def separation_demister_ElDessouky(vs, voidage, d_wire, d_drop):
    r'''Calculates droplet removal by a demister as a fraction from 0 to 1,
    using the correlation in [1]_. Uses only their own experimental data.
    
    .. math::
        \eta = 0.85835(d_w)^{-0.28264}(1-\epsilon)^{0.099625}(V)^{0.106878}
        (d_p)^{0.383197}
        
    Parameters
    ----------
    vs : float
        Superficial velocity of fluid, Q/A [m/s]
    voidage : float
        Voidage of bed of the demister material, normally ~0.98 []
    d_wire : float
        Diameter of mesh wire,[m]
    d_drop : float
        Drop diameter, [m]

    Returns
    -------
    eta : float
        Fraction droplets removed by mass [-]

    Notes
    -----
    No dependency on the liquid properties is included here. Because of the
    exponential nature of the correlation, for smaller diameters separation
    quickly lowers. This correlation can predict a separation larger than 1
    for higher velocities, lower voidages, lower wire diameters, and large 
    droplet sizes. This function truncates these larger values to 1.
    
    The correlation in [1]_ was presented as follows, with wire diameter in
    units of mm, density in kg/m^3, V in m/s, separation in %, and particle
    diameter in mm.
    
    .. math::
        \eta = 17.5047(d_w)^{-0.28264}(\rho_{mesh})^{0.099625}(V)^{0.106878}
        (d_p)^{0.383197}
    
    Here, the correlation is converted to base SI units and to use voidage;
    not all demisters are stainless steel as in [1]_. A density of 7999 kg/m^3 
    was used in the conversion.
    
    In [1]_, V ranged from 0.98-7.5 m/s, rho from 80.317-208.16 kg/m^3, depth 
    from 100 to 200 mm, wire diameter of 0.2 mm to 0.32 mm, and particle 
    diameter from 1 to 5 mm.
    
    Examples
    --------
    >>> separation_demister_ElDessouky(1.35, 0.974, 0.0002, 0.005)
    0.8982892997640582
    
    References
    ----------
    .. [1] El-Dessouky, Hisham T, Imad M Alatiqi, Hisham M Ettouney, and Noura 
       S Al-Deffeeri. "Performance of Wire Mesh Mist Eliminator." Chemical 
       Engineering and Processing: Process Intensification 39, no. 2 (March 
       2000): 129-39. doi:10.1016/S0255-2701(99)00033-1.
    '''
    eta = 0.858352355761947*d_wire**-0.28264*(1-voidage)**0.099625*vs**0.106878*d_drop**0.383197
    return min(eta, 1.0)
r'''Calculates droplet removal by a demister as a fraction from 0 to 1,
    using the correlation in [1]_. Uses only their own experimental data.
    
    .. math::
        \eta = 0.85835(d_w)^{-0.28264}(1-\epsilon)^{0.099625}(V)^{0.106878}
        (d_p)^{0.383197}
        
    Parameters
    ----------
    vs : float
        Superficial velocity of fluid, Q/A [m/s]
    voidage : float
        Voidage of bed of the demister material, normally ~0.98 []
    d_wire : float
        Diameter of mesh wire,[m]
    d_drop : float
        Drop diameter, [m]

    Returns
    -------
    eta : float
        Fraction droplets removed by mass [-]

    Notes
    -----
    No dependency on the liquid properties is included here. Because of the
    exponential nature of the correlation, for smaller diameters separation
    quickly lowers. This correlation can predict a separation larger than 1
    for higher velocities, lower voidages, lower wire diameters, and large 
    droplet sizes. This function truncates these larger values to 1.
    
    The correlation in [1]_ was presented as follows, with wire diameter in
    units of mm, density in kg/m^3, V in m/s, separation in %, and particle
    diameter in mm.
    
    .. math::
        \eta = 17.5047(d_w)^{-0.28264}(\rho_{mesh})^{0.099625}(V)^{0.106878}
        (d_p)^{0.383197}
    
    Here, the correlation is converted to base SI units and to use voidage;
    not all demisters are stainless steel as in [1]_. A density of 7999 kg/m^3 
    was used in the conversion.
    
    In [1]_, V ranged from 0.98-7.5 m/s, rho from 80.317-208.16 kg/m^3, depth 
    from 100 to 200 mm, wire diameter of 0.2 mm to 0.32 mm, and particle 
    diameter from 1 to 5 mm.
    
    Examples
    --------
    >>> separation_demister_ElDessouky(1.35, 0.974, 0.0002, 0.005)
    0.8982892997640582
    
    References
    ----------
    .. [1] El-Dessouky, Hisham T, Imad M Alatiqi, Hisham M Ettouney, and Noura 
       S Al-Deffeeri. "Performance of Wire Mesh Mist Eliminator." Chemical 
       Engineering and Processing: Process Intensification 39, no. 2 (March 
       2000): 129-39. doi:10.1016/S0255-2701(99)00033-1.