def schmdt_nmbr_MW(MW):
    """
    Return the Schmidt number [] from the mole weighted average of the oil,
    usefull in case of multi-component
    source : (Berry et al.2012)

    Parameters
    ----------
    MW : Mole weighted average of the oil [kg/mol]


    """

    return 1.3676 * (0.018/(MW*1000))**(-1/2)