diff --git a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/air/p_rgh b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/air/p_rgh
index 7561126b38..10d1549888 100644
--- a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/air/p_rgh
+++ b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/air/p_rgh
@@ -23,25 +23,19 @@ boundaryField
 {
     walls
     {
-        type            buoyantPressure;
-        gradient        uniform 0;
-        value           uniform 100000;
+        type            fixedFluxPressure;
     }
     inlet
     {
-        type            buoyantPressure;
-        gradient        uniform 0;
-        value           uniform 100000;
+        type            fixedFluxPressure;
     }
     outlet
     {
         type            fixedValue;
-        value           uniform 100000;
     }
     blades
     {
-        type            buoyantPressure;
-        value           uniform 100000;
+        type            fixedFluxPressure;
     }
 }
 
diff --git a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/porous/p_rgh b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/porous/p_rgh
index 6b4bc21fb3..955b6b4408 100644
--- a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/porous/p_rgh
+++ b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/0.org/porous/p_rgh
@@ -23,9 +23,7 @@ boundaryField
 {
     inlet
     {
-        type            buoyantPressure;
-        gradient        uniform 0;
-        value           uniform 100000;
+        type            fixedFluxPressure;
     }
     outlet
     {
@@ -34,9 +32,7 @@ boundaryField
     }
     fixedWalls
     {
-        type            buoyantPressure;
-        gradient        uniform 0;
-        value           uniform 100000;
+        type            fixedFluxPressure;
     }
 }