Pressure drop coefficient of laminar Newtonian flow in axisymmetric diffusers

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

Rosa, S (Autor) Outra; F. T. Pinho (Autor) Outra

Revista

Título: International Journal of Heat and Fluid Flow

Vol. 27

Páginas: 319-328

ISSN: 0142-727X

Editora: Elsevier

Indexação

ISI Web of Knowledge - 18 Citações

ISI Web of Science

Scopus - 26 Citações

Outras Informações

ID Authenticus: P-004-MF9

DOI: 10.1016/j.ijheatfluidflow.2005.09.003

Abstract (EN): The laminar flow of Newtonian fluids in axisymmetric diffusers has been numerically investigated to evaluate the pressure-loss coefficient as a function of Reynolds number, diffusion angle and expansion ratio. The numerical simulations were carried out with a finite-volume based code using non-orthogonal collocated grids and second order accurate differencing schemes to discretize all terms of the transport equations. The calculations were carried out for Reynolds numbers between 2 and 200, diffusion angles from 0 degrees to 90 degrees and expansion ratios of 1.5 and 2 and the data are presented in tabular form and as correlations. A simplified ID theoretical analysis helped explain the various contributions to the loss coefficient and its difference relative to the reversible pressure variation due to differences between the actual and fully developed friction losses, distortions of the velocity profiles and pressure non-uniformity upstream and downstream of the expansion section.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10