## Thermal Convection in Nanofluids

- March 29, 2011
- 3:30 p.m.
- LeConte 412

## Abstract

Nanofluids consist of a suspension of metallic-like particles in a carrier fluid. We review some theories which have been developed to describe thermal convection in such fluids. Then we consider work of A.E. Green, F.R.S., and P.M. Naghdi who developed a new theory of continuum mechanics based on an entropy identity rather than an entropy inequality. In particular, within the framework of this theory they developed a new set of equations to describe viscous flow. The new theory additionally involves vorticity and spin of vorticity. We here develop the theory of Green and Naghdi to be applicable to thermal convection in a fluid in which is suspended a collection of minute metallic-like particles. Thus, we develop a non-Newtonian theory we believe capable of describing a nanofluid. Numerical results are presented for copper oxide or aluminium oxide particles in water or in ethylene glycol. Such combinations are used in real nanofluid suspensions.