ENH: update tutorials to nre emissivity look up

tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G

@@ -24,7 +24,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+        emissivityMode  lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }

tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault

@@ -24,7 +24,8 @@ boundaryField
     {
         type            greyDiffusiveRadiation;
         T               T;
-        emissivity      1.0;
+        emissivityMode  lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }

tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault

@@ -24,7 +24,8 @@ boundaryField
     {
         type            greyDiffusiveRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }

tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoom/0/G

@@ -24,7 +24,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 

tutorials/heatTransfer/buoyantSimpleRadiationFoam/hotRadiationRoomFvDOM/0/IDefault

@@ -24,7 +24,8 @@ boundaryField
     {
         type            greyDiffusiveRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }

tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G

@@ -25,21 +25,24 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     bottom
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     walls
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     symmetry

tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/0/G

@@ -25,7 +25,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
         refValue        uniform 0;
         refGradient     uniform 0;
@@ -35,7 +36,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
         refValue        uniform 0;
         refGradient     uniform 0;

tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/parcelInBox/0/G

@@ -33,7 +33,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     outlet
@@ -44,7 +45,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }

tutorials/lagrangian/reactingParcelFoam/evaporationTest/0/G

@@ -25,7 +25,8 @@ boundaryField
     {
         type            MarshakRadiation;
         T               T;
-        emissivity      1.0;
+	emissivityMode	lookup;
+        emissivity      uniform 1.0;
         value           uniform 0;
     }
     frontAndBack