Virginia TechWatson, Layne T.Wang, Chang Y.2014-04-242014-04-241979Watson, L. T.; Wang, C. Y., "deceleration of a rotating disk in a viscous fluid," Phys. Fluids 22, 2267 (1979); http://dx.doi.org/10.1063/1.8625351070-6631http://hdl.handle.net/10919/47616A disk rotating in a viscous fluid decelerates with an angular velocity inversely proportional to time. It is found that the unsteady Navier–Stokes equations admit similarity solutions which depend on a nondimensional parameter S =α/Ω0, measuring unsteadiness. The resulting set of nonlinear ordinary differential equations is then integrated numerically. The special case of S =−1.606 699 corresponds to the decay of rotation of a free, massless disk in a viscous fluid.application/pdfen-USIn CopyrightArticle - Refereedhttp://scitation.aip.org/content/aip/journal/pof1/22/12/10.1063/1.862535https://doi.org/10.1063/1.862535