Universiti Teknologi Malaysia Institutional Repository

Heat transfer enhancement of nanofluids flow in microtube with constant heat flux

Salman, B. H. and Mohammed, H. A. and Kherbeet, A. S. (2012) Heat transfer enhancement of nanofluids flow in microtube with constant heat flux. International Communications in Heat and Mass Transfer, 39 (8). pp. 1195-1204. ISSN 0735-1933

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Official URL: https://www.sciencedirect.com/science/article/pii/...

Abstract

In this paper, laminar convective heat transfer in a two-dimensional microtube (MT) with 50μm diameter and 250μm length with constant heat flux is numerically investigated. The governing (continuity, momentum and energy) equations were solved using the finite volume method (FVM) with the aid of SIMPLE algorithm. Different types of nanofluids Al 2O 3, CuO, SiO 2 and ZnO, with different nanoparticle size 25, 45, 65 and 80nm, and different volume fractions ranged from 1% to 4% using ethylene glycol as a base fluid were used. This investigation covers Reynolds number in the range of 10 to 1500. The results have shown that SiO 2-EG nanofluid has the highest Nusselt number, followed by ZnO-EG, CuO-EG, Al 2O 3-EG, and lastly pure EG. The Nusselt number for all cases increases with the volume fraction but it decreases with the rise in the diameter of nanoparticles. In all configurations, the Nusselt number increases with Reynolds number. In this paper, laminar convective heat transfer in a two-dimensional microtube (MT) with 50μm diameter and 250μm length with constant heat flux is numerically investigated. The governing (continuity, momentum and energy) equations were solved using the finite volume method (FVM) with the aid of SIMPLE algorithm. Different types of nanofluids Al 2O 3, CuO, SiO 2 and ZnO, with different nanoparticle size 25, 45, 65 and 80nm, and different volume fractions ranged from 1% to 4% using ethylene glycol as a base fluid were used. This investigation covers Reynolds number in the range of 10 to 1500. The results have shown that SiO 2-EG nanofluid has the highest Nusselt number, followed by ZnO-EG, CuO-EG, Al 2O 3-EG, and lastly pure EG. The Nusselt number for all cases increases with the volume fraction but it decreases with the rise in the diameter of nanoparticles. In all configurations, the Nusselt number increases with Reynolds number.

Item Type:Article
Uncontrolled Keywords:Numerical modeling, Nanofluids, Microtube, Heat transfer enhancement
Subjects:Q Science > QC Physics
Divisions:Mechanical Engineering
ID Code:47046
Deposited By: Fazli Masari
Deposited On:22 Jun 2015 13:56
Last Modified:14 Oct 2018 16:19

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