Added missing safety factor paramet for time step controller

opm/simulators/timestepping/AdaptiveTimeStepping.cpp

@@ -136,6 +136,9 @@ void registerAdaptiveParameters()
     Parameters::Register<Parameters::MinTimeStepBasedOnNewtonIterations>
         ("The minimum time step size (in days for field and metric unit and hours for lab unit) "
          "can be reduced to based on newton iteration counts");
+    Parameters::Register<Parameters::TimeStepControlSafetyFactor>
+        ("Value to be multiplied with the time step control tolerance to ensure that the target "
+         "relative change is lower than the tolerance");
 }
 
 std::tuple<TimeStepControlType, std::unique_ptr<TimeStepControlInterface>, bool>
@@ -214,9 +217,11 @@ createController(const UnitSystem& unitSystem)
          }},
         {"general3rdorder",
          [tol]() {
+             const double safetyFactor = Parameters::Get<Parameters::TimeStepControlSafetyFactor>(); // 0.8
              return RetVal{
                  TimeStepControlType::General3rdOrder,
-                 std::make_unique<General3rdOrderController>(tol),
+                 std::make_unique<General3rdOrderController>(tol,
+                                                             safetyFactor),
                  false
              };
         }},

opm/simulators/timestepping/AdaptiveTimeStepping.hpp

@@ -57,6 +57,7 @@ struct TimeStepControlGrowthDampingFactor { static constexpr double value = 3.2;
 struct TimeStepControlFileName { static constexpr auto value = "timesteps"; };
 struct MinTimeStepBeforeShuttingProblematicWellsInDays { static constexpr double value = 0.01; };
 struct MinTimeStepBasedOnNewtonIterations { static constexpr double value = 0.0; };
+struct TimeStepControlSafetyFactor { static constexpr double value = 0.8; };
 
 } // namespace Opm::Parameters