1st+article+last+submission.pdf (12.59 MB)
Download file

Effects of linearly heated left wall on natural convection within a superposed cavity filled with composite nanofluid-porous layers

Download (12.59 MB)
journal contribution
posted on 08.02.2019, 13:34 by BM Al-Srayyih, S Gao, SH Hussain
The effect of a linearly heated left sidewall on natural convection flows in a cavity filled with nanofluid-superposed porous layers is investigated numerically using the Galerkin finite element method. Two cases, which use the vertical and horizontal directions for the porous–nanofluid layers, are considered to investigate the natural convection in the flow inside a square enclosure. In both cases, the left wall is linearly heated, whereas the right wall is isothermally cooled. The horizontal walls are assumed to be thermally insulated. The Darcy–Brinkmann model is used to solve the governing equations in the porous layer. The results show that the nanofluid produces more enhancement of heat transfer compared to the base fluid. Increasing the Rayleigh number (Ra) values caused the intensity of the streamlines in case 2 to be stronger than that in case 1. Lower values of the thermal conductivity ratio (Kr) imply greater heat transfer enhancement than for the high thermal conductivity ratios. At the low values of the thermal conductivity ratio (Kr<1) and Darcy number values (Da < 10-3), the heat transfer is more enhanced for case 2 compared to case 1 while higher Darcy number produced case 1 overcome case 2.

Funding

This study was financially supported by the Iraqi Ministry of Higher Education and Scientific Research and the Babylon University.

History

Citation

Advanced Powder Technology, 2019, 30 (1), pp. 55-72

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Version

AM (Accepted Manuscript)

Published in

Advanced Powder Technology

Publisher

Elsevier

issn

0921-8831

eissn

1568-5527

Acceptance date

08/10/2018

Copyright date

2018

Available date

28/10/2019

Publisher version

https://www.sciencedirect.com/science/article/pii/S0921883118306757?via=ihub

Notes

The file associated with this record is under embargo until 12 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.

Language

en

Usage metrics

Categories

Keywords

Exports