ERF_TurbStruct.H

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#ifndef ERF_TURB_STRUCT_H_
#define ERF_TURB_STRUCT_H_
 
#include <ERF_MYNNStruct.H>
 
AMREX_ENUM(LESType, None, Smagorinsky, Deardorff);
 
AMREX_ENUM(RANSType, None, kEqn);
 
AMREX_ENUM(PBLType, None, MYNN25, YSU);
 
template <typename T>
void query_one_or_per_level(const amrex::ParmParse& pp, const char* query_string, T& query_var, const int lev, const int maxlev)
{
    int count = pp.countval(query_string);
    if (count == 0) {
        return; // nothing to do
    } else if (count == 1) {
        pp.query(query_string, query_var);
    } else if (count == maxlev + 1) {
        pp.query(query_string, query_var, lev);
    } else {
        amrex::Error("For parmparse variable " + pp.prefixedName(query_string)
                     + ": if specified, specify once total or once for each level");
    }
}
 
/**
 * Container holding quantities related to turbulence parametrizations
 */
struct TurbChoice {
  public:
    void init_params(int lev, int max_level)
    {
        amrex::ParmParse pp(pp_prefix);
 
        // Which LES closure?
        std::string les_type_string = "None";
        query_one_or_per_level(pp, "les_type", les_type, lev, max_level);
 
        // Which RANS closure?
        std::string rans_type_string = "None";
        query_one_or_per_level(pp, "rans_type", rans_type, lev, max_level);
 
        if ((rans_type != RANSType::None) && (les_type != LESType::None)) {
            amrex::Error("Hybrid RANS-LES not implemented");
        }
 
        // Which PBL Closure
        static std::string pbl_type_string = "None";
        query_one_or_per_level(pp, "pbl_type", pbl_type, lev, max_level);
 
        // Do some more stuff for PBL Modeling
        if (pbl_type != PBLType::None) {
            // Check for compatibility between PBL, LES, Molec Transport
            if (les_type != LESType::None) {
                amrex::Print() << "Selected a PBL model and an LES model: " <<
                    "Using PBL for vertical transport, LES for horizontal" << std::endl;
            } else if (les_type == LESType::Deardorff) {
                amrex::Error("It is not recommended to use Deardorff LES and a PBL model");
            }
 
            if (pbl_type == PBLType::MYNN25) {
                query_one_or_per_level(pp, "pbl_mynn_A1", pbl_mynn.A1, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_A2", pbl_mynn.A2, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_B1", pbl_mynn.B1, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_B2", pbl_mynn.B2, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_C1", pbl_mynn.C1, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_C2", pbl_mynn.C2, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_C3", pbl_mynn.C3, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_C4", pbl_mynn.C4, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_C5", pbl_mynn.C5, lev, max_level);
                pbl_mynn_level2.init_coeffs(pbl_mynn.A1, pbl_mynn.A2, pbl_mynn.B1, pbl_mynn.B2,
                                            pbl_mynn.C1, pbl_mynn.C2, pbl_mynn.C3, pbl_mynn.C4, pbl_mynn.C5);
                query_one_or_per_level(pp, "pbl_mynn_diffuse_moistvars", pbl_mynn.diffuse_moistvars, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_SMmin", pbl_mynn.SMmin, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_SMmax", pbl_mynn.SMmax, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_SHmin", pbl_mynn.SHmin, lev, max_level);
                query_one_or_per_level(pp, "pbl_mynn_SHmax", pbl_mynn.SHmax, lev, max_level);
            } else if (pbl_type == PBLType::YSU) {
                query_one_or_per_level(pp, "pbl_ysu_coriolis_freq", pbl_ysu_coriolis_freq, lev, max_level);
                query_one_or_per_level(pp, "pbl_ysu_use_consistent_coriolis", pbl_ysu_use_consistent_coriolis, lev, max_level);
                query_one_or_per_level(pp, "pbl_ysu_force_over_water", pbl_ysu_force_over_water, lev, max_level);
                query_one_or_per_level(pp, "pbl_ysu_land_Ribcr", pbl_ysu_land_Ribcr, lev, max_level);
                query_one_or_per_level(pp, "pbl_ysu_unst_Ribcr", pbl_ysu_unst_Ribcr, lev, max_level);
            }
        }
 
        // Right now, solving the QKE equation is only supported when MYNN PBL is turned on
        if (pbl_type == PBLType::MYNN25) {
            use_KE = true;
            query_one_or_per_level(pp, "advect_KE"    , advect_KE, lev, max_level);
            query_one_or_per_level(pp, "diffuse_KE_3D", diffuse_KE_3D, lev, max_level);
        }
 
