner)
+    DispersionModel<CloudType>(owner)
 {}
 
 

src/lagrangian/intermediate/submodels/Kinematic/DispersionModel/NoDispersion/NoDispersion.H

@@ -26,7 +26,7 @@ Class
     Foam::NoDispersion
 
 Description
-    No turbulent dispersion of the parcels
+    Place holder for 'none' option
 
 \*---------------------------------------------------------------------------*/
 
@@ -41,7 +41,7 @@ namespace Foam
 {
 
 /*---------------------------------------------------------------------------*\
-                           Class NoDispersion Declaration
+                       Class NoDispersion Declaration
 \*---------------------------------------------------------------------------*/
 
 template<class CloudType>
@@ -52,7 +52,7 @@ class NoDispersion
 public:
 
     //- Runtime type information
-    TypeName("NoDispersion");
+    TypeName("none");
 
 
     // Constructors