While still maintaining the emphasis on fundamental concepts with a mix of semianalytical, experimental, and numerical results, this book outlines their relevance to modeling and analyzing functional devices.The text has been divided into three main subject categories: gas flows; liquid flows; and simulation techniques .The majority of the completely new developments in this book are in liquid flows and simulation techniques chapters with modified information throughout the rest of the book.This book can be used in a two-semester graduate course. Also, selected chapters can be used for a short course or an undergraduate-level course. The book is suitable for graduate students and researchers in fluid mechanics, physics, and in electrical, mechanical and chemical engineering.