Abstract:
The concept of nanofluids refers to a new kind of heat transport fluids by
suspending nano scaled metallic or nonmetallic particles in base fluids. The
experimental results showed that the suspended nanoparticles increased convective
heat transfer coefficient of the fluid.
The properties and behavior of a nanofluid depend on a number of parameters
including the properties of the base liquid and the dispersed phases, particle
concentration, particle size and morphology, as well as the presence of dispersants
and/or surfactants. From a macroscopic view, the properties of homogenous
nanofluids that affect the heat transfer behavior include heat capacity, thermal
conductivity, density and viscosity.
Natural convective heat transfer is affected by a number of processes in parallel
and/or series, including unsteady state heat conduction through the heating wall,
conduction within the boundary layer and its development, as well as convection due
to the variation of liquid density and the density difference between the nanoparticles
and the liquid.
In this experimental study, natural heat transfer of Nanofluid will be
investigated. Nanofluid with different volume percentage will be put between walls
of the cavity, and the natural heat transfer will be observed. As a result of the
experimental readings, Nusselt number as a function of Rayleigh number (i.e. Nu= c
Raⁿ) will be obtained.
Description:
Master of Science in Mechanical Engineering. Thesis (M.S.)--Eastern Mediterranean University, Faculty of Engineering, Dept. of Mechanical Engineering, 2010. Supervisor: Prof. Dr. Hikmet S. Aybar.
