A Study on Enhancement of Heat Transfer Rate by the Aid of Nanofluids

        A study on enhancement of heat transfer rate by the aid of nanofluids

Abstract:

                 This project titled “A study on enhancement of heat transfer rate by the aid of nanofluids ” explores several methods to improve the heat transfer efficiency. Some of the methods are utilization of extended surfaces, application of vibration to the heat transfer surfaces and usage of micro channels. Heat transfer efficiency can also be improved by increasing the thermal conductivity of the working fluid. Commonly used heat transfer fluids such as water,ethylene glycol, and engine oil have relatively low thermal conductivities,when compared to the thermal conductivity of solids. High thermal conductivity of solids can be used to increase the thermal conductivity of a fluid by adding small solid particles to that fluid. Many researchers  have  proposed different heat transfer techniques to increase the efficiency of the heat transfer systems. After the invention of high accuracy microscopes like Scanning Electron Microscope (SEM), Transfer Electron Microscope (TEM) etc the researchers are trying to synthesize the materials in nanometer size. Over the past few decades there has been remarkable increase in interest in nanotechnology among the science and engineering communities. In this process we have come to know procedure for preparing a nanofluid which is a suspension consisting of nanophase powders and a base liquid, Some of the properties such as the density,melting point, dimensions, shapes and other  properties of the nanoparticles are discussed and in this project heat transfer coefficient of various nanofluids and factors influencing heat transfer rate  and the variation of average tool flank wear, surface roughness of the machined surface and cutting tool temperature with cutting speed and feed are to be studied with nano solid lubricant suspensions in coconut oil.