def METHOD_NAME(T_dim):
    """Equation 9.4.3 from Properties of Gases and Liquids.
    .. math::
      \\Omega(T^*) = A(T^*)^{-B} +  C\\exp(-DT^*) + E\\exp(-FT^*)
    in which :math:`A=1.16145`, :math:`B=0.14874`, :math:`C=0.52487`, :math:`D=0.77320`, :math:`E=2.16178`, and :math:`F=2.43787`.
    """
    A = 1.16145
    B = 0.14874
    C = 0.52487
    D = 0.77320
    E = 2.16178
    F = 2.43787
    return A * T_dim**-B + C * pyo.exp(-D * T_dim) + E * pyo.exp(-F * T_dim)