simple_brinkman_source_term.f90

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! a term in the form $\chi \mathbf{u}$
module simple_brinkman_source_term
  use num_types, only: rp
  use field_list, only: field_list_t
  use json_module, only: json_file
  use json_utils, only: json_get, json_get_or_default
  use source_term, only: source_term_t
  use coefs, only: coef_t
  use neko_config, only: neko_bcknd_device
  use utils, only: neko_error
  use field, only: field_t
  use field_math, only: field_subcol3
  implicit none
  private
 
  ! We have a source term of the form $\chi \mathbf{u}$
  type, public, extends(source_term_t) :: simple_brinkman_source_term_t
     type(field_t), pointer :: chi => null()
     type(field_t), pointer :: u => null()
     type(field_t), pointer :: v => null()
     type(field_t), pointer :: w => null()
 
   contains
     procedure, pass(this) :: init => &
          simple_brinkman_source_term_init_from_json
     procedure, pass(this) :: init_from_components => &
          simple_brinkman_source_term_init_from_components
     procedure, pass(this) :: free => simple_brinkman_source_term_free
     procedure, pass(this) :: compute_ => simple_brinkman_source_term_compute
  end type simple_brinkman_source_term_t
 
contains
  subroutine simple_brinkman_source_term_init_from_json(this, json, fields, &
       coef, variable_name)
    class(simple_brinkman_source_term_t), intent(inout) :: this
    type(json_file), intent(inout) :: json
    type(field_list_t), intent(in), target :: fields
    type(coef_t), intent(in), target :: coef
    character(len=*), intent(in) :: variable_name
 
 
    ! we shouldn't be initializing this from JSON
    ! maybe throw an error?
 
 
  end subroutine simple_brinkman_source_term_init_from_json
 
  subroutine simple_brinkman_source_term_init_from_components(this, &
       f_x, f_y, f_z, chi, u, v, w, coef)
    class(simple_brinkman_source_term_t), intent(inout) :: this
    type(field_t), pointer, intent(in) :: f_x, f_y, f_z
    type(field_list_t) :: fields
    type(coef_t) :: coef
    real(kind=rp) :: start_time
    real(kind=rp) :: end_time
    type(field_t), intent(in), target :: u, v, w
    type(field_t), intent(in), target :: chi
 
    ! I wish you didn't need a start time and end time...
    ! but I'm just going to set a super big number...
    start_time = 0.0_rp
    end_time = 100000000.0_rp
 
    call this%free()
 
    ! this is copying the fluid source term init
    ! We package the fields for the source term to operate on in a field list.
    call fields%init(3)
    call fields%assign(1, f_x)
    call fields%assign(2, f_y)
    call fields%assign(3, f_z)
 
    call this%init_base(fields, coef, start_time, end_time)
 
    ! point everything in the correct places
    this%u => u
    this%v => v
    this%w => w
    ! and get chi out of the design
    this%chi => chi
 
  end subroutine simple_brinkman_source_term_init_from_components
 
  subroutine simple_brinkman_source_term_free(this)
    class(simple_brinkman_source_term_t), intent(inout) :: this
 
    call this%free_base()
  end subroutine simple_brinkman_source_term_free
 
  subroutine simple_brinkman_source_term_compute(this, t, tstep)
    class(simple_brinkman_source_term_t), intent(inout) :: this
    real(kind=rp), intent(in) :: t
    integer, intent(in) :: tstep
    type(field_t), pointer :: fu, fv, fw
 
    fu => this%fields%get_by_index(1)
    fv => this%fields%get_by_index(2)
    fw => this%fields%get_by_index(3)
 
    call field_subcol3(fu, this%u, this%chi)
    call field_subcol3(fv, this%v, this%chi)
    call field_subcol3(fw, this%w, this%chi)
 
  end subroutine simple_brinkman_source_term_compute
 
end module simple_brinkman_source_term