Pressure drop coefficient of laminar Newtonian flow in axisymmetric diffusers

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Rosa, S (Author) Other; F. T. Pinho (Author) Other

Journal

Title: International Journal of Heat and Fluid Flow

Vol. 27

Pages: 319-328

ISSN: 0142-727X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 18 Citations

ISI Web of Science

Scopus - 26 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10