ERF
Energy Research and Forecasting: An Atmospheric Modeling Code
adiabatic_charnock Struct Reference

#include <ERF_MOSTStress.H>

Collaboration diagram for adiabatic_charnock:

Public Member Functions

 adiabatic_charnock (amrex::Real zref, amrex::Real Tflux, amrex::Real Qvflux, amrex::Real cnk_a, bool cnk_visc)
 
AMREX_GPU_DEVICE AMREX_FORCE_INLINE void iterate_flux (const int &i, const int &j, const int &k, const int &max_iters, const amrex::Array4< amrex::Real > &z0_arr, const amrex::Array4< const amrex::Real > &umm_arr, const amrex::Array4< const amrex::Real > &tm_arr, const amrex::Array4< const amrex::Real > &, const amrex::Array4< const amrex::Real > &, const amrex::Array4< amrex::Real > &u_star_arr, const amrex::Array4< amrex::Real > &, const amrex::Array4< amrex::Real > &t_star_arr, const amrex::Array4< amrex::Real > &q_star_arr, const amrex::Array4< amrex::Real > &, const amrex::Array4< amrex::Real > &, const amrex::Array4< amrex::Real > &olen_arr, const amrex::Array4< amrex::Real > &, const amrex::Array4< amrex::Real > &, const amrex::Array4< amrex::Real > &, const amrex::Array4< amrex::Real > &) const
 

Private Attributes

most_data mdata
 
similarity_funs sfuns
 
const amrex::Real tol_z = 1.0e-10
 
const amrex::Real WSMIN = 0.1
 

Detailed Description

Adiabatic with charnock roughness

Constructor & Destructor Documentation

◆ adiabatic_charnock()

adiabatic_charnock::adiabatic_charnock ( amrex::Real  zref,
amrex::Real  Tflux,
amrex::Real  Qvflux,
amrex::Real  cnk_a,
bool  cnk_visc 
)
inline
193  {
194  mdata.zref = zref;
195  mdata.surf_temp_flux = Tflux;
196  mdata.surf_moist_flux = Qvflux;
197  mdata.Cnk_a = cnk_a;
198  mdata.visc = cnk_visc;
199  }
most_data mdata
Definition: ERF_MOSTStress.H:265
amrex::Real surf_moist_flux
Moisture flux.
Definition: ERF_MOSTStress.H:20
amrex::Real zref
Reference height (m)
Definition: ERF_MOSTStress.H:15
amrex::Real Cnk_a
Standard Charnock constant https://doi.org/10.1175/JAMC-D-17-0137.1.
Definition: ERF_MOSTStress.H:22
bool visc
Use viscous Charnock formulation.
Definition: ERF_MOSTStress.H:27
amrex::Real surf_temp_flux
Heat flux.
Definition: ERF_MOSTStress.H:19

Member Function Documentation

◆ iterate_flux()

AMREX_GPU_DEVICE AMREX_FORCE_INLINE void adiabatic_charnock::iterate_flux ( const int &  i,
const int &  j,
const int &  k,
const int &  max_iters,
const amrex::Array4< amrex::Real > &  z0_arr,
const amrex::Array4< const amrex::Real > &  umm_arr,
const amrex::Array4< const amrex::Real > &  tm_arr,
const amrex::Array4< const amrex::Real > &  ,
const amrex::Array4< const amrex::Real > &  ,
const amrex::Array4< amrex::Real > &  u_star_arr,
const amrex::Array4< amrex::Real > &  ,
const amrex::Array4< amrex::Real > &  t_star_arr,
const amrex::Array4< amrex::Real > &  q_star_arr,
const amrex::Array4< amrex::Real > &  ,
const amrex::Array4< amrex::Real > &  ,
const amrex::Array4< amrex::Real > &  olen_arr,
const amrex::Array4< amrex::Real > &  ,
const amrex::Array4< amrex::Real > &  ,
const amrex::Array4< amrex::Real > &  ,
const amrex::Array4< amrex::Real > &   
) const
inline
224  {
225  amrex::Real ustar = 0.0;
226  amrex::Real z0 = z0_arr(i,j,k);
227  amrex::Real z0_old = z0;
228  amrex::Real psi_m = 0.0;
229  amrex::Real umm = std::max(umm_arr(i,j,k), WSMIN);
230  amrex::Real C = std::log(mdata.zref / z0);
231 
232  // Fixed point iteration on roughness
233  int iter_z = 0;
234  do {
235  // Transfer curr to old
236  z0_old = z0;
237 
238  // Update
239  C = std::log(mdata.zref / z0_old);
240  ustar = mdata.kappa * umm / (C - psi_m);
241  if (mdata.Cnk_a > 0) {
242  z0 = (mdata.Cnk_a / mdata.gravity) * ustar * ustar;
243  if (mdata.visc) {
244  z0 += air_viscosity(tm_arr(i,j,k)) / std::max(ustar, 0.05);
245  }
246  } else {
247  z0 = COARE3_roughness(mdata.zref, umm, ustar);
248  }
249 
250  ++iter_z;
251  } while ( (std::abs(z0 - z0_old) > tol_z) && (iter_z <= max_iters) );
252  AMREX_ALWAYS_ASSERT_WITH_MESSAGE(iter_z < max_iters,
253  "Maximum number of MOST roughness iterations reached.");
254  C = std::log(mdata.zref / z0);
255 
256  // Populate the stored MOST arrays
257  z0_arr(i,j,k) = z0;
258  olen_arr(i,j,k) = 1.0e16;
259  u_star_arr(i,j,k) = mdata.kappa * umm / (C - psi_m);
260  t_star_arr(i,j,k) = 0.0;
261  q_star_arr(i,j,k) = 0.0;
262  }
AMREX_GPU_DEVICE AMREX_FORCE_INLINE amrex::Real COARE3_roughness(amrex::Real zref, amrex::Real umm, amrex::Real ustar)
Definition: ERF_MOSTRoughness.H:9
AMREX_GPU_DEVICE AMREX_FORCE_INLINE amrex::Real air_viscosity(amrex::Real T_degK)
Definition: ERF_MOSTStress.H:126
amrex::Real Real
Definition: ERF_ShocInterface.H:16
const amrex::Real WSMIN
Definition: ERF_MOSTStress.H:268
const amrex::Real tol_z
Definition: ERF_MOSTStress.H:267
amrex::Real kappa
von Karman constant
Definition: ERF_MOSTStress.H:17
amrex::Real gravity
Acceleration due to gravity (m/s^2)
Definition: ERF_MOSTStress.H:18
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Member Data Documentation

◆ mdata

most_data adiabatic_charnock::mdata
private

Referenced by adiabatic_charnock(), and iterate_flux().

◆ sfuns

similarity_funs adiabatic_charnock::sfuns
private

◆ tol_z

const amrex::Real adiabatic_charnock::tol_z = 1.0e-10
private

Referenced by iterate_flux().

◆ WSMIN

const amrex::Real adiabatic_charnock::WSMIN = 0.1
private

Referenced by iterate_flux().


The documentation for this struct was generated from the following file: