Add Iter and Residual output for turbulence linear solver.

Note though that we can get the output but ITER and ERROR are controlled
by the same config options as for the mean flow.

Author: TobiKattmann

SU2_CFD/src/output/CFlowIncOutput.cpp

@@ -214,6 +214,10 @@ void CFlowIncOutput::SetHistoryOutputFields(CConfig *config){
   /// DESCRIPTION: Linear solver iterations
   AddHistoryOutput("LINSOL_ITER", "LinSolIter", ScreenOutputFormat::INTEGER, "LINSOL", "Number of iterations of the linear solver.");
   AddHistoryOutput("LINSOL_RESIDUAL", "LinSolRes", ScreenOutputFormat::FIXED, "LINSOL", "Residual of the linear solver.");
+  if (turb_model) {
+    AddHistoryOutput("LINSOL_ITER_TURB", "LinSolIterTurb", ScreenOutputFormat::INTEGER, "LINSOL", "Number of iterations of the linear solver for turbulence solver.");
+    AddHistoryOutput("LINSOL_RESIDUAL_TURB", "LinSolResTurb", ScreenOutputFormat::FIXED, "LINSOL", "Residual of the linear solver for turbulence solver.");
+  }
 
   AddHistoryOutput("MIN_DELTA_TIME", "Min DT", ScreenOutputFormat::SCIENTIFIC, "CFL_NUMBER", "Current minimum local time step");
   AddHistoryOutput("MAX_DELTA_TIME", "Max DT", ScreenOutputFormat::SCIENTIFIC, "CFL_NUMBER", "Current maximum local time step");
@@ -333,6 +337,10 @@ void CFlowIncOutput::LoadHistoryData(CConfig *config, CGeometry *geometry, CSolv
 
   SetHistoryOutputValue("LINSOL_ITER", flow_solver->GetIterLinSolver());
   SetHistoryOutputValue("LINSOL_RESIDUAL", log10(flow_solver->GetResLinSolver()));
+  if (turb_model) {
+    SetHistoryOutputValue("LINSOL_ITER_TURB", turb_solver->GetIterLinSolver());
+    SetHistoryOutputValue("LINSOL_RESIDUAL_TURB", log10(turb_solver->GetResLinSolver()));
+  }
 
   if (config->GetDeform_Mesh()){
     SetHistoryOutputValue("DEFORM_MIN_VOLUME", mesh_solver->GetMinimum_Volume());