fluid_output.f90

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module fluid_output
  use num_types, only : rp
  use fluid_scheme, only : fluid_scheme_t
  use scalar_scheme, only : scalar_scheme_t
  use field_list, only : field_list_t
  use neko_config, only : neko_bcknd_device
  use device
  use output, only : output_t
  implicit none
  private
 
  type, public, extends(output_t) :: fluid_output_t
     type(field_list_t) :: fluid
   contains
     procedure, pass(this) :: sample => fluid_output_sample
  end type fluid_output_t
 
  interface fluid_output_t
     module procedure fluid_output_init
  end interface fluid_output_t
 
contains
 
  function fluid_output_init(precision, fluid, scalar, name, path) result(this)
    integer, intent(inout) :: precision
    class(fluid_scheme_t), intent(in), target :: fluid
    class(scalar_scheme_t), intent(in), optional, target :: scalar
    character(len=*), intent(in), optional :: name
    character(len=*), intent(in), optional :: path
    type(fluid_output_t) :: this
    character(len=1024) :: fname
 
    if (present(name) .and. present(path)) then
       fname = trim(path) // trim(name) // '.fld'
    else if (present(name)) then
       fname = trim(name) // '.fld'
    else if (present(path)) then
       fname = trim(path) // 'field.fld'
    else
       fname = 'field.fld'
    end if
 
    call this%init_base(fname, precision)
 
    if (present(scalar)) then
       call this%fluid%init(5)
    else
       call this%fluid%init(4)
    end if
 
    call this%fluid%assign(1, fluid%p)
    call this%fluid%assign(2, fluid%u)
    call this%fluid%assign(3, fluid%v)
    call this%fluid%assign(4, fluid%w)
 
    if (present(scalar)) then
       call this%fluid%assign(5, scalar%s)
    end if
 
  end function fluid_output_init
 
  subroutine fluid_output_sample(this, t)
    class(fluid_output_t), intent(inout) :: this
    real(kind=rp), intent(in) :: t
    integer :: i
 
    if (neko_bcknd_device .eq. 1) then
 
       associate(fields => this%fluid%items)
         do i = 1, size(fields)
            call device_memcpy(fields(i)%ptr%x, fields(i)%ptr%x_d, &
                 fields(i)%ptr%dof%size(), device_to_host, &
                 sync=(i .eq. size(fields))) ! Sync on the last field
         end do
       end associate
 
    end if
 
    call this%file_%write(this%fluid, t)
 
  end subroutine fluid_output_sample
 
end module fluid_output