def brock_bird_scaling(phase, sigma_o, To,
                       pore_T='pore.temperature',
                       pore_Tc='pore.critical_temperature',
                       **params):
    r"""
    Uses Brock_Bird model to adjust surface tension from it's value at a given
    reference temperature to temperature of interest

    Parameters
    ----------
    To : float
        Reference temperature (K)

    sigma_o : float
        Surface tension at reference temperature (N/m)

    pore_T : string
        The dictionary key containing the temperature values (K)

    pore_Tc : string
        The dictionary key containing the critical temperature values (K)
    """
    Tc = phase[pore_Tc]
    Ti = phase[pore_T]
    Tro = To/Tc
    Tri = Ti/Tc
    value = sigma_o*(1-Tri)**(11/9)/(1-Tro)**(9/11)
    return value
dataset/ETHPy150Open PMEAL/OpenPNM/OpenPNM/Phases/models/surface_tension.py/brock_bird_scaling/swapped operands of `/`