Vitesse_derive_Spelt_Biesheuvel.h

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#ifndef Vitesse_derive_Spelt_Biesheuvel_included
#define Vitesse_derive_Spelt_Biesheuvel_included
 
#include <Vitesse_derive_base.h>
 
/*! @brief Spelt-Biesheuvel drift velocity for gas-liquid bubbly flow.
 *
 *         Computes a drift velocity using a Newton iteration on the
 *         interfacial friction balance, with optional turbulent diffusion
 *         following Spelt & Biesheuvel (1997).
 */
 
class Vitesse_derive_Spelt_Biesheuvel : public Vitesse_derive_base
{
  Declare_instanciable(Vitesse_derive_Spelt_Biesheuvel);
 
public:
  bool needs_grad_alpha() const override {return needs_grad_alpha_;};
  void completer() override;
 
protected:
  void evaluate_C0_vg0(const input_t& input) const override;
 
  bool needs_grad_alpha_ = false;
  const double Prt_ = 1.;
};
 
#endif