[WIP] Implementation of Amplification Factor Transport(AFT) 2019b tranistion model

Common/include/CConfig.hpp

@@ -610,6 +610,7 @@ class CConfig {
   TURB_SGS_MODEL Kind_SGS_Model;    /*!< \brief LES SGS model definition. */
   TURB_TRANS_MODEL Kind_Trans_Model;  /*!< \brief Transition model definition. */
   TURB_TRANS_CORRELATION Kind_Trans_Correlation;  /*!< \brief Transition correlation model definition. */
+  AFT_CORRELATION Kind_AFT_Correlation;  /*!< \brief Transition correlation of AFT model definition. */
   su2double hRoughness;             /*!< \brief RMS roughness for Transition model. */
   unsigned short Kind_ActDisk, Kind_Engine_Inflow,
   *Kind_Data_Riemann,
@@ -734,10 +735,12 @@ class CConfig {
   string *Config_Filenames;           /*!< \brief List of names for configuration files. */
   SST_OPTIONS *SST_Options;           /*!< \brief List of modifications/corrections/versions of SST turbulence model.*/
   SA_OPTIONS *SA_Options;             /*!< \brief List of modifications/corrections/versions of SA turbulence model.*/
-  LM_OPTIONS *LM_Options;             /*!< \brief List of modifications/corrections/versions of SA turbulence model.*/
+  LM_OPTIONS *LM_Options;             /*!< \brief List of modifications/corrections/versions of LM transition model.*/
+  AFT_OPTIONS *AFT_Options;           /*!< \brief List of modifications/corrections/versions of AFT transition model.*/
   unsigned short nSST_Options;        /*!< \brief Number of SST options specified. */
   unsigned short nSA_Options;         /*!< \brief Number of SA options specified. */
-  unsigned short nLM_Options;         /*!< \brief Number of SA options specified. */
+  unsigned short nLM_Options;         /*!< \brief Number of LM options specified. */
+  unsigned short nAFT_Options;        /*!< \brief Number of AFT options specified. */
   WALL_FUNCTIONS  *Kind_WallFunctions;        /*!< \brief The kind of wall function to use for the corresponding markers. */
   unsigned short  **IntInfo_WallFunctions;    /*!< \brief Additional integer information for the wall function markers. */
   su2double       **DoubleInfo_WallFunctions; /*!< \brief Additional double information for the wall function markers. */
@@ -886,6 +889,7 @@ class CConfig {
   Tke_FreeStream,                  /*!< \brief Total turbulent kinetic energy of the fluid.  */
   Intermittency_FreeStream,        /*!< \brief Freestream intermittency (for sagt transition model) of the fluid.  */
   ReThetaT_FreeStream,             /*!< \brief Freestream Transition Momentum Thickness Reynolds Number (for LM transition model) of the fluid.  */
+  N_Critcal,                       /*!< \brief Critical N-factor (for AFT model).  */
   NuFactor_FreeStream,             /*!< \brief Ratio of turbulent to laminar viscosity. */
   NuFactor_Engine,                 /*!< \brief Ratio of turbulent to laminar viscosity at the engine. */
   KFactor_LowerLimit,               /*!< \Non dimensional coefficient for lower limit of K in SST model. */
@@ -1182,6 +1186,7 @@ class CConfig {
   SST_ParsedOptions sstParsedOptions; /*!< \brief Additional parameters for the SST turbulence model. */
   SA_ParsedOptions saParsedOptions;   /*!< \brief Additional parameters for the SA turbulence model. */
   LM_ParsedOptions lmParsedOptions;   /*!< \brief Additional parameters for the LM transition model. */
+  AFT_ParsedOptions aftParsedOptions; /*!< \brief Additional parameters for the AFT transition model. */
   su2double uq_delta_b;         /*!< \brief Parameter used to perturb eigenvalues of Reynolds Stress Matrix */
   unsigned short eig_val_comp;  /*!< \brief Parameter used to determine type of eigenvalue perturbation */
   su2double uq_urlx;            /*!< \brief Under-relaxation factor */
@@ -2011,6 +2016,12 @@ class CConfig {
    */
   su2double GetReThetaT_FreeStream() const { return ReThetaT_FreeStream; }
 
+  /*!
+   * \brief Get the value of the critical N-factor.
+   * \return The critical N-factor.
+   */
+  su2double GetN_Critical(void) const { return N_Critcal; }
+
   /*!
    * \brief Get the value of the non-dimensionalized freestream turbulence intensity.
    * \return Non-dimensionalized freestream intensity.
@@ -2771,6 +2782,12 @@ class CConfig {
    */
   void SetReThetaT_FreeStream(su2double val_ReThetaT_freestream) { ReThetaT_FreeStream = val_ReThetaT_freestream; }
 
