👉 Newtonian fluids are liquids whose viscosity remains constant regardless of the applied shear stress or shear rate. This means that when force is applied to these fluids, they flow in a predictable manner, behaving like a perfect fluid without any additional internal friction or resistance. Examples of Newtonian fluids include water, air, and most simple oils. In contrast to non-Newtonian fluids, which exhibit varying viscosity under different conditions, Newtonian fluids maintain a consistent flow behavior, making them easier to model and predict in various scientific and engineering applications.
