def Stokes(Re):
    """Calculates drag coefficient of a smooth sphere using Stoke's law.

    .. math::
        C_D = 24/Re

    Parameters
    ----------
    Re : float
        Reynolds number of the sphere, [-]

    Returns
    -------
    Cd : float
        Drag coefficient [-]

    Notes
    -----
    Range is Re <= 0.3

    Examples
    --------
    >>> Stokes(0.1)
    240.0

    References
    ----------
    .. [1] Rhodes, Martin J. Introduction to Particle Technology. Wiley, 2013.
    """
    Cd = 24.0 / Re
    return Cd
