The fluid which contains nanometer-sized particles is termed as a nanofluid. The area of thermal engineering which is concerned with the generation, use, conversion and exchange of heat between physical systems is known as heat transfer. The net movement of mass from one location such as, stream, phase, fraction or component, to another is termed as mass transfer. Nanofluid heat and mass transfer are studied under the field of chemical engineering. The bigger the surface area of nanoparticles, the more is the heat transfer. The increased heat transfer and the micro-convection increases the dispersion of heat in the fluid at a faster rate. With the rise in temperature, the thermal conductivity of nanofluids increases significantly. Due to Brownian motion of suspended nanoparticles, mass transport is promoted by the presence of nanoparticles, inside the nanofluid. Nanofluid heat and mass transfer are studied under the field of chemical engineering. The various studies that are constantly contributing towards advancing technologies and evolution of this field are examined in detail. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included herein. Those in search of information to further their knowledge will be greatly assisted by this book.