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Type: Artigo de periódico
Title: A numerical solution for the entrance region of non-newtonian flow in annuli
Author: Maia, M.C.A.
Gasparetto, C.A.
Abstract: Continuity and momentum equations applied to the entrance region of an axial, incompressible, isothermal, laminar and steady flow of a power-law fluid in a concentric annulus, were solved by a finite difference implicit method. The Newtonian case was solved used for validation of the method and then compared to reported results. For the non-Newtonian case a pseudoplastic power-law model was assumed and the equations were transformed to obtain a pseudo-Newtonian system which enabled its solution using the same technique as that used for the Newtonian case. Comparison of the results for entrance length and pressure drop with those available in the literature showed a qualitative similarity, but significant quantitative differences. This can be attributed to the differences in entrance geometries and the definition of asymptotic entrance length.
Subject: annular geometries
finite differences
Editor: Brazilian Society of Chemical Engineering
Rights: aberto
Identifier DOI: 10.1590/S0104-66322003000200014
Date Issue: 1-Jun-2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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