The book reports a part of results of a long term experimental project devoted to investigating single-phase flow pressure drop and heat transfer, flow boiling pressure drop and heat transfer, flow boiling instability and flow visualization of de-ionized water flow in microchannels. However, the main focus in this book is to present experimental results for single-phase flow and heat transfer characteristics in rectangular microchannels.The authors is encouraged to write this book because of noticed discrepancies between published results and conventional theory. The single-phase fluid flow...