Natural Convection Heat Transfer from Horizontal Heated Surface with Cylindrical Heated Pipe

(Effects of slit)

Abstract

Effect of the heated cylindrical pipe with the slit on natural convection heat transfer from the horizontal heated surface was investigated experimentally. The flow fields around the horizontal heated surface and the heated cylinder were visualized. With decreasing the distance of between the heaters, the induced flow rate decreases and reversed flow occurs. Reversed flow develops with increasing the width of the slit. When reversed flow reaches the heater, the heat transfer coefficients at the center are promoted.

The Nusselt number is proportional to the modified Rayleigh number at the power in general.