THERMAL SCIENCE

International Scientific Journal

M. M. Rahman

,

Hakan F. Öztop

,

Rahman Saidur

,

S. Mekhilef

,

Khaled Al-Salem

UNSTEADY MIXED CONVECTION IN A POROUS MEDIA FILLED LID-DRIVEN CAVITY HEATED BY A SEMI-CIRCULAR HEATERS

ABSTRACT
A computational study has been performed on natural convection heat transfer and fluid flow in a porous media filled enclosure with semi-circular heaters by using finite element method. The ceiling of the cavity moves with a constant velocity and it is insulated. Temperature of vertical walls is lower than that of heaters. Results are presented via streamlines, isotherms, average Nusselt numbers and cross sectional velocity for different governing parameters such as Richardson number, Darcy number and dimensionless time. It is observed that both circulation of the flow and heat transfer is strongly affected with time increment and Darcy number inside the cavity.
KEYWORDS
porous media, lid-driven cavity, mixed convection, curvilinear heater
PAPER SUBMITTED: 2013-07-25
PAPER REVISED: 2014-07-16
PAPER ACCEPTED: 2014-08-19
PUBLISHED ONLINE: 2014-09-06
DOI REFERENCE: https://doi.org/10.2298/TSCI130725098R
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 5, PAGES [1761 - 1768]
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Unsteady mixed convection in a porous media filled lid-driven cavity heated by a semi-circular heaters

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