tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection: Improved stability

Main changes in the tutorial:
  - General cleanup of the phaseProperties of unnecessary entries
  - sensibleEnthalpy is used for both phases
  - setTimeStep functionObject is used to set a sharp reduction in time step near the start of the injection
  - Monitoring of pressure minimum and maximum

Patch contributed by Juho Peltola, VTT.

applications/solvers/multiphase/reactingEulerFoam/phaseSystems/reactionThermo/hRefConstThermos.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2015 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2015-2017 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -253,6 +253,14 @@ makeReactionMixtureThermo
     constRefRhoConstHThermoPhysics
 );
 
+makeReactionMixtureThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    multiComponentMixture,
+    constRefFluidHThermoPhysics
+);
 
 makeReactionMixtureThermo
 (

tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/constant/fvOptions

@@ -71,7 +71,7 @@ options
             volumeMode      absolute;
             injectionRateSuSp
             {
-                e.steam      (3700 0); // kg*m^2/s^3
+                h.steam      (3700 0); // kg*m^2/s^3
             }
         }
     }

tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/constant/phaseProperties

@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-type    thermalPhaseChangeTwoPhaseSystem;
+type thermalPhaseChangeTwoPhaseSystem;
 
 phases (steam water);
 
@@ -34,7 +34,7 @@ steam
     }
     Sc              0.7;
 
-    residualAlpha   1e-6;
+    residualAlpha   1e-3;
 }
 
 water
@@ -47,7 +47,7 @@ water
     }
     Sc              0.7;
 
-    residualAlpha   1e-6;
+    residualAlpha   1e-3;
 }
 
 blending
@@ -56,30 +56,6 @@ blending
     {
         type            none;
         continuousPhase water;
-        minFullyContinuousAlpha.steam 0.7;
-        minPartlyContinuousAlpha.steam 0.5;
-        minFullyContinuousAlpha.water 0.7;
-        minPartlyContinuousAlpha.water 0.5;
-    }
-
-    heatTransfer
-    {
-        type            none;
-        continuousPhase water;
-        minFullyContinuousAlpha.steam 1;
-        minPartlyContinuousAlpha.steam 0;
-        minFullyContinuousAlpha.water 1;
-        minPartlyContinuousAlpha.water 0;
-    }
-
-    massTransfer
-    {
-        type            none;
-        continuousPhase water;
-        minFullyContinuousAlpha.steam 1;
-        minPartlyContinuousAlpha.steam 0;
-        minFullyContinuousAlpha.water 1;
-        minPartlyContinuousAlpha.water 0;
     }
 }
 
@@ -107,12 +83,6 @@ aspectRatio
         type            constant;
         E0              1.0;
     }
-
-    (water in steam)
-    {
-        type            constant;
-        E0              1.0;
-    }
 );
 
 drag
@@ -126,16 +96,6 @@ drag
             type        none;
         }
     }
-
-    (water in steam)
-    {
-        type            SchillerNaumann;
-        residualRe      1e-3;
-        swarmCorrection
-        {
-            type        none;
-        }
-    }
 );
 
 virtualMass
@@ -145,27 +105,18 @@ virtualMass
         type            constantCoefficient;
         Cvm             0.5;
     }
-
-    (water in steam)
-    {
-        type            constantCoefficient;
-        Cvm             0.5;
-    }
 );
 
 interfaceComposition
+();
+
+heatTransfer
 (
     (steam in water)
     {
-        type Saturated;
+        type spherical;
-        species ( H2O );
+        residualAlpha 1e-4;
-        Le 1.0;
-        saturationPressure
-        {
-            type ArdenBuck;
-        }
     }
-
 );
 
 heatTransfer.steam
@@ -187,33 +138,19 @@ heatTransfer.water
 );
 
 massTransfer.steam
-(
+();
-
-);
 
 massTransfer.water
-(
+();
-
-);
 
 lift
-(
+();
-);
 
 wallLubrication
-(
+();
-);
 
 turbulentDispersion
-(
+();
-    (steam in water)
-    {
-        type                Burns;//
-        sigma               0.7;
-        Ctd                 1.0;
-        residualAlpha       1e-3;
-    }
-);
 
 // Minimum allowable pressure
 pMin            10000;

tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/constant/thermophysicalProperties.steam

@@ -23,9 +23,13 @@ thermoType
     thermo          hRefConst;
     equationOfState perfectGas;
     specie          specie;
-    energy          sensibleInternalEnergy;
+    energy          sensibleEnthalpy;
 }
 
+dpdt yes;
+
+pressureWorkAlphaLimit 0;
+
 species
 (
     water

tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/constant/thermophysicalProperties.water

@@ -23,9 +23,13 @@ thermoType
     thermo          hRefConst;
     equationOfState perfectFluid;
     specie          specie;
-    energy          sensibleInternalEnergy;
+    energy          sensibleEnthalpy;
 }
 
+dpdt yes;
+
+pressureWorkAlphaLimit 0;
+
 species
 (
     water

tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/system/controlDict

@@ -25,11 +25,11 @@ stopAt          endTime;
 
 endTime         10;
 
-deltaT          1e-6;
+deltaT          1e-3;
 
 writeControl    adjustableRunTime;
 
-writeInterval   0.5;
+writeInterval   0.1;
 
 purgeWrite      0;
 
@@ -41,7 +41,7 @@ writeCompression compressed;
 
 timeFormat      general;
 
-timePrecision   6;
+timePrecision   9;
 
 runTimeModifiable yes;
 
@@ -51,5 +51,30 @@ maxCo           0.1;
 
 maxDeltaT       1e-2;
 
+functions
+{
+    timeStepping
+    {
+        type            setTimeStep;
+        functionObjectLibs ("libutilityFunctionObjects.so");
+        enabled         yes;
+        deltaT          tableFile;
+        file            "system/deltaTvalues";
+    }
+
+    minMaxp
+    {
+        type        fieldMinMax;
+        functionObjectLibs ("libfieldFunctionObjects.so");
+        fields
+        (
+             p
+        );
+        location        no;
+        writeControl    timeStep;
+        writeInterval   1;
+    }
+}
+
 
 // ************************************************************************* //

tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/system/deltaTvalues

@@ -0,0 +1,9 @@
+(
+    (0 1e-3)
+    (0.99 1e-3)
+    (0.999 1e-4)
+    (0.9999 1e-5)
+    (1.001 1e-5)
+    (1.01 1e-4)
+    (1.1 1e-3)
+);

tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/system/fvSolution

@@ -27,8 +27,8 @@ solvers
     {
         solver          PCG;
         preconditioner  DIC;
-        tolerance       1e-8;
+        tolerance       1e-10;
-        relTol          0;
+        relTol          0.001;
     }
 
     p_rghFinal
@@ -78,10 +78,10 @@ solvers
 
 PIMPLE
 {
-    nOuterCorrectors 4;
+    nOuterCorrectors 3;
     nCorrectors      1;
     nNonOrthogonalCorrectors 0;
-    nEnergyCorrectors 1;
+    nEnergyCorrectors 2;
     faceMomentum    yes;
 }
 
@@ -89,7 +89,7 @@ relaxationFactors
 {
     fields
     {
-        iDmdt 1;
+        iDmdt           1;
     }
 
     equations