def air_dynamic_viscosity(T):
    """The kinematic viscosity of air.

    Args:
        T: Ambient temperature [K].

    Returns:
        The kinematic viscosity [Pa/s].
    """
    mu0 = 1.716e-5
    T0 = 273.15
    C = 111.0
    return mu0 * ((T0+C)/(T+C)) * (T/T0)**1.5