def viscosity_kinematic_alum(conc_alum, temp):
    """Return the dynamic viscosity of water at a given temperature.

    If given units, the function will automatically convert to Kelvin.
    If not given units, the function will assume Kelvin.
    This function assumes that the temperature dependence can be explained
    based on the effect on water and that there is no confounding effect from
    the coagulant.
    """
    nu = (1 + (4.255 * 10**-6) * conc_alum**2.289) * pc.viscosity_kinematic(temp).magnitude
    return nu