[WIP] Implementation of eN transition model

Common/include/CConfig.hpp

@@ -848,6 +848,7 @@ class CConfig {
   Tke_FreeStream,                  /*!< \brief Total turbulent kinetic energy of the fluid.  */
   Intermittency_FreeStream,        /*!< \brief Freestream intermittency (for sagt transition model) of the fluid.  */
   TurbulenceIntensity_FreeStream,  /*!< \brief Freestream turbulent intensity (for sagt transition model) of the fluid.  */
+  AmplificationFactor_FreeStream,  /*!< \brief Freestream amplifictation factor for the eN 1 equation transition model.  */
   Turb2LamViscRatio_FreeStream,    /*!< \brief Ratio of turbulent to laminar viscosity. */
   NuFactor_FreeStream,             /*!< \brief Ratio of turbulent to laminar viscosity. */
   NuFactor_Engine,                 /*!< \brief Ratio of turbulent to laminar viscosity at the engine. */
@@ -1921,6 +1922,12 @@ class CConfig {
    */
   su2double GetIntermittency_FreeStream(void) const { return Intermittency_FreeStream; }
 
+  /*!
+   * \brief Get the value of the non-dimensionalized freestream amplification factor.
+   * \return Non-dimensionalized freestream amplification factor.
+   */
+  su2double GetAmplificationFactor_FreeStream(void) const { return AmplificationFactor_FreeStream; }
+
   /*!
    * \brief Get the value of the non-dimensionalized freestream turbulence intensity.
    * \return Non-dimensionalized freestream intensity.

Common/include/option_structure.hpp

@@ -1166,10 +1166,12 @@ 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). */
+  EN,	 /*!< \brief Kind of transition model using Amplification factor purely 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("EN", TURB_TRANS_MODEL::EN)
 };
 
 /*!

Common/src/CConfig.cpp

@@ -4724,7 +4724,11 @@ void CConfig::SetPostprocessing(SU2_COMPONENT val_software, unsigned short val_i
     SU2_MPI::Error("The LM transition model is under maintenance.", CURRENT_FUNCTION);
   }
 
-  if(Turb_Fixed_Values && !OptionIsSet("TURB_FIXED_VALUES_DOMAIN")){
+  if ((!saParsedOptions.ft2) && (Kind_Trans_Model == TURB_TRANS_MODEL::EN)) {
+	SU2_MPI::Error("eN transition model is only available with the SA-WITHFT2 turbulence model.", CURRENT_FUNCTION);
+  }
+
+  if (Turb_Fixed_Values && !OptionIsSet("TURB_FIXED_VALUES_DOMAIN")){
     SU2_MPI::Error("TURB_FIXED_VALUES activated, but no domain set with TURB_FIXED_VALUES_DOMAIN.", CURRENT_FUNCTION);
   }
 
@@ -6033,6 +6037,10 @@ void CConfig::SetOutput(SU2_COMPONENT val_software, unsigned short val_izone) {
             cout << "." << endl;
             break;
         }
+        switch (Kind_Trans_Model) {
+		  case TURB_TRANS_MODEL::NONE:  break;
+		  case TURB_TRANS_MODEL::EN:    cout << "Low-turbulence Transition model: eN 1 equation model (2014)" << endl; break;
+		}
         cout << "Hybrid RANS/LES: ";
         switch (Kind_HybridRANSLES) {
           case NO_HYBRIDRANSLES: cout << "No Hybrid RANS/LES" << endl; break;