👉 A semi-fluid, also known as a pseudoplastic or shear-thinning fluid, is a material that exhibits properties of both liquids and solids. Under normal conditions, these materials appear more like a solid due to their internal structure, but when subjected to shear stress, such as stirring or pumping, they flow more like a liquid. This behavior is due to the alignment and rearrangement of their internal particles or molecules, which reduces resistance to flow. Examples include ketchup, paint, and blood, where the fluid's viscosity decreases with increased shear rate. This unique characteristic makes semi-fluids useful in various applications, from industrial processes to everyday products.
