TurbModelBase.H

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#ifndef TURBMODELBASE_H
#define TURBMODELBASE_H
 
#include "amr-wind/turbulence/TurbModel.H"
#include "amr-wind/utilities/IOManager.H"
#include "amr-wind/core/field_ops.H"
#include "AMReX_REAL.H"
 
using namespace amrex::literals;
 
namespace amr_wind::turbulence {
 
namespace turb_base_impl {
 
// For transport model with constant properties implement specializations that
// avoid creation of an intermediate scratch buffer.
 
template <typename Transport>
void visc_update(Field& evisc, Field& tvisc, Transport& transport)
    requires Transport::constant_properties
{
    evisc.setVal(transport.viscosity());
    field_ops::saxpy(
        evisc, 1.0_rt, tvisc, 0, 0, evisc.num_comp(), evisc.num_grow());
}
 
template <typename Transport>
void alpha_update(Field& evisc, Field& tvisc, Transport& transport)
    requires Transport::constant_properties
{
    evisc.setVal(transport.thermal_diffusivity());
    field_ops::saxpy(
        evisc, 1.0_rt / transport.turbulent_prandtl(), tvisc, 0, 0,
        evisc.num_comp(), evisc.num_grow());
}
 
template <typename Transport>
void scal_diff_update(
    Field& evisc, Field& tvisc, Transport& transport, const std::string& name)
    requires Transport::constant_properties
{
    evisc.setVal(transport.viscosity() / transport.laminar_schmidt(name));
    field_ops::saxpy(
        evisc, 1.0_rt / transport.turbulent_schmidt(name), tvisc, 0, 0,
        evisc.num_comp(), evisc.num_grow());
}
 
template <typename Transport>
void visc_update(Field& evisc, Field& tvisc, Transport& transport)
    requires(!Transport::constant_properties)
{
    auto lam_mu = transport.mu();
    field_ops::lincomb(
        evisc, 1.0_rt, *lam_mu, 0, 1.0_rt, tvisc, 0, 0, evisc.num_comp(),
        evisc.num_grow());
}
 
template <typename Transport>
void alpha_update(Field& evisc, Field& tvisc, Transport& transport)
    requires(!Transport::constant_properties)
{
    auto lam_alpha = transport.alpha();
    field_ops::lincomb(
        evisc, 1.0_rt, *lam_alpha, 0, 1.0_rt / transport.turbulent_prandtl(),
        tvisc, 0, 0, evisc.num_comp(), evisc.num_grow());
}
 
template <typename Transport>
void scal_diff_update(
    Field& evisc, Field& tvisc, Transport& transport, const std::string& name)
    requires(!Transport::constant_properties)
{
    auto lam_mu = transport.mu();
    field_ops::lincomb(
        evisc, 1.0_rt / transport.laminar_schmidt(name), *lam_mu, 0,
        1.0_rt / transport.turbulent_schmidt(name), tvisc, 0, 0,
        evisc.num_comp(), evisc.num_grow());
}
 
} // namespace turb_base_impl

template <typename Transport>
class TurbModelBase : public TurbModel<Transport>
{
public:
    explicit TurbModelBase(CFDSim& sim)
        : TurbModel<Transport>(sim)
        , m_mu_turb(sim.repo().declare_field("mu_turb", 1, 1, 1))
    {
        this->m_sim.io_manager().register_io_var("mu_turb");
 
        // Effective viscosity field for output
        auto& fields = this->m_sim.pde_manager().icns().fields();
        this->m_sim.io_manager().register_io_var(fields.mueff.name());
 
        // Effective diffusive parameter fields for scalars
        for (auto& sc_eqn : this->m_sim.pde_manager().scalar_eqns()) {
            this->m_sim.io_manager().register_output_var(
                sc_eqn->fields().mueff.name());
        }
 
        m_mu_turb.set_default_fillpatch_bc(this->m_sim.time());
    }

    Field& mu_turb() override { return m_mu_turb; }

    Field& alpha_turb() override
    {
        AMREX_ASSERT(m_alpha_turb != nullptr);
        return *m_alpha_turb;
    }
 
    // clang-format off

    void update_mueff(Field& mueff) override
    {
        turb_base_impl::visc_update(mueff, this->m_mu_turb, this->m_transport);
    }

    void update_alphaeff(Field& alphaeff) override
    {
        turb_base_impl::alpha_update(alphaeff, this->m_mu_turb, this->m_transport);
    }

    void update_scalar_diff(Field& deff, const std::string& name) override
    {
        turb_base_impl::scal_diff_update(deff, this->m_mu_turb, this->m_transport, name);
    }
 
    // clang-format on
 
protected:
    Field& m_mu_turb;

    Field* m_alpha_turb{nullptr};
};
 
} // namespace amr_wind::turbulence
 
#endif /* TURBMODELBASE_H */