rough_log_law.f90

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module rough_log_law
  use field, only: field_t
  use num_types, only : rp
  use json_module, only : json_file
  use coefs, only : coef_t
  use neko_config, only : neko_bcknd_device
  use vector, only : vector_t
  use wall_model, only : wall_model_t
  use utils, only : neko_error
  use registry, only : neko_registry
  use json_utils, only : json_get_or_lookup, &
       json_get_or_lookup_or_default
  use rough_log_law_device, only : rough_log_law_compute_device
  use rough_log_law_cpu, only : rough_log_law_compute_cpu
  use scratch_registry, only : neko_scratch_registry
  use math, only: masked_gather_copy_0
  use device_math, only: device_masked_gather_copy_0
  use logger, only : log_size, neko_log
  implicit none
  private
 
  type, public, extends(wall_model_t) :: rough_log_law_t
 
     real(kind=rp) :: kappa
     real(kind=rp) :: b
     real(kind=rp) :: z0
     ! The fluid density at the boundary
     type(vector_t) :: rho_w
   contains
     procedure, pass(this) :: init => rough_log_law_init
     procedure, pass(this) :: partial_init => rough_log_law_partial_init
     procedure, pass(this) :: finalize => rough_log_law_finalize
     procedure, pass(this) :: init_from_components => &
          rough_log_law_init_from_components
     procedure, pass(this) :: free => rough_log_law_free
     procedure, pass(this) :: compute => rough_log_law_compute
     ! Extract fluid properties at the wall (rho)
     procedure, pass(this) :: extract_properties => rough_log_law_extract_properties
  end type rough_log_law_t
 
contains
  subroutine rough_log_law_init(this, scheme_name, coef, msk, facet, &
       h_index, json)
    class(rough_log_law_t), intent(inout) :: this
    character(len=*), intent(in) :: scheme_name
    type(coef_t), intent(in) :: coef
    integer, intent(in) :: msk(:)
    integer, intent(in) :: facet(:)
    integer, intent(in) :: h_index
    type(json_file), intent(inout) :: json
    real(kind=rp) :: kappa, b, z0
 
    call json_get_or_lookup_or_default(json, "kappa", kappa, 0.4_rp)
    call json_get_or_lookup_or_default(json, "B", b, 0.0_rp)
    call json_get_or_lookup(json, "z0", z0)
 
    call this%init_from_components(scheme_name, coef, msk, facet, h_index, &
         kappa, b, z0)
  end subroutine rough_log_law_init
 
  subroutine rough_log_law_partial_init(this, coef, json)
    class(rough_log_law_t), intent(inout) :: this
    type(coef_t), intent(in) :: coef
    type(json_file), intent(inout) :: json
    character(len=LOG_SIZE) :: log_buf
 
    call this%partial_init_base(coef, json)
    call json_get_or_lookup_or_default(json, "kappa", this%kappa, 0.4_rp)
    call json_get_or_lookup_or_default(json, "B", this%B, 0.0_rp)
    call json_get_or_lookup(json, "z0", this%z0)
 
    call neko_log%section('Wall model')
    write(log_buf, '(A)') 'Model : Rough log law'
    call neko_log%message(log_buf)
    write(log_buf, '(A, E15.7)') 'kappa : ', this%kappa
    call neko_log%message(log_buf)
    write(log_buf, '(A, E15.7)') 'B : ', this%B
    call neko_log%message(log_buf)
    write(log_buf, '(A, E15.7)') 'z0 : ', this%z0
    call neko_log%message(log_buf)
    call neko_log%end_section()
 
  end subroutine rough_log_law_partial_init
 
  subroutine rough_log_law_finalize(this, msk, facet)
    class(rough_log_law_t), intent(inout) :: this
    integer, intent(in) :: msk(:)
    integer, intent(in) :: facet(:)
 
    call this%finalize_base(msk, facet)
 
    call this%rho_w%init(this%n_nodes)
 
  end subroutine rough_log_law_finalize
 
  subroutine rough_log_law_extract_properties(this)
    class(rough_log_law_t), intent(inout) :: this
 
    if (neko_bcknd_device .eq. 1) then
       call device_masked_gather_copy_0(this%rho_w%x_d, this%rho%x_d, this%msk_d, &
            this%rho%size(), this%rho_w%size())
    else
       call masked_gather_copy_0(this%rho_w%x, this%rho%x, this%msk, &
            this%rho%size(), this%rho_w%size())
    end if
  end subroutine rough_log_law_extract_properties
 
  subroutine rough_log_law_init_from_components(this, scheme_name, coef, msk, &
       facet, h_index, kappa, B, z0)
    class(rough_log_law_t), intent(inout) :: this
    character(len=*), intent(in) :: scheme_name
    type(coef_t), intent(in) :: coef
    integer, intent(in) :: msk(:)
    integer, intent(in) :: facet(:)
    integer, intent(in) :: h_index
    real(kind=rp), intent(in) :: kappa, b, z0
 
    call this%free()
    call this%init_base(scheme_name, coef, msk, facet, h_index)
 
    this%kappa = kappa
    this%B = b
    this%z0 = z0
 
    call this%rho_w%init(this%n_nodes)
 
    ! Check that the sampling height is above the roughness length
    if (any(this%h%x(1:this%n_nodes) .le. this%z0)) then
       call neko_error("Roughlog WM: Sampling height h must be greater than roughness z0. " // &
            "Increase h_index or decrease z0.")
    else if (this%z0 .eq. 0.0_rp) then
       call neko_error("Roughlog WM: Roughness z0 must be greater than 0.")
    end if
 
  end subroutine rough_log_law_init_from_components
 
  subroutine rough_log_law_free(this)
    class(rough_log_law_t), intent(inout) :: this
 
    call this%rho_w%free()
    call this%free_base()
 
  end subroutine rough_log_law_free
 
  subroutine rough_log_law_compute(this, t, tstep)
    class(rough_log_law_t), intent(inout) :: this
    real(kind=rp), intent(in) :: t
    integer, intent(in) :: tstep
    type(field_t), pointer :: u
    type(field_t), pointer :: v
    type(field_t), pointer :: w
 
    ! Extract boundary values for rho
    call this%extract_properties()
 
    u => neko_registry%get_field("u")
    v => neko_registry%get_field("v")
    w => neko_registry%get_field("w")
 
    if (neko_bcknd_device .eq. 1) then
       call rough_log_law_compute_device(u%x_d, v%x_d, w%x_d, this%ind_r_d, &
            this%ind_s_d, this%ind_t_d, this%ind_e_d, &
            this%n_x%x_d, this%n_y%x_d, this%n_z%x_d, &
            this%h%x_d, this%tau_x%x_d, this%tau_y%x_d, &
            this%tau_z%x_d, this%n_nodes, u%Xh%lx, this%kappa, &
            this%rho_w%x_d, this%B, this%z0, tstep)
    else
       call rough_log_law_compute_cpu(u%x, v%x, w%x, this%ind_r, this%ind_s, &
            this%ind_t, this%ind_e, this%n_x%x, this%n_y%x, this%n_z%x, &
            this%h%x, this%tau_x%x, this%tau_y%x, this%tau_z%x, &
            this%n_nodes, u%Xh%lx, u%msh%nelv, this%kappa, &
            this%rho_w%x, this%B, this%z0, tstep)
    end if
 
  end subroutine rough_log_law_compute
 
 
end module rough_log_law