👉 The "must fluid" refers to a type of highly viscous, non-Newtonian fluid that behaves as if it is both a liquid and a solid under certain conditions. It exhibits shear-thinning properties, meaning its viscosity decreases as the applied stress or shear rate increases. This fluid can flow easily when subjected to low stress but becomes extremely resistant to flow when subjected to high stress, often due to the alignment of its internal structure. Common examples include certain types of blood, ketchup, and some industrial fluids, where the fluid's ability to maintain shape under pressure is crucial for its function.
