diff --git a/tutorials/combustion/reactingFoam/RAS/membrane/0/include b/tutorials/combustion/reactingFoam/RAS/membrane/0/include
index edde41bc55..bfd1ccf804 100644
--- a/tutorials/combustion/reactingFoam/RAS/membrane/0/include
+++ b/tutorials/combustion/reactingFoam/RAS/membrane/0/include
@@ -18,8 +18,8 @@ FoamFile
 sleeve
 {
     CH4 0;
-    N2  0.79;
-    O2  0.21;
+    N2  0.77;
+    O2  0.23;
 }
 
 pipe
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/N2 b/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/N2
index 61dbd8c0ec..e0a4f31475 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/N2
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/N2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.79;
+internalField   uniform 0.77;
 
 boundaryField
 {
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/O2 b/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/O2
index 0b6e0c9aca..76dd31ec28 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/O2
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/reverseBurner/0/gas/O2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.21;
+internalField   uniform 0.23;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/N2 b/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/N2
index e88fd39216..10e647b6d9 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/N2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/N2
@@ -18,7 +18,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.79;
+internalField   uniform 0.77;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/O2 b/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/O2
index 34d3805e85..38a4d58560 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/O2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/cylinder/0/O2
@@ -18,7 +18,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.21;
+internalField   uniform 0.23;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/N2 b/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/N2
index 1eba2c792e..8c2ea495fc 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/N2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/N2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.79;
+internalField   uniform 0.77;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/O2 b/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/O2
index d450abcd9f..a826b24177 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/O2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/hotBoxes/0/O2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.21;
+internalField   uniform 0.23;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/N2 b/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/N2
index 7f69d981f1..7fb3cb1b17 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/N2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/N2
@@ -18,7 +18,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.79;
+internalField   uniform 0.77;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/O2 b/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/O2
index 9bab694fff..dc931177af 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/O2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/rivuletPanel/0/O2
@@ -18,7 +18,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.21;
+internalField   uniform 0.23;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/N2 b/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/N2
index b75a81ae1d..5e2ecd27a3 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/N2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/N2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.79;
+internalField   uniform 0.77;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/O2 b/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/O2
index aece5c46a5..d71410e18d 100644
--- a/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/O2
+++ b/tutorials/lagrangian/buoyantReactingParticleFoam/splashPanel/0/O2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.21;
+internalField   uniform 0.23;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/N2 b/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/N2
index caf8c93ab1..b0d7fbeab2 100644
--- a/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/N2
+++ b/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/N2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.79;
+internalField   uniform 0.77;
 
 boundaryField
 {
@@ -28,7 +28,7 @@ boundaryField
     inlet
     {
         type            fixedValue;
-        value           uniform 0.79;
+        value           $internalField;
     }
     outlet
     {
diff --git a/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/O2 b/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/O2
index fe8582c275..926a2a0323 100644
--- a/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/O2
+++ b/tutorials/lagrangian/reactingParticleFoam/filter/0.orig/O2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.21;
+internalField   uniform 0.23;
 
 boundaryField
 {
@@ -28,7 +28,7 @@ boundaryField
     inlet
     {
         type            fixedValue;
-        value           uniform 0.21;
+        value           $internalField;
     }
     outlet
     {
diff --git a/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/N2 b/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/N2
index 3f1e00b3e2..4ef2331188 100644
--- a/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/N2
+++ b/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/N2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.79;
+internalField   uniform 0.77;
 
 boundaryField
 {
diff --git a/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/O2 b/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/O2
index 7628cc4011..16fa4a11f9 100644
--- a/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/O2
+++ b/tutorials/lagrangian/reactingParticleFoam/simplifiedSiwek/0/O2
@@ -17,7 +17,7 @@ FoamFile
 
 dimensions      [0 0 0 0 0 0 0];
 
-internalField   uniform 0.21;
+internalField   uniform 0.23;
 
 boundaryField
 {