Heat and Mass Transfer Analysis in Modelling Laminar Boundary Layer Nanofluid Flow with Nanoparticle Electrification

Abstract

ABSTRACT newlineNanofluid flows are of major importance in industrial sectors including power generation, transportation, nuclear reactors, thermal therapy for cancer treatment, micro manufacturing, metallurgical and chemical sectors, as well as cooling, heating and air conditioning and also of great economic, social and environmental importance due to their application in many practical fields of science, engineering and technology. Problems concerned with thermal management are some of the areas where the dynamics of nanofluids play a prominent role. Boundary layer flow analysis over some well-known solid surfaces, such as, flat plate, stretching sheet or stretching cylinder problems have a wide range of applications, such as nuclear reactors cooled during an emergency shutdown, electronic devices cooled by fans, gradual cooling of continuous stretched metal or plastic strips, cooling of an infinite metallic plate in a cooling bath, paper production and coating of cylindrical wires. The literature on the study of boundary layer flow and improvement of heat transfer characteristics of nanofluids scanty and many gaps do exist in the literature. To cite a few the effects of different boundary shapes on the characteristics of flow of nanofluid is still unexplored to the fullest extent. Also the effect of electrification of nanoparticles mechanism has not been attempted in any previous study on modelling of nanofluid flow. The present investigation is an attempt to study the effect of electrification of nanoparticles mechanism in the modelling of boundary layer flow with heat and mass transfer of a nanofluid. newlineThe pioneering work presented by Choi (1995) suggests that nanofluids can constitute an interesting alternative for advanced applications in heat transfer. Buongiorno (2006) identified multiple mechanisms in the convective transport in nanofluids using a two-phase non-homogeneous model including inertia, Brownian diffusion, thermophoresis, diffusiophoresis, the magnus effect, fluid drainage and gravity and he found on