Natural convection cooling of vertical rectangular channels in air considering radiation and wall conduction

Temperature distributions on the surfaces of vertical channels formed by pa rallel plates heated uniformly and symmetrically and cooled by conduction, radiation, and natural convection in air are determined numerically and exp erimentally. Effects of wall separation, thickness, thermal conductivity, a nd emissivity on the wall temperature distribution are determined. Both cas es of controlled and uncontrolled channel edge leading and exit edge temper atures are examined. Optimum channel widths and correlations for the maximu m wall temperature rise are offered for both the controlled and uncontrolle d temperature conditions.