Seminar

Engineering HDR Seminar Series 2, 2013: Convective Transport Effects of Nanoparticle-Suspensions in Liquids

Mr Ting Tiew Wei, postgraduate student (Mechanical Engineering)


Date: 2013-01-30
Time: 11:00 to 12:00
Venue: Engineering Meeting Room 1, 5-4-22


Abstract

Nanofluids is a novel type of engineered colloids consisting of suspended solid nanoparticles whose size ranges from 1 nm to 100 nm. For the last two decades, research on nanofluids started to attract attention due to its notable enhanced heat transfer characteristics compared to those of the conventional fluid. Up to date, no satisfactory theoretical prediction can accurately explain the experimental behaviour of nanofluids. Most of the previous studies investigated the thermal conductivity of the nanofluids while studies on convective heat transfer are relatively scarce. This research aims to investigate the heat transfer enchancement of nanofluids in convective transport. Starting from the basic physical law, a theoretical model based on convective heat transport of nanofluid is developed. The effects of several parameters such as size and volume fraction of nanoparticle and type of base fluid on the convective heat transfer coefficient will be examined. Various slip mechanisms within the nanofluids such as the Brownian motion and thermophoresis will be incorporated into the investigation to derive explaination of the enhanced performance of nanofluids. The analysis would be then extended to the second-law analysis to investigate the characteristics of entropy generation in nanofluidic flow. In addition, the field synergy principle will be applied to study the effect of the synergetic relation between velocity field and heat-flux field on the heat transfer enhancement in the nanofluidic flow. Preliminary results show that the streamwise conduction which is significant in small Peclet-number flows is greatly amplified when nanofluid is used instead of conventional fluid. On the other hand, the internal heat generation due to viscous dissipation decreases at high Peclet-number region.

About the Speaker

Ting Tiew Wei received his BEng (Hons) degree with first class honors in Mechanical engineering from Multimedia University, Malaysia in 2011. He joined Monash University for postgraduate studies in year 2012 under the supervision of Dr. Hung Yew Mun and Prof. Anthony Guo Ning Qun. His research focus is on the analysis of heat transfer enhancement of nanofluids in convective transport.