[WIP] Feature fullmg

Common/include/option_structure.hpp

@@ -1126,6 +1126,8 @@ struct CMGOptions {
   su2double MG_Smooth_StagnationTol{0.0}; /*!< \brief Stagnation early exit: stop if current_rms >= prev_rms * tol. 0 = disabled. */
   bool MG_Implicit_Lines{false};          /*!< \brief Enable implicit-lines agglomeration from walls. */
   unsigned long MG_Implicit_Lines_MaxLength{20}; /*!< \brief Maximum nodes on a wall-normal implicit line (including wall seed). */
+  bool MG_Implicit_Lines_Isotropic{false}; /*!< \brief Use isotropic (vs anisotropic) agglomeration along implicit lines. */
+  unsigned long MG_Startup_Iter{100};     /*!< \brief Number of iterations on coarsest mesh during FMG startup phase. */
 };
 
 /*!

Common/src/CConfig.cpp

@@ -2069,6 +2069,10 @@ void CConfig::SetConfig_Options() {
   addBoolOption("MG_IMPLICIT_LINES", MGOptions.MG_Implicit_Lines, false);
   /*!\brief MG_IMPLICIT_LINES_MAX_LENGTH\n DESCRIPTION: Maximum number of nodes on a wall-normal implicit agglomeration line (including the wall seed node). DEFAULT: 20 \ingroup Config*/
   addUnsignedLongOption("MG_IMPLICIT_LINES_MAX_LENGTH", MGOptions.MG_Implicit_Lines_MaxLength, 20);
+  /*!\brief MG_IMPLICIT_LINES_ISOTROPIC\n DESCRIPTION: Use isotropic agglomeration along implicit lines (4 cells per coarse CV) instead of anisotropic (2 cells per coarse CV). DEFAULT: NO \ingroup Config*/
+  addBoolOption("MG_IMPLICIT_LINES_ISOTROPIC", MGOptions.MG_Implicit_Lines_Isotropic, false);
+  /*!\brief MG_STARTUP_ITER\n DESCRIPTION: Number of iterations on the coarsest mesh during Full Multigrid (FMG) startup phase before advancing to finer meshes. DEFAULT: 100 \ingroup Config*/
+  addUnsignedLongOption("MG_STARTUP_ITER", MGOptions.MG_Startup_Iter, 100);
   /*!\brief MG_CFL_SCALING\n DESCRIPTION: Per-level CFL scaling factors for coarse MG levels. Entry i is the ratio CFL(i+1)/CFL(i). If fewer values than nMGLevels are given, the last value is repeated. DEFAULT: 0.25 (i.e., 1/4 per level) \ingroup Config*/
   addDoubleListOption("MG_CFL_SCALING", nMG_CflScaling_p, MG_CflScaling_p);