HYDROTHERMAL CHARACTERISTICS OF THIN LIQUID FILM FLOW ON HORIZONTAL ROTATING DISK

The paper describes hydrothermal characteristics of liquid flowing on horizontal rotating disk. The liquid was introduced at the centre of the disk in the form of a falling jet. Liquid spread out due to the simultaneous action of surface and body forces and forms a thin film over the disk. The effect of nozzle to plate spacing, fluid flow rate and disk rotational speed on the film thickness, local heat transfer coefficient and local Nusselt number along the radial direction was investigated.It was observed that local heat transfer coefficient and local Nusselt number strongly depends upon flow rate and disk rotational speed and has no influence of nozzle to plate spacing. The study also concludes that the process of heat transfer is intensified manifold by rotating the surface, which will be helpful in the future heat and mass transfer applications.