Compute the residue using the Van-Leer scheme
subroutine get_residue()
!< Compute the residue using the Van-Leer scheme
!-----------------------------------------------------------
implicit none
integer :: i, j, k, l
call dmsg(1, 'van_leer', 'compute_residue')
do l = 1, n_var
do k = 1, kmx - 1
do j = 1, jmx - 1
do i = 1, imx - 1
residue(i, j, k, l) = F(i+1, j, k, l) - F(i, j, k, l) &
+ G(i, j+1, k, l) - G(i, j, k, l) &
+ H(i, j, k+1, l) - H(i, j, k, l)
end do
end do
end do
end do
end subroutine get_residue