Analysis of Entropy Generation during the Convective Quenching of a Cluster of Balls

Abstract

An entropy generation analysis is carried out for convective quenching of cluster of hot balls in a pool of three common quenchants (molten salt, water and oil). The formulation is based on the conservation principle in Eulerian framework following a two-fluid approach and clearly indicates the contribution due to thermal irreversibility as a result of finite temperature gradient and that due to viscous effect arising out of drag. The time averaged normalized entropy generation is used to find the most suitable injection velocity in the quenching process for molten salt. The quenching process is optimized by using the entropy generation parameter.

Acknowledgments

The authors gratefully acknowledge the suggestions and comments of Prof. Achintya Mukhopadhyay, Department of Mechanical Engineering, Jadavpur University, India, for improvement of this paper.