Read velocity vector from the vtk file
subroutine read_velocity()
!< Read velocity vector from the vtk file
implicit none
DebugCall('read_output_vtk: read_velocity')
read(IN_FILE_UNIT, *) !'CELL_DATA ', (imx-1)*(jmx-1)*(kmx-1)
read(IN_FILE_UNIT, *) !'VECTORS Velocity FLOAT'
do k = 1, kmx - 1
do j = 1, jmx - 1
do i = 1, imx - 1
read(IN_FILE_UNIT, *) x_speed(i, j, k), y_speed(i, j, k), z_speed(i, j, k)
end do
end do
end do
read(IN_FILE_UNIT, *)
end subroutine read_velocity