👉 A set fluid, often referred to as a set of fluids or simply fluids, is a collection of different types of liquids or gases that are physically mixed together and behave as a single, homogeneous substance. This mixture can exhibit properties that are intermediate between those of its individual components, such as density or viscosity. For example, a mixture of oil and water is a set fluid where the oil and water do not separate easily but can form a stable, uniform layer. The behavior of set fluids is governed by principles of fluid dynamics and thermodynamics, making them crucial in various scientific and engineering applications, from industrial processes to environmental studies.