+  /*!
+   * \brief Set the freestream momentum thickness Reynolds number.
+   * \param[in] val_ReThetaT_freestream - Value of the freestream momentum thickness Reynolds number.
+   */
+  void SetN_Crtical(su2double val_N_critcal) { N_Critcal = val_N_critcal; }
+
   /*!
    * \brief Set the non-dimensional freestream energy.
    * \param[in] val_energy_freestreamnd - Value of the non-dimensional freestream energy.
@@ -9939,4 +9956,10 @@ class CConfig {
    */
   LM_ParsedOptions GetLMParsedOptions() const { return lmParsedOptions; }
 
+  /*!
+   * \brief Get parsed AFT option data structure.
+   * \return AFT option data structure.
+   */
+  AFT_ParsedOptions GetAFTParsedOptions() const { return aftParsedOptions; }
+
 };

Common/include/option_structure.hpp

@@ -1205,10 +1205,12 @@ inline SA_ParsedOptions ParseSAOptions(const SA_OPTIONS *SA_Options, unsigned sh
 enum class TURB_TRANS_MODEL {
   NONE,  /*!< \brief No transition model. */
   LM,    /*!< \brief Kind of transition model (Langtry-Menter (LM) for SST and Spalart-Allmaras). */
+  AFT,   /*!< \brief Kind of transition model (Amplification Factor Transport model for Spalart-Allmaras). */
 };
 static const MapType<std::string, TURB_TRANS_MODEL> Trans_Model_Map = {
   MakePair("NONE", TURB_TRANS_MODEL::NONE)
   MakePair("LM", TURB_TRANS_MODEL::LM)
+  MakePair("AFT", TURB_TRANS_MODEL::AFT)
 };
 
 /*!
@@ -1324,6 +1326,73 @@ inline LM_ParsedOptions ParseLMOptions(const LM_OPTIONS *LM_Options, unsigned sh
   return LMParsedOptions;
 }
 
+/*!
+ * \brief AFT Options
+ */
+enum class AFT_OPTIONS {
+  NONE,         /*!< \brief No option / default. */
+  AFT2017b,       /*!< \brief using AFT2017b model. */
+  AFT2019b       /*!< \brief using AFT2019b model. */
+};
+
+static const MapType<std::string, AFT_OPTIONS> AFT_Options_Map = {
+  MakePair("NONE", AFT_OPTIONS::NONE)
+  MakePair("AFT2017b", AFT_OPTIONS::AFT2017b)
+  MakePair("AFT2019b", AFT_OPTIONS::AFT2019b)
+};
+
+/*!
+ * \brief Types of transition correlations
+ */
+enum class AFT_CORRELATION {
+  NONE,         /*!< \brief No option / default. */
+  AFT2017b,      /*!< \brief Kind of transition correlation model (AFT2017b). */
+  AFT2019b      /*!< \brief Kind of transition correlation model (AFT2019b). */
+};
+
+/*!
+ * \brief Structure containing parsed AFT options.
+ */
+struct AFT_ParsedOptions {
+  AFT_OPTIONS version = AFT_OPTIONS::NONE;  /*!< \brief AFT base model. */
+  AFT_CORRELATION Correlation = AFT_CORRELATION::NONE;
+};
+
+/*!
+ * \brief Function to parse AFT options.
+ * \param[in] AFT_Options - Selected AFT option from config.
+ * \param[in] nAFT_Options - Number of options selected.
+ * \param[in] rank - MPI rank.
+ * \return Struct with AFT options.
+ */
+inline AFT_ParsedOptions ParseAFTOptions(const AFT_OPTIONS *AFT_Options, unsigned short nAFT_Options, int rank) {
+  AFT_ParsedOptions AFTParsedOptions;
+
+  auto IsPresent = [&](AFT_OPTIONS option) {
+    const auto aft_options_end = AFT_Options + nAFT_Options;
+    return std::find(AFT_Options, aft_options_end, option) != aft_options_end;
+  };
+
+  int NFoundCorrelations = 0;
+  if (IsPresent(AFT_OPTIONS::AFT2017b)) {
+    AFTParsedOptions.Correlation = AFT_CORRELATION::AFT2017b;
+    AFTParsedOptions.version = AFT_OPTIONS::AFT2017b;
+    NFoundCorrelations++;
+  }
+
+  if (IsPresent(AFT_OPTIONS::AFT2019b)) {
+    AFTParsedOptions.Correlation = AFT_CORRELATION::AFT2019b;
+    AFTParsedOptions.version = AFT_OPTIONS::AFT2019b;
+    NFoundCorrelations++;
+  }
+
+  if (NFoundCorrelations > 1) {
+    SU2_MPI::Error("Two correlations selected for AFT_OPTIONS. Please choose only one.", CURRENT_FUNCTION);
+  }
+
+  return AFTParsedOptions;
+}
+
 /*!
  * \brief types of species transport models
  */

