Estimating Heat Transfer Coefficients and Friction Factors in Non-Newtonian Flows between Parallel Plates

• Type: Article in International Scientific Journal
• Date: 2019-02-27

Authors

Mauro Mendes (Author) Other; Manuel A. Alves (Author) FEUP; P. M. Coelho (Author) FEUP

Journal

Title: Heat Transfer Engineering

Vol. 40

Pages: 549-558

ISSN: 0145-7632

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 0 Citations

Other information

Authenticus ID: P-00Q-KT6

DOI: 10.1080/01457632.2018.1436417

Abstract (EN): A simplified method, successfully tested previously for flow in circular pipes, is used in this work to estimate the friction factor and Nusselt number in fully-developed laminar flow between parallel plates of non-Newtonian fluids. Both constant wall temperature and constant wall heat flux cases are considered. The methodology was tested using several constitutive equations, including generalized Newtonian fluids, such as the Herschel-Bulkley, Bingham, Casson, and Carreau-Yasuda models, and also the simplified Phan-Thien-Tanner viscoelastic model. The error of the approximate methodology was found to be small, below 3.4%, except for the fluids with yield stress for which the maximum error increased to 8.4% for the cases analyzed, which cover a wide range of shear viscosity curves.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10