Non-Newtonian Fluid

A non-Newtonian fluid is a type of fluid whose viscosity, or thickness, changes depending on how much force or stress is applied to it. Unlike water or oil, which have constant viscosity regardless of movement, non-Newtonian fluids can become thicker or thinner when stirred, shaken, or poured. For example, ketchup becomes more resistant when shaken but flows easily when poured, while oobleck (a mix of cornstarch and water) acts solid under quick force but flows slowly when gentle. This unique behavior arises from their complex internal structures and interactions between particles.