Study of Newtonian and Non-Newtonian Fluids with a Focus on Ketchup as a Non-Newtonian Fluid and Its Applications

Fluids exhibit diverse behaviors under applied forces, classified broadly into Newtonian and Non-Newtonian fluids. Newtonian fluids have a constant viscosity regardless of applied stress, while Non-Newtonian fluids display viscosity variations based on stress conditions. This paper explores the fundamental differences between these fluid types, emphasizing the unique characteristics of Non-Newtonian fluids. Ketchup, a widely used food product, serves as a primary example of a shear-thinning Non-Newtonian fluid. This study delves into its rheological properties, flow behavior, and industrial applications, highlighting its relevance in food processing, packaging, and material science. Keywords: Newtonian fluids, Non-Newtonian fluids, Ketchup, Shear thinning, Rheology, Applications