Add phaseUsage() method to BlackoilPropertiesInterface.

Also implement method in derived classes.

opm/core/props/BlackoilPropertiesBasic.cpp

@@ -83,6 +83,12 @@ namespace Opm
         return pvt_.numPhases();
     }
 
+    /// \return   Object describing the active phases.
+    PhaseUsage BlackoilPropertiesBasic::phaseUsage() const
+    {
+        return pvt_.phaseUsage();
+    }
+
     /// \param[in]  n      Number of data points.
     /// \param[in]  p      Array of n pressure values.
     /// \param[in]  z      Array of nP surface volume values.

opm/core/props/BlackoilPropertiesBasic.hpp

@@ -73,6 +73,9 @@ namespace Opm
         /// \return   P, the number of phases (also the number of components).
         virtual int numPhases() const;
 
+        /// \return   Object describing the active phases.
+        virtual PhaseUsage phaseUsage() const;
+
         /// \param[in]  n      Number of data points.
         /// \param[in]  p      Array of n pressure values.
         /// \param[in]  z      Array of nP surface volume values.

opm/core/props/BlackoilPropertiesFromDeck.cpp

@@ -147,6 +147,12 @@ namespace Opm
         return pvt_.numPhases();
     }
 
+    /// \return   Object describing the active phases.
+    PhaseUsage BlackoilPropertiesFromDeck::phaseUsage() const
+    {
+        return pvt_.phaseUsage();
+    }
+
     /// \param[in]  n      Number of data points.
     /// \param[in]  p      Array of n pressure values.
     /// \param[in]  z      Array of nP surface volume values.

opm/core/props/BlackoilPropertiesFromDeck.hpp

@@ -89,6 +89,9 @@ namespace Opm
         /// \return   P, the number of phases (also the number of components).
         virtual int numPhases() const;
 
+        /// \return   Object describing the active phases.
+        virtual PhaseUsage phaseUsage() const;
+
         /// \param[in]  n      Number of data points.
         /// \param[in]  p      Array of n pressure values.
         /// \param[in]  z      Array of nP surface volume values.

opm/core/props/BlackoilPropertiesInterface.hpp

@@ -23,6 +23,8 @@
 namespace Opm
 {
 
+    class PhaseUsage;
+
     /// Abstract base class for blackoil fluid and reservoir properties.
     /// Supports variable number of spatial dimensions, called D.
     /// Supports variable number of phases, but assumes that
@@ -59,6 +61,9 @@ namespace Opm
         /// \return   P, the number of phases (also the number of components).
         virtual int numPhases() const = 0;
 
+        /// \return   Object describing the active phases.
+        virtual PhaseUsage phaseUsage() const = 0;
+
         /// \param[in]  n      Number of data points.
         /// \param[in]  p      Array of n pressure values.
         /// \param[in]  z      Array of nP surface volume values.

opm/core/props/pvt/PvtPropertiesBasic.cpp

@@ -85,6 +85,30 @@ namespace Opm
         return density_.size();
     }
 
+    PhaseUsage PvtPropertiesBasic::phaseUsage() const
+    {
+        PhaseUsage pu;
+        pu.num_phases = numPhases();
+        if (pu.num_phases == 2) {
+            // Might just as well assume water-oil.
+            pu.phase_used[BlackoilPhases::Aqua] = true;
+            pu.phase_used[BlackoilPhases::Liquid] = true;
+            pu.phase_used[BlackoilPhases::Vapour] = false;
+            pu.phase_pos[BlackoilPhases::Aqua] = 0;
+            pu.phase_pos[BlackoilPhases::Liquid] = 1;
+            pu.phase_pos[BlackoilPhases::Vapour] = 1; // Unused.
+        } else {
+            ASSERT(pu.num_phases == 3);
+            pu.phase_used[BlackoilPhases::Aqua] = true;
+            pu.phase_used[BlackoilPhases::Liquid] = true;
+            pu.phase_used[BlackoilPhases::Vapour] = true;
+            pu.phase_pos[BlackoilPhases::Aqua] = 0;
+            pu.phase_pos[BlackoilPhases::Liquid] = 1;
+            pu.phase_pos[BlackoilPhases::Vapour] = 2;
+        }
+        return pu;
+    }
+
 
 
     void PvtPropertiesBasic::mu(const int n,

opm/core/props/pvt/PvtPropertiesBasic.hpp

@@ -21,6 +21,8 @@
 #define OPM_PVTPROPERTIESBASIC_HEADER_INCLUDED
 
 #include <opm/core/utility/parameters/ParameterGroup.hpp>
+#include <opm/core/props/BlackoilPhases.hpp>
+#include <vector>
 
 namespace Opm
 {
@@ -53,6 +55,9 @@ namespace Opm
         /// Number of active phases.
         int numPhases() const;
 
+        /// \return   Object describing the active phases.
+        PhaseUsage phaseUsage() const;
+
         /// Densities of stock components at surface conditions.
         /// \return  Array of size numPhases().
         const double* surfaceDensities() const;