Entropy generation in thermal systems with solid structures – A concise review

Abstract

Analysis of thermal systems on the basis of the second law of thermodynamics has recently gained considerable attention. This is, in part, due to the fact that this approach along with the powerful tools of entropy generation and exergy destruction provides a unique method for the analysis of a variety of systems encountered in science and engineering. Further, in recent years there has been a surge of interest in the thermal analysis of conductive media which include solid structures. In this work, the recent advances in the second law analyses of these systems are reviewed with an emphasis on the theoretical and modelling aspects. The effects of including solid components on the entropy generation within different thermal systems are first discussed. The mathematical methods used in this branch of thermodynamics are, then, reviewed. This is followed by the conclusions regarding the existing challenges and opportunities for further research.

Generation of entropy and forced convection of heat in a conduit partially filled with porous media – Local thermal non-equilibrium and exothermicity effects

“…The generation of entropy in porous media has been investigated by a number of individuals. The subject has been recently reviewed by Torabi et al [25] and hence, only an overview of the relevant literature is given here. Hooman and Ejlali [26] numerically solved the Darcy-Brinkman model and the one-equation energy model for a fully filled porous pipe under developing conditions.…”

Theoretical investigation of entropy generation and heat transfer by forced convection of copper–water nanofluid in a porous channel — Local thermal non-equilibrium and partial filling effects

“…In addition to heat transfer analysis, entropy generation minimisation is now considered as a powerful 7 method of optimising various thermal systems [26,27,28]. In recent years there has been a growing interest in 8 understanding the entropic behaviour of nanofluids and porous systems [12,29,30].…”

First and second law analyses of nanofluid forced convection in a partially-filled porous channel – The effects of local thermal non-equilibrium and internal heat sources

“…through a second law analysis [30,31]. Entropy generation studies have already been conducted on a wide range…”