This is a concise book written exclusively based on post - doctoral fellowship thermal/mechanical research work. It contains chapters on – heat transfer, electronic component cooling, nanoparticles and nanofluids preparation, heat transfer and pressure drop characteristics of various nanofluids in a thin channelled heat sink and also in an electronic heat sink fitted with dynamic mixers.It also contains appendices on - calibration curves and uncertainty analysis, test data of thin channelled heat sink and heat sink fitted with dynamic mixer. This book is backed by huge number of references and each reference bears its citation inside various chapters. This book is useful to readers interested in experimenting heat transfer, ie, BE, BTech, ME, MTech, MS, PhD and ScD.