Analysis of forced convection in pipes and channels with the simplified Phan-Thien-Tanner fluid

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Fernando Tavares de Pinho (Author) FEUP; P. J. Oliveira (Author) Other

Journal

Title: International Journal of Heat and Mass Transfer

Vol. 43 No. 13

Pages: 2273-2287

ISSN: 0017-9310

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 73 Citations

ISI Web of Science

Scopus - 82 Citations

Other information

Authenticus ID: P-000-ZM4

DOI: 10.1016/s0017-9310(99)00303-8

Abstract (EN): Analytical solutions are derived for the temperature distribution and heat transfer coefficient in forced convection of a viscoelastic fluid obeying the simplified Phan-Thien-Tanner constitutive equation in laminar pipe and plane channel flows. The results are valid for fully developed thermal and hydrodynamic flow conditions with a constant heat flux imposed at the wall and include the investigation of the effects of viscous dissipation. A nonvanishing value of the extensional parameter of the fluid model is shown to be essential for the solution to differ significantly from that for a Newtonian, or an elastic fluid without extensibility. Elasticity, only when combined with extensibility, is shown to increase the heat transfer and to reduce the range of temperatures present inside a duct. These beneficial effects of fluid elasticity are enhanced by viscous dissipation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15