Author(s): Enzo O. Macagno; Tin-Kan Hung

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Abstract: The accelerated flow of a viscous fluid due to a suddenly established discharge in a two-dimensional conduit expansion has been determined by numerical integration of the governing differential equation. The complete form of the equation for diffusion and convection of vorticity was employed. The Reynolds number of the flow, based on the prescribed disharge, was 200. The growth of the separation zone, assuming symmetric flow, was determined. Flow and vorticity pattern were calculated at short interval of time; a selection of those pattern is presented, as well a curves showing the variation with time of the principal kinematic characteristics of the unsteady flow through the expansion.

DOI: https://doi.org/10.1080/00221687009500291

Year: 1970