ISSN Online: 2377-424X
International Heat Transfer Conference 5
HEAT TRANSFER ANALYSIS OF AIR BUBBLER SYSTEM
Abstract
An analytical and experimental study was conducted on the heat transfer characteristics of air bubblers. Two models describing bubble induced water motion were proposed. Model I assumes that the liquid motion is one-dimensional, upward in the center and downward along the column wall. Model II assumes that the induced jet is axisymmetric and after impinging on an ice surface becomes a surface jet. The experimental study determines ice melting rate as a function of air bubbling rate and column dimensions. The results are expressed in terms of thermal diffusivity and Nusselt number as a function of Reynolds number. The experimental results agree reasonably well with the predictions from Model II, thus lending validity to this model.