Sch_CN_EX_iteratif.h

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#ifndef Sch_CN_EX_iteratif_included
#define Sch_CN_EX_iteratif_included
 
#include <Sch_CN_iteratif.h>
/*! @brief Extended iterative Crank-Nicolson scheme with additional stabilisation tricks.
 *
 *      Extends Sch_CN_iteratif to remain stable beyond its natural stability domain (facsec < 2).
 *
 *      An iteration damping factor omega is introduced. It improves stability but degrades solution quality:
 *      at low iteration counts, time derivatives are underestimated and conservation laws may not be satisfied.
 *
 *      To allow larger time steps, equations other than Navier-Stokes are solved by advancing n explicit
 *      Euler sub-steps. These n sub-steps are recomputed at each iteration of Sch_CN_iteratif.
 *
 *      This scheme is suited to large-scale industrial LES hydraulic simulations with solid-coupled thermics.
 *
 * @sa Sch_CN_iteratif
 */
class Sch_CN_EX_iteratif : public Sch_CN_iteratif
{
  Declare_instanciable(Sch_CN_EX_iteratif);
 
public :
 
  void set_param(Param& titi) const override;
  void mettre_a_jour_dt_stab() override;
 
protected :
 
  bool iterateTimeStepOnEquation(int i,bool& converged) override;
  virtual bool iterateTimeStepOnNS(int i,bool& converged);
  virtual bool iterateTimeStepOnOther(int i,bool& converged);
 
  double omega=0.1;
  void ajuster_facsec(type_convergence cv) override;
 
};
 
#endif