Merge pull request #1559 from su2code/fix_saneg_variant_testcase

Improve the configuration file for the SA Neg test case

Author: suargi

TestCases/parallel_regression.py

@@ -685,8 +685,8 @@ def main():
     turbmod_sa_neg_rae2822           = TestCase('turbmod_sa_neg_rae2822')
     turbmod_sa_neg_rae2822.cfg_dir   = "turbulence_models/sa/rae2822"
     turbmod_sa_neg_rae2822.cfg_file  = "turb_SA_NEG_RAE2822.cfg"
-    turbmod_sa_neg_rae2822.test_iter = 20
-    turbmod_sa_neg_rae2822.test_vals = [-2.004689, 0.742306, 0.497308, -5.265793, 0.809463, 0.062016]
+    turbmod_sa_neg_rae2822.test_iter = 10
+    turbmod_sa_neg_rae2822.test_vals = [-1.094542, 3.161741, 2.333560, 2.864805, 1.494301, 0.530135]
     turbmod_sa_neg_rae2822.su2_exec  = "mpirun -n 2 SU2_CFD"
     turbmod_sa_neg_rae2822.timeout   = 1600
     turbmod_sa_neg_rae2822.new_output = True

TestCases/turbulence_models/sa/rae2822/turb_SA_NEG_RAE2822.cfg

@@ -1,3 +1,19 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%                                                                              %
+%                                  WARNING                                     %
+%                      This regression test will diverge!                      %
+%									       %
+% This test case is only meant to trigger the negative part of the SA model,   %
+% to check the integrity of the commits. It is inadvisable to use it as an     %
+% starting point for tutorials.						       %
+% The rae2822 airfoil is a simple (fast) case. A high angle of attack is being %
+% used in order to force the negative part of the SA in a reasonable amount of %
+% iterations. With the current configuration, e.g., convective scheme, CFL     %
+% number, etc, the solution is not stable and diverges after some iterations,  %
+% around 15. Therefore, this regression test shall only run for iter < 15.     %
+%                                                                              %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % ------------- DIRECT, ADJOINT, AND LINEARIZED PROBLEM DEFINITION ------------%
 %
 % Physical governing equations                    
@@ -14,7 +30,7 @@ RESTART_SOL= NO
 MACH_NUMBER= 0.729
 %
 % Angle of attack (degrees, only for compressible flows)
-AOA= 2.31
+AOA= 20.31
 %
 % Free-stream temperature (288.15 K by default)
 FREESTREAM_TEMPERATURE= 288.15
@@ -61,7 +77,11 @@ NUM_METHOD_GRAD= WEIGHTED_LEAST_SQUARES
 CFL_NUMBER= 2.5
 %
 % Adaptive CFL number (NO, YES)
-CFL_ADAPT= NO
+CFL_ADAPT= YES
+%
+% Parameters of the adaptive CFL number ( factor down, factor up, CFL min value,
+%                                        CFL max value )
+CFL_ADAPT_PARAM= ( 0.5, 1.5, 400.0, 1000.0 )
 %
 % Number of total iterations
 ITER= 99999
@@ -78,7 +98,7 @@ LINEAR_SOLVER_ITER= 20
 % -------------------------- MULTIGRID PARAMETERS -----------------------------%
 %
 % Multi-Grid Levels (0 = no multi-grid)
-MGLEVEL= 3
+MGLEVEL= 0
 %
 % Multi-grid cycle (V_CYCLE, W_CYCLE, FULLMG_CYCLE)
 MGCYCLE= W_CYCLE