tem_cylindricalWave_module.f90 Source File


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Contents


Source Code

! Copyright (c) 2014 Jens Zudrop <j.zudrop@grs-sim.de>
! Copyright (c) 2014, 2016, 2019 Harald Klimach <harald.klimach@uni-siegen.de>
! Copyright (c) 2014 Rishabh Chandola <rishabh.chandola@student.uni-siegen.de>
! Copyright (c) 2016 Tobias Schneider <tobias1.schneider@student.uni-siegen.de>
! Copyright (c) 2016 Kannan Masilamani <kannan.masilamani@uni-siegen.de>
! Copyright (c) 2016 Jiaxing Qi <jiaxing.qi@uni-siegen.de>
!
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions are met:
!
! 1. Redistributions of source code must retain the above copyright notice, this
! list of conditions and the following disclaimer.
!
! 2. Redistributions in binary form must reproduce the above copyright notice,
! this list of conditions and the following disclaimer in the documentation
! and/or other materials provided with the distribution.
!
! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
! AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
! FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
! CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
! OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
! OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! ****************************************************************************** !
!> This module gathers information for the scalar cylindrical wave.
!!
module tem_cylindricalWave_module

  ! include treelm modules
  use env_module,         only: rk
  use tem_aux_module,     only: tem_abort
  use tem_logging_module, only: logUnit

  ! include aotus modules
  use aotus_module,     only: aoterr_NonExistent, flu_state
  use aot_table_module, only: aot_table_open, aot_table_close,                 &
   &                          aot_table_length, aot_get_val

  implicit none

  public :: tem_load_cylindricalWave, tem_cylindricalWave_type, &
    &       tem_eval_cylindricalWave

  !> This type contains datas to define the scalar cylindrical wave.
  type tem_cylindricalWave_type
    !> The wave order
    integer :: order
    !> The radial constant
    real(kind=rk) :: radialConstant
    !> The cut radius of the cylindrical wave
    real(kind=rk) :: radius
  end type tem_cylindricalWave_type


contains

  !> Load definition of the scalar cylindrical wave.
  subroutine tem_load_cylindricalWave(conf, thandle, me)
    ! ---------------------------------------------------------------------------
    !> lua state type
    type(flu_State) :: conf
    !> aotus parent handle
    integer, intent(in) :: thandle
    type(tem_cylindricalWave_type), intent(out) :: me
    ! ---------------------------------------------------------------------------
    integer :: iError
    ! ---------------------------------------------------------------------------

    write(logUnit(1),*) 'Loading predefined function for cylindrical wave: '

    ! radius
    call aot_get_val( L       = conf,        &
      &               thandle = thandle,     &
      &               key     = 'radius',    &
      &               val     = me%radius,   &
      &               ErrCode = iError )
    if(iError.ne.0) then
      write(logUnit(1),*) 'ERROR in tem_load_cylindricalWave: not able '
      write(logUnit(1),*) 'to read radius for cylin. wave form config file.'
      call tem_abort()
    end if
    write(logUnit(1),*) ' * radius =', me%radius

    ! order
    call aot_get_val( L       = conf,     &
      &               thandle = thandle,  &
      &               key     = 'order',  &
      &               val     = me%order, &
      &               ErrCode = iError    )
    if(iError.ne.0) then
      write(logUnit(1),*) 'ERROR in tem_load_cylindricalWave: not able '
      write(logUnit(1),*) 'to read order for cylin. wave form config file.'
      call tem_abort()
    end if
    write(logUnit(1),*) ' * order =', me%order

    ! radial constant
    call aot_get_val( L       = conf,              &
      &               thandle = thandle,           &
      &               key     = 'radialconstant',  &
      &               val     = me%radialconstant, &
      &               ErrCode = iError             )
    if(iError.ne.0) then
      write(logUnit(1),*) 'ERROR in tem_load_cylindricalWave: not able '
      write(logUnit(1),*) 'to read radialconstant for cylin. '// &
        &                 'wave form config file.'
      call tem_abort()
    end if
    write(logUnit(1),*) ' * radialconstant =', me%radialconstant


  end subroutine tem_load_cylindricalWave


  !> Calculate the function values for the cylindrical wave.
  function tem_eval_cylindricalWave(me, coord, time, n) result(res)
    !> Spacetime function to evaluate
    type(tem_cylindricalWave_type) :: me
    !> Number of arrays to return
    integer, intent(in) :: n
    !> barycentric Ids of an elements.
    !! 1st index goes over number of elements and
    !! 2nd index goes over x,y,z coordinates
    real(kind=rk), intent( in ) :: coord(n,3)
    !> The current physical time
    real(kind=rk), intent( in )  :: time
    !> return value
    real(kind=rk) :: res(n)
    ! ---------------------------------------------------------------------------
    real(kind=rk) :: polar(n,2)
    integer :: i
    ! ---------------------------------------------------------------------------

    polar = cart2polar(coord, n)

    do i = 1,n
      if(polar(i,1) <= me%radius) then
        res(i) = bessel_jn(me%order, me%radialConstant * polar(i,1) ) &
           & * cos(real(me%order,rk)*polar(i,2) + me%radialConstant*time)
      else
        res(i) = 0.0_rk
      end if
    end do

  end function tem_eval_cylindricalWave

  !> Convert from cartesian coordinates (in the x-y plane) to
  !! polar coordinates (radius,angle)
  function cart2polar(coord, n) result(polar)
    ! --------------------------------------------------------------------------
    integer, intent(in) :: n
    real(kind=rk),intent(in) :: coord(n,3)
    !> Polar coordinates, radius (first entry) and angle (second entry)
    real(kind=rk) :: polar(n,2)
    ! --------------------------------------------------------------------------
    !> X coordinate
    real(kind=rk) :: x
    !> Y coordinate
    real(kind=rk) :: y
    integer :: i
    ! --------------------------------------------------------------------------

    do i = 1,n

      x = coord(i,1)
      y = coord(i,2)

      polar(i,1) = sqrt(x*x + y*y)

      ! Atan2 is not defined when both coordinates are zero. To cover
      ! this situation correctly, we define the angle to be 0.
      if(polar(i,1) > epsilon(1.0_rk) ) then
        polar(i,2) = atan2(y,x)
      else
        polar(i,2) = 0.0_rk
      end if

    end do

  end function cart2polar

end module tem_cylindricalWave_module