Numerical Investigation Of Transient Single
Phase Forced Convection Of Nanofluids In
Circular Tubes
Author(s)
V. Bianco, O. Manca & S. Nardini
Abstract
In this paper the development of the laminar forced convection flow of a water–
Al2O3 nanofluid in a circular tube submitted to a constant and uniform heat flux
at the wall is numerically investigated in a transient regime. A single and twophase
model (discrete particles model) is employed with either constant or
temperature-dependent properties. The investigation is accomplished for a
particle size equal to 100 nm. The convective heat transfer coefficient for
nanofluids is greater than that of the base liquid. Heat transfer enhancement
increases with the particle volume concentration, but it is accompanied by
increasing wall shear stress values.
Keywords: nanofluid, forced convection, transient numerical analysis.
1 Introduction
Convective heat transfer enhancement is a continuous demand in many industrial
heating or cooling equipment. An innovative technique for improving heat
transfer by using ultra fine solid particles in the fluids has been used extensively
during the last decade. Maxwell [1] showed the possibility of increasing thermal
conductivity of a mixture by greater volume fraction of solid particles. These
fluids, containing colloidal suspended nanoparticles, have been called
nanofluids. Nowadays there is a fast growth of research activities in this heat
transfer area, as recently reviewed for example in [2–4].
Keywords
nanofluid, forced convection, transient numerical analysis.
Related Book
Other papers in this volume
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