ENH: Making the collision model able to say whether or not it controls

wall interactions.

If it does, then make the wallImpactDistance 0, if it doesn't make it
d/2.

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

@@ -182,8 +182,8 @@ public:
 
         // Constructors
 
-           //- Construct from components
+            //- Construct from components
-           inline trackData
+            inline trackData
             (
                 KinematicCloud<ParcelType>& cloud,
                 const constantProperties& constProps,

src/lagrangian/intermediate/parcels/Templates/KinematicParcel/KinematicParcelI.H

@@ -439,14 +439,23 @@ inline Foam::scalar Foam::KinematicParcel<ParcelType>::wallImpactDistance
     const vector&
 ) const
 {
-    // Do not use a wall impact distance to allow proper multiple face
+    const KinematicCloud<ParcelType>& c =
-    // collisions.  In a twisted mesh the particle can be within range
+        dynamic_cast<const KinematicCloud<ParcelType>&>(this->cloud());
-    // of a wall but not in the cell attached to a wall face, hence
-    // miss the interaction.
 
-    return 0.0;
+    if (c.collision().controlsWallInteraction())
+    {
+        // Do not use a wall impact distance if the collision model
+        // controls wall interactions to allow proper multiple face
+        // collisions.  In a twisted mesh the particle can be within
+        // range of a wall but not in the cell attached to a wall
+        // face, hence miss the interaction.
 
-    // return 0.5*d_;
+        return 0.0;
+    }
+    else
+    {
+        return 0.5*d_;
+    }
 }
 
 

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

@@ -141,6 +141,10 @@ public:
         //- Flag to indicate whether model activates injection model
         virtual bool active() const = 0;
 
+        //- Indicates whether model determines wall collisions or not,
+        //  used to determine what value to use for wallImpactDistance
+        virtual bool controlsWallInteraction() const = 0;
+
         // Collision function
         virtual void collide() = 0;
 };

src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/NoCollision/NoCollision.C

@@ -61,6 +61,13 @@ bool Foam::NoCollision<CloudType>::active() const
 }
 
 
+template<class CloudType>
+bool Foam::NoCollision<CloudType>::controlsWallInteraction() const
+{
+    return false;
+}
+
+
 template<class CloudType>
 void Foam::NoCollision<CloudType>::collide()
 {}

src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/NoCollision/NoCollision.H

@@ -82,6 +82,10 @@ public:
         //- Flag to indicate whether model activates injection model
         virtual bool active() const;
 
+        //- Indicates whether model determines wall collisions or not,
+        //  used to determine what value to use for wallImpactDistance
+        virtual bool controlsWallInteraction() const;
+
         // Collision function
         virtual void collide();
 };

src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/PairCollision/PairCollision.C

@@ -611,6 +611,13 @@ bool Foam::PairCollision<CloudType>::active() const
 }
 
 
+template<class CloudType>
+bool Foam::PairCollision<CloudType>::controlsWallInteraction() const
+{
+    return true;
+}
+
+
 template<class CloudType>
 void Foam::PairCollision<CloudType>::collide()
 {

src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/PairCollision/PairCollision.H

@@ -174,6 +174,10 @@ public:
         //- Flag to indicate whether model activates injection model
         virtual bool active() const;
 
+        //- Indicates whether model determines wall collisions or not,
+        //  used to determine what value to use for wallImpactDistance
+        virtual bool controlsWallInteraction() const;
+
         // Collision function
         virtual void collide();
 };