DragForcing.H

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#ifndef DRAGFORCING_H
#define DRAGFORCING_H
 
#include "amr-wind/equation_systems/icns/MomentumSource.H"
#include "amr-wind/core/SimTime.H"
#include "amr-wind/CFDSim.H"
#include "amr-wind/utilities/constants.H"
 
namespace amr_wind::pde::icns {

class DragForcing : public MomentumSource::Register<DragForcing>
{
public:
    static std::string identifier() { return "DragForcing"; }
 
    explicit DragForcing(const CFDSim& sim);
 
    ~DragForcing() override;
 
    void operator()(
        const int lev,
        const amrex::MFIter& mfi,
        const amrex::Box& bx,
        const FieldState fstate,
        const amrex::Array4<amrex::Real>& src_term) const override;
 
private:
    const SimTime& m_time;
    const CFDSim& m_sim;
    const amrex::AmrCore& m_mesh;
    const Field& m_velocity;
    const Field* m_target_vel{nullptr};
    const Field* m_target_levelset{nullptr};
    amrex::Gpu::DeviceVector<amrex::Real> m_device_vel_ht;
    amrex::Gpu::DeviceVector<amrex::Real> m_device_vel_vals;
    amrex::Real m_drag_coefficient{10.0};
    amrex::Real m_sponge_strength{1.0};
    amrex::Real m_sponge_density{1.0};
    amrex::Real m_sponge_distance_west{-1000};
    amrex::Real m_sponge_distance_east{1000};
    amrex::Real m_sponge_distance_south{-1000};
    amrex::Real m_sponge_distance_north{1000};
    int m_sponge_west{0};
    int m_sponge_east{1};
    int m_sponge_south{0};
    int m_sponge_north{1};
    bool m_is_laminar{false};
    bool m_terrain_is_waves{false};
    bool m_apply_MOSD{false};
    std::string m_wall_het_model{"none"};
    amrex::Real m_monin_obukhov_length{constants::LARGE_NUM};
    amrex::Real m_kappa{0.41};
    amrex::Real m_gamma_m{5.0};
    amrex::Real m_beta_m{16.0};
};
 
} // namespace amr_wind::pde::icns
 
#endif