Top: Evolution of the scale height (height above the disk that encloses 75% of the total gas mass at a given radius) for our four simulations. In all cases the scale height eventually converges, at which point the gas mass is well contained within 1 kpc of the midplane. Bottom: Temperature-density histograms for our simulations at t = 1.5 Gyr, weighted by the gas mass and limited to a disk of radius of r = 20 kpc and height of h = 1 kpc.