Temperature and Entropy Generation Analyses Between and Inside Rotating Cylinders Using Copper-Water Nanofluid

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

13 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)051701-1 - 051701-10
Journal / PublicationJournal of Heat Transfer
Volume137
Issue number5
Online published3 Feb 2015
Publication statusPublished - 1 May 2015

Abstract

Entropy generation is squarely linked with irreversibility, and consequently with exergy destruction within a thermal system. This study concerns with the temperature distribution, and local and volumetric averaged entropy generation rates within a cylindrical system with two solid co-rotating inner and outer parts and the middle nanofluid flow part. Temperature-dependent thermal conductivities for solid materials are included within the modeling. To obtain the temperature formula within all three sections, a combined analytical-numerical solution technique is applied. An exact analytical solution is also obtained, when constant thermal conductivities for solid materials are assumed. The resultant data from the analytical-numerical solution technique is verified against the investigated exact solution. Thereafter, the velocity and temperature fields from the combined analytical-numerical solution technique are incorporated into the entropy generation formulations to obtain the local and volumetric averaged entropy generation rates. Using abovementioned procedure, the effects of thermophysical parameters such as nanoparticles volume concentration, Brinkman number, thermal conductivity parameter ratios, outer temperature boundary condition, internal heat generation rates and velocity ratios on the temperature field, and entropy generation rates are investigated.

Research Area(s)

  • local and volumetric entropy generation rates, heat transfer, nanofluid flow, temperature distribution, corotating cylinders, combined analytical-numerical solution