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Author(s): Adélio Cavadas
Fernando Tavares de Pinho
João Campos
Title: Numerical investigation of the flow field in confined impinging jets of power law fluids
Issue Date: 2007
Abstract: A numerical investigation was carried out to characterize the isothermalflow in a confined impinging jet emanating from a rectangular duct of aspect-ratio equalto 13. After impinging a flat plate the flow separated in two streams that were confined bytwo slopping plane walls, each making an angle of 12° relative to the plate. The fluidswere Newtonian and purely viscous non-Newtonian, the latter described by a power lawmodel. The numerical simulation was carried out with a finite-volume based code usingnon-orthogonal collocated grids and second order accurate differencing schemes todiscretize all terms of the transport equations. The flow characteristics were studied as afunction of shear-thinning intensity for Reynolds numbers between 10 and 800.Specifically, we investigate in detail the pressure loss in the cell and the size of therecirculation zone attached to the sloping surfaces of the cell after validation of thenumerical simulations against experimental Newtonian and non-Newtonian data. Threedimensional effects due to the finite span of the rectangular duct and cell are alsoevaluated.
Source: Métodos Numéricos e Computacionais em Engenharia
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: openAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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