@property<EOL><INDENT>def nul(self):<DEDENT>
mul, rhol = self.mul, self.rhol<EOL>if all([mul, rhol]):<EOL><INDENT>return nu_mu_converter(mu=mul, rho=rhol)<EOL><DEDENT>return None<EOL>
r'''Kinematic viscosity of the liquid phase of the mixture if one
        exists at its current temperature and pressure, in units of [m^2/s].

        .. math::
            \nu = \frac{\mu}{\rho}

        Examples
        --------
        >>> Mixture(['methane'], ws=[1], T=110).nul
        2.858088468937333e-07