diff --git a/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/PrandtlDelta/PrandtlDelta.C b/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/PrandtlDelta/PrandtlDelta.C
index a2dc5d2003..ffe3412347 100644
--- a/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/PrandtlDelta/PrandtlDelta.C
+++ b/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/PrandtlDelta/PrandtlDelta.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2017 OpenFOAM Foundation
-    Copyright (C) 2020 OpenCFD Ltd.
+    Copyright (C) 2020-2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -68,7 +68,7 @@ Foam::LESModels::PrandtlDelta::PrandtlDelta
     (
         LESdelta::New
         (
-            name,
+            IOobject::groupName("geometricDelta", turbulence.U().group()),
             turbulence,
             dict.optionalSubDict(type() + "Coeffs")
         )
diff --git a/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/maxDeltaxyzCubeRootLESDelta/maxDeltaxyzCubeRootLESDelta.C b/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/maxDeltaxyzCubeRootLESDelta/maxDeltaxyzCubeRootLESDelta.C
index 1ef74e6251..a5ef97812e 100644
--- a/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/maxDeltaxyzCubeRootLESDelta/maxDeltaxyzCubeRootLESDelta.C
+++ b/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/maxDeltaxyzCubeRootLESDelta/maxDeltaxyzCubeRootLESDelta.C
@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2016 OpenCFD Ltd.
+    Copyright (C) 2016-2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -74,8 +74,18 @@ Foam::LESModels::maxDeltaxyzCubeRootLESDelta::maxDeltaxyzCubeRootLESDelta
 )
 :
     LESdelta(name, turbulence),
-    maxDeltaxyz_(name, turbulence, dict.subDict(typeName + "Coeffs")),
-    cubeRootVolDelta_(name, turbulence, dict.subDict(typeName + "Coeffs"))
+    maxDeltaxyz_
+    (
+        name + "maxDeltaxyz",
+        turbulence,
+        dict.subDict(typeName + "Coeffs")
+    ),
+    cubeRootVolDelta_
+    (
+        name + "cubeRootVolDelta",
+        turbulence,
+        dict.subDict(typeName + "Coeffs")
+    )
 {
     calcDelta();
 }
diff --git a/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/smoothDelta/smoothDelta.C b/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/smoothDelta/smoothDelta.C
index 8d36dab575..3f5ed73a6a 100644
--- a/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/smoothDelta/smoothDelta.C
+++ b/src/TurbulenceModels/turbulenceModels/LES/LESdeltas/smoothDelta/smoothDelta.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2017 OpenFOAM Foundation
-    Copyright (C) 2016 OpenCFD Ltd.
+    Copyright (C) 2016-2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -157,7 +157,7 @@ Foam::LESModels::smoothDelta::smoothDelta
     (
         LESdelta::New
         (
-            "geometricDelta",
+            IOobject::groupName("geometricDelta", turbulence.U().group()),
             turbulence,
             dict.optionalSubDict(type() + "Coeffs")
         )