ChannelFlow.H

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#ifndef ChannelFlow_H
#define ChannelFlow_H
 
#include "amr-wind/core/Physics.H"
#include "amr-wind/core/Field.H"
#include "amr-wind/CFDSim.H"
#include "amr-wind/boundary_conditions/wall_models/WallFunction.H"
#include "amr-wind/turbulence/TurbulenceModel.H"
#include "AMReX_REAL.H"
 
using namespace amrex::literals;
 
namespace {
AMREX_GPU_DEVICE AMREX_FORCE_INLINE amrex::Real analytical_smagorinsky_profile(
    const amrex::Real h,
    const amrex::Real Cs,
    const amrex::Real dx,
    const amrex::Real rho,
    const amrex::Real mu,
    const amrex::Real dpdx,
    const amrex::Real C0,
    const amrex::Real C1)
{
    const amrex::Real Cs2 = Cs * Cs;
    const amrex::Real dx2 = dx * dx;
    const amrex::Real Cs2dx2 = Cs2 * dx2;
    return -mu / (rho * Cs2dx2) * h +
           Cs2dx2 / (3 * dpdx) *
               std::pow(
                   (2.0_rt / Cs2dx2 * dpdx * h +
                    (mu / (rho * Cs2dx2)) * (mu / (rho * Cs2dx2)) + C1),
                   3.0_rt / 2.0_rt) +
           C0;
}
 
} // namespace
 
namespace amr_wind::channel_flow {

class ChannelFlow : public Physics::Register<ChannelFlow>
{
public:
    static std::string identifier() { return "ChannelFlow"; }
 
    explicit ChannelFlow(CFDSim& sim);
 
    ~ChannelFlow() override = default;
 
    void initialize_fields(int level, const amrex::Geometry& geom) override;

    template <typename IndexSelector>
    void initialize_fields(
        int level,
        const amrex::Geometry& geom,
        const IndexSelector& idxOp,
        const int n_idx);
 
    template <typename IndexSelector>
    amrex::Real compute_error(const IndexSelector& idxOp);
 
    amrex::Real compute_analytical_smagorinsky_error();
 
    void output_error();
 
    void post_init_actions() override;
 
    void post_regrid_actions() override {}
 
    void pre_advance_work() override {}
 
    void post_advance_work() override;
 
private:
    CFDSim& m_sim;
 
    const amr_wind::SimTime& m_time;
    FieldRepo& m_repo;
    const amrex::AmrCore& m_mesh;
 
    WallFunction m_wall_func;

    int m_norm_dir{1};

    amrex::Real m_rho{1.0_rt};

    amrex::Real m_mu{1.0_rt};

    amrex::Real m_re_tau{1000.0_rt};

    amrex::Real m_utau{0.01_rt};

    amrex::Real m_ytau{0.001_rt};

    amrex::Real m_tke0{0.0_rt};

    amrex::Real m_sdr0{1000.0_rt};

    bool m_perturb_vel{false};

    amrex::Real m_perturb_y_period{1.0_rt};

    amrex::Real m_perturb_z_period{1.0_rt};

    amrex::Real m_perturb_fac{0.1_rt};

    amrex::Real m_kappa{0.41_rt};

    std::string m_turbulence_model;
 
    bool m_laminar{false};
 
    bool m_mesh_mapping{false};
 
    amrex::Real m_mean_vel;
 
    bool m_half{false};

    bool m_analytical_smagorinsky_test{false};

    amrex::Real m_C0{0.0_rt};

    amrex::Real m_C1{0.0_rt};

    amrex::Real m_dpdx{0.0_rt};

    int m_mean_vel_dir{0};

    const int m_w{18};

    std::string m_output_fname{"channel_flow.log"};
};
} // namespace amr_wind::channel_flow
 
#endif /* ChannelFlow_H */