Heat transfer from immersed surfaces in liquid fluidised beds

Abstract Heat transfer data were obtained using a small electrically-heated simulated plate immersed in a liquid—fluidised bed. For steel balls and for spherical and cylindrical particles of glass fluidised by dimethyl phthalate, two correlations valid over the voidage range 0.40–0.85 were obtained; one was based on the Reynolds number (Re0), involving the particle diameter and its terminal falling velocity, and the other on a modified Reynolds number (Rem) incorporating the interstitial velocity and the volume: surface ratio of the voids. and In the above eqns, St is the Stanton number, Jh the Colburn heat transfer factor and e the voidage. K is a constant depending on the properties of the solid particles.