        // LES constants...
        query_one_or_per_level(pp, "Cs"  ,Cs, lev, max_level);
        query_one_or_per_level(pp, "Pr_t",Pr_t, lev, max_level);
        query_one_or_per_level(pp, "Sc_t",Sc_t, lev, max_level);
 
        // Compute relevant forms of diffusion parameters
        Pr_t_inv = amrex::Real(1.0) / Pr_t;
        Sc_t_inv = amrex::Real(1.0) / Sc_t;
 
        query_one_or_per_level(pp, "Ce"      , Ce, lev, max_level);
        query_one_or_per_level(pp, "Ce_wall" , Ce_wall, lev, max_level);
 
        if (les_type == LESType::Deardorff) {
            query_one_or_per_level(pp, "Ck" , Ck, lev, max_level);
        }
 
        // k-eqn constants
        query_one_or_per_level(pp, "Cmu0"           , Cmu0   , lev, max_level);
        query_one_or_per_level(pp, "Cb"             , Cb     , lev, max_level);
        query_one_or_per_level(pp, "Rt_crit"        , Rt_crit, lev, max_level);
        query_one_or_per_level(pp, "Rt_min"         , Rt_min , lev, max_level);
        query_one_or_per_level(pp, "max_geom_lscale", l_g_max, lev, max_level);
 
        // Common inputs (LES or RANS)
        query_one_or_per_level(pp, "sigma_k" , sigma_k, lev, max_level);
        query_one_or_per_level(pp, "theta_ref", theta_ref, lev, max_level);
 
        // Validate inputs
        if (les_type == LESType::Smagorinsky) {
            if (Cs == 0) {
                amrex::Error("Need to specify Cs for Smagorsinky LES");
            }
        }
    }
 
    void display(int lev)
    {
        amrex::Print() << "Turbulence Settings at level " << lev << std::endl;
 
        if (les_type == LESType::None && rans_type == RANSType::None && pbl_type == PBLType::None) {
            amrex::Print() << "    Using DNS model at level " << lev << std::endl;
        } else if  (les_type == LESType::Smagorinsky) {
            amrex::Print() << "    Using Smagorinsky LES model at level " << lev << std::endl;
        } else if  (les_type == LESType::Deardorff) {
            amrex::Print() << "    Using Deardorff LES model at level " << lev << std::endl;
        } else if  (rans_type == RANSType::kEqn) {
            amrex::Print() << "    Using Axell & Liungman one-equation RANS k model at level " << lev << std::endl;
        } else if  (pbl_type == PBLType::MYNN25) {
            amrex::Print() << "    Using MYNN2.5 PBL model at level " << lev << std::endl;
        } else if  (pbl_type == PBLType::YSU) {
            amrex::Print() << "    Using YSU PBL model at level " << lev << std::endl;
        }
 
        if (les_type != LESType::None) {
            if (les_type == LESType::Smagorinsky) {
                amrex::Print() << "Cs                          : " << Cs << std::endl;
            }
            if (les_type == LESType::Deardorff) {
                amrex::Print() << "Ce                          : " << Ce << std::endl;
                amrex::Print() << "Ce at wall                  : " << Ce_wall << std::endl;
                amrex::Print() << "Ck                          : " << Ck << std::endl;
                amrex::Print() << "sigma_k                     : " << sigma_k << std::endl;
                amrex::Print() << "reference theta             : " << theta_ref << std::endl;
                // Sullivan et al 1994, Eqn 14
                amrex::Real Cs_equiv = std::sqrt(Ck * std::sqrt(Ck/Ce));
                amrex::Print() << "equivalent Cs               : " << Cs_equiv << std::endl;
            }
        }
 
        if (rans_type != RANSType::None) {
            if (rans_type == RANSType::kEqn) {
                amrex::Print() << "Cmu0                        : " << Cmu0 << std::endl;
                amrex::Print() << "sigma_k                     : " << sigma_k << std::endl;
                amrex::Print() << "Cb                          : " << Cb << std::endl;
                amrex::Print() << "Rt_crit                     : " << Rt_crit << std::endl;
                amrex::Print() << "Rt_min                      : " << Rt_min << std::endl;
                amrex::Print() << "max_geom_lscale             : " << l_g_max << std::endl;
                amrex::Print() << "reference theta             : " << theta_ref << std::endl;
            }
        }
 
