diff --git a/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C b/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C
index c68231649a..d997ddee5b 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C
+++ b/src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C
@@ -746,7 +746,7 @@ turbulentDFSEMInletFvPatchVectorField
     nCellPerEddy_(5),
     patchNormal_(vector::zero),
     v0_(0),
-    rndGen_(0, -1),
+    rndGen_(),
     sigmax_(size(), 0),
     maxSigmaX_(0),
     nEddy_(0),
diff --git a/src/functionObjects/field/extractEulerianParticles/extractEulerianParticles/extractEulerianParticles.H b/src/functionObjects/field/extractEulerianParticles/extractEulerianParticles/extractEulerianParticles.H
index effb0904fc..580babf826 100644
--- a/src/functionObjects/field/extractEulerianParticles/extractEulerianParticles/extractEulerianParticles.H
+++ b/src/functionObjects/field/extractEulerianParticles/extractEulerianParticles/extractEulerianParticles.H
@@ -71,7 +71,6 @@ SourceFiles
 #include "surfaceFieldsFwd.H"
 #include "vectorList.H"
 #include "globalIndex.H"
-#include "cachedRandom.H"
 #include "eulerianParticle.H"
 #include "IOdictionary.H"
 #include "injectedParticleCloud.H"
diff --git a/src/functionObjects/field/particleDistribution/particleDistribution.C b/src/functionObjects/field/particleDistribution/particleDistribution.C
index 71919b0933..b8cf35122b 100644
--- a/src/functionObjects/field/particleDistribution/particleDistribution.C
+++ b/src/functionObjects/field/particleDistribution/particleDistribution.C
@@ -61,7 +61,7 @@ Foam::functionObjects::particleDistribution::particleDistribution
     cloudName_("unknown-cloudName"),
     nameVsBinWidth_(),
     tagFieldName_("none"),
-    rndGen_(1234, -1),
+    rndGen_(),
     writerPtr_(nullptr)
 {
     read(dict);
diff --git a/src/lagrangian/intermediate/clouds/Templates/KinematicCloud/KinematicCloud.C b/src/lagrangian/intermediate/clouds/Templates/KinematicCloud/KinematicCloud.C
index d82b1bba67..31054caa50 100644
--- a/src/lagrangian/intermediate/clouds/Templates/KinematicCloud/KinematicCloud.C
+++ b/src/lagrangian/intermediate/clouds/Templates/KinematicCloud/KinematicCloud.C
@@ -316,13 +316,7 @@ Foam::KinematicCloud<CloudType>::KinematicCloud
     (
         particleProperties_.subOrEmptyDict("subModels", solution_.active())
     ),
-    rndGen_
-    (
-        label(0),
-        solution_.steadyState() ?
-        particleProperties_.lookupOrDefault<label>("randomSampleSize", 100000)
-      : -1
-    ),
+    rndGen_(),
     cellOccupancyPtr_(),
     cellLengthScale_(cbrt(mesh_.V())),
     rho_(rho),
@@ -515,7 +509,7 @@ Foam::KinematicCloud<CloudType>::KinematicCloud
     solution_(mesh),
     constProps_(),
     subModelProperties_(dictionary::null),
-    rndGen_(0, 0),
+    rndGen_(),
     cellOccupancyPtr_(nullptr),
     cellLengthScale_(c.cellLengthScale_),
     rho_(c.rho_),
diff --git a/src/regionModels/surfaceFilmModels/submodels/kinematic/force/contactAngleForce/contactAngleForce.C b/src/regionModels/surfaceFilmModels/submodels/kinematic/force/contactAngleForce/contactAngleForce.C
index 9e6c790540..ef46144e4b 100644
--- a/src/regionModels/surfaceFilmModels/submodels/kinematic/force/contactAngleForce/contactAngleForce.C
+++ b/src/regionModels/surfaceFilmModels/submodels/kinematic/force/contactAngleForce/contactAngleForce.C
@@ -99,7 +99,7 @@ contactAngleForce::contactAngleForce
 :
     force(typeName, owner, dict),
     Ccf_(readScalar(coeffDict_.lookup("Ccf"))),
-    rndGen_(label(0), -1),
+    rndGen_(),
     distribution_
     (
         distributionModels::distributionModel::New
diff --git a/src/regionModels/surfaceFilmModels/submodels/kinematic/injectionModel/drippingInjection/drippingInjection.C b/src/regionModels/surfaceFilmModels/submodels/kinematic/injectionModel/drippingInjection/drippingInjection.C
index a429af6bec..3a1e40b494 100644
--- a/src/regionModels/surfaceFilmModels/submodels/kinematic/injectionModel/drippingInjection/drippingInjection.C
+++ b/src/regionModels/surfaceFilmModels/submodels/kinematic/injectionModel/drippingInjection/drippingInjection.C
@@ -57,7 +57,7 @@ drippingInjection::drippingInjection
     injectionModel(type(), owner, dict),
     deltaStable_(readScalar(coeffDict_.lookup("deltaStable"))),
     particlesPerParcel_(readScalar(coeffDict_.lookup("particlesPerParcel"))),
-    rndGen_(label(0), -1),
+    rndGen_(),
     parcelDistribution_
     (
         distributionModels::distributionModel::New