diff --git a/src/functionObjects/field/blendingFactor/blendingFactor.C b/src/functionObjects/field/blendingFactor/blendingFactor.C
index 9b76f3b4f5..83b3cff5ac 100644
--- a/src/functionObjects/field/blendingFactor/blendingFactor.C
+++ b/src/functionObjects/field/blendingFactor/blendingFactor.C
@@ -78,8 +78,6 @@ bool Foam::functionObjects::blendingFactor::read(const dictionary& dict)
 {
     phiName_ = dict.lookupOrDefault<word>("phi", "phi");
 
-    resultName_ = "blendingFactor:" + fieldName_;
-
     return true;
 }
 
diff --git a/src/functionObjects/field/components/componentsTemplates.C b/src/functionObjects/field/components/componentsTemplates.C
index be4294d07e..7b2c17f4fd 100644
--- a/src/functionObjects/field/components/componentsTemplates.C
+++ b/src/functionObjects/field/components/componentsTemplates.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2016-2018 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2016-2019 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -41,10 +41,8 @@ bool Foam::functionObjects::components::calcFieldComponents()
 
     for (direction i=0; i<Type::nComponents; i++)
     {
-        resultName_ = fieldName_ + word(Type::componentNames[i]);
-        resultNames_[i] = resultName_;
-
-        stored = stored && store(resultName_, field.component(i));
+        resultNames_[i] = fieldName_ + word(Type::componentNames[i]);
+        stored = stored && store(resultNames_[i], field.component(i));
     }
 
     return stored;
diff --git a/src/functionObjects/field/fieldExpression/fieldExpression.H b/src/functionObjects/field/fieldExpression/fieldExpression.H
index 7dbe79ba16..395bad81e7 100644
--- a/src/functionObjects/field/fieldExpression/fieldExpression.H
+++ b/src/functionObjects/field/fieldExpression/fieldExpression.H
@@ -60,7 +60,7 @@ protected:
     // Protected member data
 
         //- Name of field to process
-        word fieldName_;
+        const word fieldName_;
 
         //- Name of result field
         word resultName_;
diff --git a/src/functionObjects/field/randomise/randomise.C b/src/functionObjects/field/randomise/randomise.C
index 6d164b3520..eaa84bf485 100644
--- a/src/functionObjects/field/randomise/randomise.C
+++ b/src/functionObjects/field/randomise/randomise.C
@@ -63,7 +63,7 @@ Foam::functionObjects::randomise::randomise
     const dictionary& dict
 )
 :
-    fieldExpression(name, runTime, dict, typeName)
+    fieldExpression(name, runTime, dict, fieldName_ + "Random", fieldName_)
 {
     read(dict);
 }
diff --git a/src/functionObjects/field/randomise/randomiseTemplates.C b/src/functionObjects/field/randomise/randomiseTemplates.C
index 80df0f43ce..fa50d10017 100644
--- a/src/functionObjects/field/randomise/randomiseTemplates.C
+++ b/src/functionObjects/field/randomise/randomiseTemplates.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2016-2018 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2016-2019 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -37,8 +37,6 @@ bool Foam::functionObjects::randomise::calcRandomised()
     {
         const VolFieldType& field = lookupObject<VolFieldType>(fieldName_);
 
-        resultName_ = fieldName_ + "Random";
-
         tmp<VolFieldType> rfieldt(new VolFieldType(field));
         VolFieldType& rfield = rfieldt.ref();