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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-05-10 and was most recently seen on 2026-05-10.
In continuum mechanics, a power-law fluid, or the Ostwald–de Waele relationship, is a type of generalized Newtonian fluid. This mathematical relationship is useful because of its simplicity, but only approximately describes the behaviour of a real non-Newtonian fluid. Power-law fluids can be subdivided into three different types of fluids based on the value of their flow behaviour index: pseudoplastic, Newtonian fluid, and dilatant. A first-order fluid is a power-law fluid with exponential dependence of viscosity on temperature. As a Newtonian fluid in a circular pipe has a quadratic velocity profile, a power-law fluid will result in a power-law velocity profile.
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