diff --git a/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.C b/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.C
index 41f4da6a3d..702abded1e 100644
--- a/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.C
+++ b/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.C
@@ -102,6 +102,12 @@ void Foam::InteractingKinematicParcel<ParcelType>::calc
     const scalar rho0 = rho_;
     const scalar mass0 = mass();
 
+    // Reynolds number
+    const scalar Re = this->Re(U0, d0, rhoc_, muc_);
+
+
+    // Sources
+    //~~~~~~~~
 
     // Explicit momentum source for particle
     vector Su = vector::zero;
@@ -115,7 +121,8 @@ void Foam::InteractingKinematicParcel<ParcelType>::calc
     // ~~~~~~
 
     // Calculate new particle velocity
-    vector U1 = calcVelocity(td, dt, cellI, d0, U0, rho0, mass0, Su, dUTrans);
+    vector U1 =
+        calcVelocity(td, dt, cellI, Re, muc_, d0, U0, rho0, mass0, Su, dUTrans);
 
 
     // Accumulate carrier phase source terms
@@ -140,6 +147,8 @@ const Foam::vector Foam::InteractingKinematicParcel<ParcelType>::calcVelocity
     TrackData& td,
     const scalar dt,
     const label cellI,
+    const scalar Re,
+    const scalar mu,
     const scalar d,
     const vector& U,
     const scalar rho,
@@ -151,8 +160,7 @@ const Foam::vector Foam::InteractingKinematicParcel<ParcelType>::calcVelocity
     const polyMesh& mesh = this->cloud().pMesh();
 
     // Momentum transfer coefficient
-    const scalar utc =
-        td.cloud().drag().utc(U - Uc_, d, rhoc_, muc_) + ROOTVSMALL;
+    const scalar utc = td.cloud().drag().utc(Re, d, mu) + ROOTVSMALL;
 
     // Momentum source due to particle forces
     const vector FCoupled =
diff --git a/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.H b/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.H
index 4eb4919572..ea7fd7dc37 100644
--- a/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.H
+++ b/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcel.H
@@ -49,7 +49,6 @@ SourceFiles
 #include "autoPtr.H"
 #include "interpolationCellPoint.H"
 #include "contiguous.H"
-#include "mathConstants.H"
 
 #include "InteractingKinematicCloud.H"
 
@@ -243,6 +242,8 @@ protected:
             TrackData& td,
             const scalar dt,           // timestep
             const label cellI,         // owner cell
+            const scalar Re,           // Reynolds number
+            const scalar mu,           // local carrier viscosity
             const scalar d,            // diameter
             const vector& U,           // velocity
             const scalar rho,          // density
@@ -401,6 +402,15 @@ public:
             //- Surface area for given diameter
             inline scalar areaS(const scalar d) const;
 
+            //- Reynolds number
+            inline scalar Re
+            (
+                const vector& U,        // particle velocity
+                const scalar d,         // particle diameter
+                const scalar rhoc,      // carrier density
+                const scalar muc        // carrier dynamic viscosity
+            ) const;
+
 
         // Main calculation loop
 
diff --git a/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcelI.H b/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcelI.H
index 04c02f65a1..8391555d4f 100644
--- a/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcelI.H
+++ b/src/lagrangian/intermediate/parcels/Templates/InteractingKinematicParcel/InteractingKinematicParcelI.H
@@ -24,6 +24,10 @@ License
 
 \*---------------------------------------------------------------------------*/
 
+#include "mathConstants.H"
+
+using namespace Foam::constant;
+
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 template <class ParcelType>
@@ -374,7 +378,7 @@ template <class ParcelType>
 inline Foam::scalar
 Foam::InteractingKinematicParcel<ParcelType>::volume(const scalar d) const
 {
-    return constant::math::pi/6.0*pow3(d);
+    return math::pi/6.0*pow3(d);
 }
 
 
@@ -404,7 +408,21 @@ template <class ParcelType>
 inline Foam::scalar
 Foam::InteractingKinematicParcel<ParcelType>::areaS(const scalar d) const
 {
-    return constant::math::pi*d*d;
+    return math::pi*d*d;
+}
+
+
+template <class ParcelType>
+inline Foam::scalar
+Foam::InteractingKinematicParcel<ParcelType>::Re
+(
+    const vector& U,
+    const scalar d,
+    const scalar rhoc,
+    const scalar muc
+) const
+{
+    return rhoc*mag(U - Uc_)*d/muc;
 }