👉 The Casey fluid, also known as the Casey liquid or Casey's solution, is a viscous, colorless liquid historically used in various scientific experiments and as a model for non-Newtonian fluids. Discovered and characterized by George Casey in the early 20th century, it exhibits unique properties where its viscosity changes under applied shear stress. When subjected to gentle forces, the fluid becomes less viscous and flows more freely, resembling a liquid. However, under greater stress, it thickens and behaves like a solid, resisting flow until released. This dual behavior makes the Casey fluid an ideal model for studying complex fluid dynamics and has applications in fields such as materials science, biophysics, and industrial processes.
