👉 Partial fluid, also known as non-Newtonian fluid, is a type of fluid whose viscosity changes with the applied shear rate or stress. Unlike Newtonian fluids, such as water or air, whose viscosity remains constant regardless of the force applied, partial fluids exhibit varying viscosity. This means that when a shear stress is applied, the fluid's resistance to flow changes; it can become less viscous (more fluid-like) under high shear rates, like when shaken or stirred, and more viscous (less fluid-like) under low shear rates, such as when at rest or slowly flowing. This property is commonly observed in materials like ketchup, blood, and certain polymer solutions, where the fluid's behavior is influenced by factors such as temperature, shear rate, and concentration.
