👉 Miscellaneous fluids, often referred to as non-Newtonian or complex fluids, are substances that do not behave like simple liquids or gases under standard conditions. Unlike Newtonian fluids, which have a constant viscosity regardless of applied shear stress (think of water or air), miscellaneous fluids exhibit varying viscosities depending on the force applied to them. This can result in behaviors such as shear-thinning (where viscosity decreases with increased shear rate, like ketchup), shear-thickening (where viscosity increases with shear rate, like cornstarch mixed with water), or even thixotropy (where viscosity decreases over time under constant shear). These fluids are found in various natural and industrial contexts, including biological systems, paints, and food products, and their unique properties make them essential in numerous applications where traditional fluid dynamics do not fully apply.
