👉 The Robertson fluid is a theoretical model of a non-Newtonian fluid that exhibits shear-thinning behavior, meaning its viscosity decreases with increasing shear rate. This fluid is named after Donald A. Robertson, who first described it in the context of understanding complex fluids. Unlike simple Newtonian fluids, which have a constant viscosity regardless of applied stress, the Robertson fluid's viscosity is dependent on the rate at which it is deformed. At low shear rates, it behaves more like a liquid with higher viscosity, but as the shear rate increases, its viscosity drops, allowing it to flow more easily. This property makes the Robertson fluid particularly useful in modeling and understanding the behavior of biological fluids, such as blood, and other complex materials that do not follow simple linear relationships between stress and strain rate.
