fluid_aux.f90

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module fluid_aux
  use, intrinsic :: ieee_arithmetic, only : ieee_is_nan
  use krylov, only : ksp_monitor_t
  use logger, only : neko_log, log_size
  use utils, only : neko_error, neko_warning
  use time_state, only : time_state_t
  implicit none
  private
 
  public :: fluid_step_info, fluid_step_info_reset_stabilized
 
  logical, public, protected :: stabilized = .false.
 
contains
 
  subroutine fluid_step_info(time, ksp_results, full_stress_formulation, &
       strict_convergence, allow_stabilization, iteration)
    type(ksp_monitor_t), dimension(:), intent(in) :: ksp_results
    type(time_state_t), intent(in) :: time
    logical, intent(in) :: full_stress_formulation
    logical, intent(in), optional :: strict_convergence
    logical, intent(in), optional :: allow_stabilization
    integer, intent(in), optional :: iteration
    logical :: converged, strict_conv, allow_stab
    character(len=LOG_SIZE) :: log_buf
    integer :: i, n
 
    n = size(ksp_results)
    if (full_stress_formulation) n = 2
 
    if (present(strict_convergence)) then
       strict_conv = strict_convergence
    else
       strict_conv = .false.
    end if
 
    if (present(allow_stabilization)) then
       allow_stab = allow_stabilization
    else
       allow_stab = .false.
    end if
 
    if (present(iteration)) then
       if (iteration .gt. 1) then
          write(log_buf, '(A,I3)') 'Schwarz-like iteration ', iteration - 1
          call neko_log%message(log_buf)
       end if
    end if
 
    ! Do the printing
    call ksp_results(1)%print_header()
    do i = 1, n
       call ksp_results(i)%print_result(time%tstep)
    end do
 
    ! Check for convergence
    converged = .true.
    do i = 1, n
       if (ieee_is_nan(ksp_results(i)%res_final)) then
          call neko_error("Fluid solver diverged for " // &
               trim(ksp_results(i)%name))
       end if
 
       if (.not. ksp_results(i)%converged) then
          converged = .false.
          log_buf = 'Fluid solver did not converge for ' &
               // trim(ksp_results(i)%name)
 
          if (.not. stabilized .and. allow_stab) then
             continue
          else if (strict_conv) then
             call neko_error(log_buf)
          else
             call neko_log%message(log_buf)
          end if
       end if
    end do
 
    ! Update stabilized status
    if (.not. stabilized) stabilized = converged
 
  end subroutine fluid_step_info
 
  subroutine fluid_step_info_reset_stabilized()
    stabilized = .false.
  end subroutine fluid_step_info_reset_stabilized
 
end module fluid_aux