A simplified method for calculating heat transfer coefficients and friction factors in laminar pipe flow of non-newtonian fluids

• Type: Article in International Scientific Journal
• Date: 2012

Authors

D. A. Cruz (Author) Other; P. M. Coelho (Author) FEUP; M. A. Alves (Author) FEUP

Journal

Title: JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME

Vol. 134 No. 9

Pages: 091703-1-091703-6

ISSN: 0022-1481

Publisher: ASME

Indexing

ISI Web of Knowledge - 12 Citations

ISI Web of Science

Scopus - 18 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Associated Projects

EXTENSION - EXTENSION – Escoamento extensional de fluidos complexos em microcanais

Other information

Authenticus ID: P-002-5M0

DOI: 10.1115/1.4006288

Abstract (EN): In this work, we propose an approximate methodology to estimate the Nusselt number and friction factor in fully developed non-Newtonian laminar flow in circular pipes for a constant wall heat flux. The methodology was tested using several constitutive equations, including generalized Newtonian fluids and viscoelastic models such as the simplified Phan-Thien-Tanner (sPTT), Herschel-Bulkley, Bingham, Casson, and Carreau-Yasuda constitutive equations. The error of the approximate methodology was found to be smaller than 3.2%, except for the fluids with yield stress for which the maximum error increased to about 8% for the cases analyzed, which cover a wide range of shear viscosity curves. [DOI: 10.1115/1.4006288]

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6