👉 A linear fluid, also known as an incompressible fluid, is a type of fluid whose density remains constant regardless of the applied pressure or volume changes. This means that when a linear fluid is compressed or expanded, its density does not change; it only adjusts its volume proportionally. Examples of linear fluids include water, air, and most gases under certain conditions. This property makes linear fluids particularly important in various engineering applications, such as fluid dynamics and hydraulic systems, where predictable behavior under different conditions is crucial.
