👉 Differential fluid, also known as shear-thinning or pseudoplastic fluid, is a type of non-Newtonian fluid whose viscosity decreases with increasing shear rate. In simpler terms, when you apply more force or stress to the fluid—like stirring it or passing it through a pipe—the fluid becomes less resistant to flow. This means that the fluid flows more easily under higher shear conditions, such as when it's being agitated or pushed through a narrow channel. This property is common in many industrial and biological fluids, including certain paints, ketchup, blood, and polymer solutions.