STUDY ON NONLINEAR ELASTICO-VISCOUS PULSATILE NANOFLUID SLIP FLOW OVER POROUS CHANNEL STRETCHING SHEET

Abstract

In 1959, Richard Feynman, a renowned physicist, shared the idea of micro-machines at the yearly American Physical Society meeting. Today, it is worth reconsidering these forecasts to see that reality has exceeded imagination. Conversely, this journey to today’s ultrathin devices is not expected to continue unabated. Already, designers of mechanics, electronic and computer devices are feeling the bottleneck they have reached. Unexpectedly, the bottleneck is not electronic or mechanical but thermal. The movement towards machines that operate at increasing speed results in greater and greater heat flow. Remarkably, the problem of heat dissipation is not only a microscale but also a macroscale issue. The problem of heat transfer is similar in controlled bioreactors, high- and medium-temperature fuel cells, and large transport vehicles. Consequently, the cooling requirements of cutting-edge technologies necessitate a radical new approach at this pivotal moment in heat transfer technology’s history. Because refrigerants are such poor heat conductors, all previous efforts to develop cooling technology have been, in a nutshell, "penny wise and pound stupid." This is because, while every effort has been made to advance transport processes. This inherent insufficiency of coolants indicates that it is expected that the current level of heat removal can be significantly improved by designing more conductive fluids. Particles in nanofluids are so small and make up such a small percentage of the total volume that they don’t interact with one another, so they’re completely stable and don’t cause any issues with heat transfer. This finding sparked a flurry of research in the area, with scientists primarily using experimentation to back up the huge potential of nanofluids and also making theoretical attempts to explain the phenomenon. The enthusiasm of the research community in the nanofluid area was evident from the number of papers published. The main focus of the current research is on nanofluids. Some relevant articles or kinds of literature, which are studied, explored and reviewed cautiously, have been arranged in Chapter 1. Some elementary information and introductory text have been incorporated in Chapter 2 describing non-Newtonian nanofluids, giving an adequate background in these areas. The other important issue is the incorporation of basic numerical techniques to solve BVPs. The rest of chapters 3-6 are the discussions of some nanofluid models incorporating nonNewtonian viscoelastic phenomena. The large number of references related to this thesis has been organised as an appendix which can assist as a glossary for the research community.