Common/src/CConfig.cpp

@@ -1126,6 +1126,8 @@
   addEnumOption("KIND_TRANS_MODEL", Kind_Trans_Model, Trans_Model_Map, TURB_TRANS_MODEL::NONE);
   /*!\brief SST_OPTIONS \n DESCRIPTION: Specify LM transition model options/correlations. \n Options: see \link LM_Options_Map \endlink \n DEFAULT: NONE \ingroup Config*/
   addEnumListOption("LM_OPTIONS", nLM_Options, LM_Options, LM_Options_Map);
+  /*!\brief AFT_OPTIONS \n DESCRIPTION: Specify AFT transition model options/correlations. \n Options: see \link AFT_Options_Map \endlink \n DEFAULT: NONE \ingroup Config*/
+  addEnumListOption("AFT_OPTIONS", nAFT_Options, AFT_Options, AFT_Options_Map);
   /*!\brief HROUGHNESS \n DESCRIPTION: Value of RMS roughness for transition model \n DEFAULT: 1E-6 \ingroup Config*/
   addDoubleOption("HROUGHNESS", hRoughness, 1e-6);
 
@@ -1424,6 +1426,8 @@
   /* DESCRIPTION:  */
   addDoubleOption("FREESTREAM_TURBULENCEINTENSITY", TurbIntensityAndViscRatioFreeStream[0], 0.05);
   /* DESCRIPTION:  */
+  addDoubleOption("N_CRITICAL", N_Critcal, 0.0);
+  /* DESCRIPTION:  */
   addDoubleOption("FREESTREAM_NU_FACTOR", NuFactor_FreeStream, 3.0);
   /* DESCRIPTION:  */
   addDoubleOption("LOWER_LIMIT_K_FACTOR", KFactor_LowerLimit, 1.0e-15);
@@ -3532,6 +3536,8 @@
     if (lmParsedOptions.LM2015 && val_nDim == 2) {
       SU2_MPI::Error("LM2015 is available only for 3D problems", CURRENT_FUNCTION);
     }
+  } else if (Kind_Trans_Model == TURB_TRANS_MODEL::AFT) {
+    aftParsedOptions = ParseAFTOptions(AFT_Options, nAFT_Options, rank);
   }
 
   /*--- Set the boolean Wall_Functions equal to true if there is a
@@ -6321,6 +6327,10 @@
             }
             break;
           }
+          case TURB_TRANS_MODEL::AFT:{
+            cout << "Transition model: Amplification Factor Transport model";
+            break;
+          }
         }
         if (Kind_Trans_Model == TURB_TRANS_MODEL::LM) {
 
@@ -6342,6 +6352,26 @@
               break;
           }
         }
+        if (Kind_Trans_Model == TURB_TRANS_MODEL::AFT) {
+
+          switch (aftParsedOptions.Correlation) {
+            case AFT_CORRELATION::AFT2017b:
+              switch (Kind_Turb_Model) {
+                case TURB_MODEL::NONE: SU2_MPI::Error("No turbulence model has been selected but AFT transition model is active.", CURRENT_FUNCTION); break;
+                case TURB_MODEL::SST: SU2_MPI::Error("k-w SST turbulence model has been selected but AFT transition model is active.", CURRENT_FUNCTION); break;
+              }
+              cout << "-2017b" << endl;  break;
+              if(!saParsedOptions.ft2) SU2_MPI::Error("ft2 option of SA model has been not selected.", CURRENT_FUNCTION);
+            case AFT_CORRELATION::AFT2019b:
+              switch (Kind_Turb_Model) {
+                case TURB_MODEL::NONE: SU2_MPI::Error("No turbulence model has been selected but AFT transition model is active.", CURRENT_FUNCTION); break;
+                case TURB_MODEL::SST: SU2_MPI::Error("k-w SST turbulence model has been selected but AFT transition model is active.", CURRENT_FUNCTION); break;
+              }
+              cout << "-2019b" << endl;  break;
+              if(!saParsedOptions.ft2) SU2_MPI::Error("ft2 option of SA model has been not selected.", CURRENT_FUNCTION);
+            case AFT_CORRELATION::NONE: SU2_MPI::Error("NONE has been selected.", CURRENT_FUNCTION); break;
+          }
+        }
         cout << "Hybrid RANS/LES: ";
         switch (Kind_HybridRANSLES) {
           case NO_HYBRIDRANSLES: cout << "No Hybrid RANS/LES" << endl; break;

SU2_CFD/include/numerics/turbulent/transition/trans_convection.hpp

@@ -38,3 +38,10 @@
 template <class FlowIndices>
 using CUpwSca_TransLM  = CUpwSca_TurbSST<FlowIndices>;
 
+/*!
+ * \class CUpwSca_TransAFT
+ * \brief Re-use the SST convective fluxes for the scalar upwind discretization of AFT transition model equations.
+ * \ingroup ConvDiscr
+ */
+template <class FlowIndices>
+using CUpwSca_TransAFT  = CUpwSca_TurbSST<FlowIndices>;