ABSTRACT
A single-phase flow contains either a single liquid or gas without solids in it, or without any other immiscible liquid or gas. The flows of water, oil, natural gas, air, etc. are all examples of single-phase flow. A liquid with dissolved gas or another dissolved liquid, or with homogeneous suspension of very fine particles of solids, can be considered and treated as a single-phase flow, although in reality two phases are involved. A single-phase incompressible flow is a homogeneous flow, whereas a multiphase incompressible flow is not homogeneous. The most common type of flow encountered in engineering practice is single-phase incompressible flow of Newtonian fluid – a subject treated in ordinary fluid mechanics. Most single-phase fluids encountered in engineering practice, such as air, water, and oil, are Newtonian fluids. The most common type of flow encountered in engineering practice is single-phase incompressible flow of Newtonian fluid – a subject treated in ordinary fluid mechanics.
