Fundamentals of multiphase flows for process industries cover how materials like gases and liquids behave together in pipelines or reactors. These industries, such as oil and gas or chemical plants, rely on understanding how mixtures flow and interact. Factors like flow rates, pressure, and temperature are monitored to ensure safe and efficient operations. Models and experiments are used to predict how different phases—like gas and liquid—will move and separate within systems. Mastering these fundamentals is crucial for designing pipelines, refining processes, and managing resources effectively. It helps industries optimise production, reduce waste, and ensure that processes run smoothly while meeting environmental and safety standards. This book presents the complex subject of multiphase flow systems in the most comprehensible and easy to understand language. The topics covered in this extensive book deal with the core subjects of chemical engineering. It will serve as a valuable source of reference for those interested in this field.