Study of entropy generation and evaluation statistical heat transfer properties in turbulent flow

علوم کاربردی و محاسباتی در مکانیک

Article 5, Volume 29, Issue 1 - Serial Number 17, May 2017, Pages 63-80   

Document Type: Original Article

DOI: 10.22067/fum-mech.v29i1.59586

Authors

Farhad Vahidinia; Mohadeseh Miri; Behrooz Keshtegar^*

University of Zabol

Abstract

In this paper, effect of the nanoparticles diameter on the forced convection heat transfer of turbulent flow of Al2O3-water nanofluids in a circular tube under constant heat flux on the wall using of two phase mixture model numerically investigated and was statistical analysis. The Volume fraction of nanoparticles is %3, the Reynolds number is 5×104 and the variation of diameter of nanoparticles is assumed in the range of 20- 110nm. In the statistical analysis, from the continuous probability distribution functions such as Gamma, Normal, Lognormal, Gumbel, Weibull and Frechet were used. After reviewing the results, it was found that by increasing the diameter of nanoparticles, the Nusselt number is reduced and this parameter due to changes in the nanoparticles of diameter has followed of the Frechet probability distribution function.

Keywords

Nanofluid; Convection heat transfer; nanoparticles diameter; Nusselt Number; Probability density function; Statistical properties

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