👉 A tough fluid, also known as non-Newtonian fluid, is a complex substance that does not behave like traditional liquids or solids. Unlike water, which flows easily and has a consistent viscosity, tough fluids exhibit variable viscosity depending on the applied force or shear rate. When subjected to low stress, they behave more like a solid, resisting flow and deforming slowly. However, when the stress increases, they transition into a more fluid state, allowing them to flow and deform rapidly. This unique property makes them challenging to predict and control in various industrial applications, such as in the processing of polymers, blood flow in the human body, and even in certain types of paints and coatings.
