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calc_dt.f90
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calc_dt.f90
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!Crown Copyright 2012 AWE.
!
! This file is part of CloverLeaf.
!
! CloverLeaf is free software: you can redistribute it and/or modify it under
! the terms of the GNU General Public License as published by the
! Free Software Foundation, either version 3 of the License, or (at your option)
! any later version.
!
! CloverLeaf is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
! FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
! details.
!
! You should have received a copy of the GNU General Public License along with
! CloverLeaf. If not, see http://www.gnu.org/licenses/.
!> @brief Driver for the timestep kernels
!> @author Wayne Gaudin
!> @details Invokes the user specified timestep kernel.
MODULE calc_dt_module
CONTAINS
SUBROUTINE calc_dt(chunk,local_dt,local_control,xl_pos,yl_pos,jldt,kldt)
USE clover_module
USE calc_dt_kernel_module
IMPLICIT NONE
INTEGER :: chunk
REAL(KIND=8) :: local_dt
CHARACTER(LEN=8) :: local_control
REAL(KIND=8) :: xl_pos,yl_pos
INTEGER :: jldt,kldt
INTEGER :: l_control
INTEGER :: small
local_dt=g_big
IF(chunks(chunk)%task.NE.parallel%task) RETURN
small = 0
IF(use_fortran_kernels)THEN
CALL calc_dt_kernel(chunks(chunk)%field%x_min, &
chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min, &
chunks(chunk)%field%y_max, &
g_small, &
g_big, &
dtmin, &
dtc_safe, &
dtu_safe, &
dtv_safe, &
dtdiv_safe, &
chunks(chunk)%field%xarea, &
chunks(chunk)%field%yarea, &
chunks(chunk)%field%cellx, &
chunks(chunk)%field%celly, &
chunks(chunk)%field%celldx, &
chunks(chunk)%field%celldy, &
chunks(chunk)%field%volume, &
chunks(chunk)%field%density0, &
chunks(chunk)%field%energy0, &
chunks(chunk)%field%pressure, &
chunks(chunk)%field%viscosity, &
chunks(chunk)%field%soundspeed,&
chunks(chunk)%field%xvel0, &
chunks(chunk)%field%yvel0, &
chunks(chunk)%field%work_array1,&
local_dt, &
l_control, &
xl_pos, &
yl_pos, &
jldt, &
kldt, &
small )
ELSEIF(use_C_kernels)THEN
CALL calc_dt_kernel_c(chunks(chunk)%field%x_min, &
chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min, &
chunks(chunk)%field%y_max, &
g_small, &
g_big, &
dtmin, &
dtc_safe, &
dtu_safe, &
dtv_safe, &
dtdiv_safe, &
chunks(chunk)%field%xarea, &
chunks(chunk)%field%yarea, &
chunks(chunk)%field%cellx, &
chunks(chunk)%field%celly, &
chunks(chunk)%field%celldx, &
chunks(chunk)%field%celldy, &
chunks(chunk)%field%volume, &
chunks(chunk)%field%density0, &
chunks(chunk)%field%energy0, &
chunks(chunk)%field%pressure, &
chunks(chunk)%field%viscosity, &
chunks(chunk)%field%soundspeed,&
chunks(chunk)%field%xvel0, &
chunks(chunk)%field%yvel0, &
chunks(chunk)%field%work_array1,&
local_dt, &
l_control, &
xl_pos, &
yl_pos, &
jldt, &
kldt, &
small )
ENDIF
IF(l_control.EQ.1) local_control='sound'
IF(l_control.EQ.2) local_control='xvel'
IF(l_control.EQ.3) local_control='yvel'
IF(l_control.EQ.4) local_control='div'
END SUBROUTINE calc_dt
END MODULE calc_dt_module