Semi-Analytical Model for Bubble Departure Diameter Prediction for Triangular Grooved Surface

Abstract

This paper presents experimental studies of pool boiling heat transfer from plain and triangular grooved surfaces to water at atmospheric pressure. Visualization technique is used to investigate the boiling phenomenon using high speed digital camera with image acquisition speed of 1000 fps at resolution of 320 x 240 pixels. It is observed that surface modification with grooves improves the boiling heat transfer. Various aspects of bubble behaviour on plain and grooved surfaces were investigated. The bubble generation frequency was higher for grooved surfaces. The average error in bubble departure diameter prediction of the semi-analytical model developed is 29.22%. © 2019, Toronto Metropolitan University. All rights reserved.