Local entropy generation in co-flowing turbulent jets with variable density

Abstract

Purpose

The effects of a co-flow and inlet jet temperature on local entropy generation in turbulent round jets have been studied numerically. The second-order closure turbulence model has been used. The paper aims to discuss these issues.

Design/methodology/approach

Numerical results are presented and discussed.

Findings

The numerical results for the mean quantities, entrainment of air, mixing efficiency, generation of entropy rate and Merit number are presented and discussed.

Originality/value

The expansion of the jet at low velocity of the co-flow and high inlet jet temperature enhances the heat transfer rate and reduces the irreversibility of the jet.

Citation

Hichem Gazzah, M. and Belmabrouk, H. (2014), "Local entropy generation in co-flowing turbulent jets with variable density", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 24 No. 8, pp. 1679-1695. https://doi.org/10.1108/HFF-02-2013-0055