        if ((les_type != LESType::None) || (rans_type != RANSType::None)) {
            amrex::Print() << "Pr_t                        : " << Pr_t << std::endl;
            amrex::Print() << "Sc_t                        : " << Sc_t << std::endl;
        }
 
        if (pbl_type == PBLType::MYNN25) {
            amrex::Print() << "    pbl_mynn_A1 : " << pbl_mynn.A1 << std::endl;
            amrex::Print() << "    pbl_mynn_A2 : " << pbl_mynn.A2 << std::endl;
            amrex::Print() << "    pbl_mynn_B1 : " << pbl_mynn.B1 << std::endl;
            amrex::Print() << "    pbl_mynn_B2 : " << pbl_mynn.B2 << std::endl;
            amrex::Print() << "    pbl_mynn_C1 : " << pbl_mynn.C1 << std::endl;
            amrex::Print() << "    pbl_mynn_C2 : " << pbl_mynn.C2 << std::endl;
            amrex::Print() << "    pbl_mynn_C3 : " << pbl_mynn.C3 << std::endl;
            amrex::Print() << "    pbl_mynn_C4 : " << pbl_mynn.C4 << std::endl;
            amrex::Print() << "    pbl_mynn_C5 : " << pbl_mynn.C5 << std::endl;
        } else if (pbl_type == PBLType::YSU) {
            amrex::Print() << "    pbl_ysu_coriolis_freq           : " << pbl_ysu_coriolis_freq << std::endl;
            amrex::Print() << "    pbl_ysu_use_consistent_coriolis : " << pbl_ysu_use_consistent_coriolis << std::endl;
            amrex::Print() << "    pbl_ysu_force_over_water        : " << pbl_ysu_force_over_water << std::endl;
            amrex::Print() << "    pbl_ysu_land_Ribcr              : " << pbl_ysu_land_Ribcr << std::endl;
            amrex::Print() << "    pbl_ysu_unst_Ribcr              : " << pbl_ysu_unst_Ribcr << std::endl;
        }
    }
 
    // Default prefix
    std::string pp_prefix {"erf"};
 
    // LES model
    LESType les_type;
 
    // Turbulent Prandtl number
    amrex::Real Pr_t = amrex::Real(1.0) / amrex::Real(3.0);
    amrex::Real Pr_t_inv = amrex::Real(3.0);
 
    // Turbulent Schmidt number
    amrex::Real Sc_t = 1.0;
    amrex::Real Sc_t_inv = 1.0;
 
    // Smagorinsky Cs coefficient
    amrex::Real Cs = 0.0;
 
    // Deardorff
    amrex::Real Ce = 0.93;
    amrex::Real Ce_wall = 0.0; // if > 0, then set Ce to this at k=0
    amrex::Real Ck = 0.1;
 
    // k-eqn RANS coefficients (Axell & Liungman 2001)
    amrex::Real Cmu0 = 0.5562;
    amrex::Real Cb = 0.35;
    amrex::Real Rt_crit = -1.0;
    amrex::Real Rt_min = -3.0;
    amrex::Real l_g_max = 1e99;
 
    // Deardorff or k-eqn RANS
    // - diffusivity of tke is 1/sigma_k times the eddy viscosity
    amrex::Real sigma_k = 0.5;
    // - reference potential temperature used to quantify the stratification in
    //   a stable region
    amrex::Real theta_ref = 300.0;
 
    // RANS type
    RANSType rans_type;
 
    // PBL model
    PBLType pbl_type;
 
    MYNNLevel25 pbl_mynn;
    MYNNLevel2 pbl_mynn_level2; // for filtering
 
    // Model coefficients - YSU
    // TODO: Add parmparse for all of these above
    amrex::Real pbl_ysu_coriolis_freq = 1.0e-4; // 1e-4 is hardcoded in WRF, we let the user specify or tske the value from ERF coriolis forcing
    bool        pbl_ysu_use_consistent_coriolis = false; // ignore input pbl_ysu_coriolis_freq, take value from ERF coriolis forcing instead
    bool        pbl_ysu_force_over_water = false; // Force YSU to act as if it is over water regardless of other inputs (for testing)
    amrex::Real pbl_ysu_land_Ribcr = 0.25; // Critical Bulk Richardson number of Land for stable conditions
    amrex::Real pbl_ysu_unst_Ribcr = 0.0;  // Critical Bulk Richardson number for unstable conditions
 
    // QKE stuff - default is to use it, if MYNN2.5 PBL is used default is turb transport in Z-direction only
    bool use_KE = true;
    bool diffuse_KE_3D = true;
    bool advect_KE = true;
};
#endif