What is Newtonian fluid?
{{Continuum mechanics}} A '''Newtonian fluid''' is a [[fluid]], where the ratio between [[shear stress]] changes linearly in proportion to the stress it is exposed to. This proportion is known as [[viscosity]]. Note that the inverse is not true; there are fluids with constant viscosity, that are [[Non-Newtonian fluid]]s: one example is the [[Boger fluid]]. {{science-stub}} [[Category:Fluid mechanics]]