Heat transfer enhancement by the chimney effect in a vertical isoflux channel

摘要

The ease of thermal control by means of air natural convection stimulates the investigation of configurations with the aim at improving the thermal performance. The effect of adding adiabatic extensions downstream of a vertical isoflux symmetrically heated channel has been experimentally analyzed. Optimal configuratins have been identified through the measured wall temperature profiles, with reference to the extension and expansion ratios(L/L_h and B/b)of the insulated extensions.