  We present results of 3D hydrodynamical simulations of HD209458b including a
coupled, radiatively-active cloud model ({\sc EddySed}). We investigate the
role of the mixing by replacing the default convective treatment used in
previous works with a more physically relevant mixing treatment ($K_{zz}$)
based on global circulation. We find that uncertainty in the efficiency of
sedimentation through the sedimentation factor $f_\mathrm{sed}$ plays a larger
role in shaping cloud thickness and its radiative feedback on the local gas
temperatures -- e.g. hot spot shift and day-to-night side temperature gradient
-- than the switch in mixing treatment. We demonstrate using our new mixing
treatments that simulations with cloud scales which are a fraction of the
pressure scale height improve agreement with the observed transmission spectra,
the emission spectra, and the Spitzer 4.5 $\mathrm{\mu m}$ phase curve,
although our models are still unable to reproduce the optical and UV
transmission spectra. We also find that the inclusion of cloud increases the
transit asymmetry in the optical between the east and west limbs, although the
difference remains small ($\lesssim 1\%$).
