Heat Conduction in Nanofluid Suspensions

Abstract

The heat conduction mechanism in nanofluid suspensions is derived for transient processes attempting to explain experimental results, which reveal an impressive heat transfer enhancement. In particular, the effect of the surface-area-to-volume ratio (specific area) of the suspended nanoparticles on the heat transfer mechanism is explicitly accounted for, and reveals its contribution to the specific solution and results. The present analysis might provide an explanation that settles an apparent conflict between the recent experimental results in nanofluid suspensions and classical theories for estimating the effective thermal conductivity of suspensions that go back more than one century (Maxwell, J.C., 1891, Treatise on Electricity and Magnetism). Nevertheless, other possible explanations have to be accounted for and investigated in more detail prior to reaching a final conclusion on the former explanation.

Heat Conduction: Hyperbolic Self-similar Shock-waves in Solid Medium

“…The first lucky moment is that (12) relates f and g in a simple way g=βηf (13) if the α=2β universality relation is fulfilled.…”

Memory effects for the heat conductivity of random suspensions of spheres

“…This paper is dedicated to the memory of Professor Konstantin Markov on the occasion of the 65th anniversary of his birth. Vadasz 2006). Respectively, the mathematically analogous problem for the effective diffusivity of a particulate medium is of importance for modelling the suspensions of swollen microgel particles (Routh & Zimmerman 2003).…”

Variable Gravity Effects on Thermal Instability of Nanofluid in Anisotropic Porous Medium

“…Buongiorno (2006) noted that the nanoparticles absolute velocity can be viewed as the sum of the base fluid velocity and a relative (slip) velocity. Vadasz (2006) studied heat conduction in nanofluid suspensions whereas Alloui et al (2010) studied the natural convection of nanofluids in a shallow cavity heated from below. The Bénard problem (the onset of convection in a horizontal layer uniformly heated from below) for a nanofluid was studied by Tzou (2008a;b).…”