THERMAL SCIENCE

International Scientific Journal

Nader Pourmahmoud

,

Ashkan Ghafouri

,

Iraj Mirzaee

NUMERICAL COMPARISON OF VISCOSITY MODELS ON MIXED CONVECTION IN DOUBLE LID-DRIVEN CAVITY UTILIZED CUO-WATER NANOFLUID

ABSTRACT
Laminar incompressible mixed-convective heat transfer in two-dimensional lid-driven cavity, filled with nanofluid CuO-water, is studied numerically. Eight different viscosity models are compared to investigate the enhancement in the heat transfer and the increase in the average Nusselt number. The point of view of each model essentially differs in terms of whether it takes various parameters such as temperature effects, Brownian motion of the nanoparticles, the radii of aggregated particles, and the volume-fraction of nanoparticles into account or not. The governing stream-vorticity equations are solved using a second order central finite difference scheme, coupled to the conservation of mass and energy. The main sensitive parameters of interest to investigate the viscosity models are chosen as volume fraction of the nanoparticles φ, and Richardson number Ri. The performance study of the viscosity models and the interpretation of the corresponding results of velocity components are done in a different range of φ and Ri.
This article has been corrected with 10.2298/TSCI160418084E.
KEYWORDS
nanofluid, viscosity model, mixed convection, lid-driven cavity, Heat Transfer Enhancement
PAPER SUBMITTED: 2013-03-09
PAPER REVISED: 2014-03-20
PAPER ACCEPTED: 2014-04-14
PUBLISHED ONLINE: 2014-05-04
DOI REFERENCE: https://doi.org/10.2298/TSCI130309048P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 1, PAGES [347 - 358]
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Numerical comparison of viscosity models on mixed convection in double lid-driven cavity utilized CuO-water nanofluid

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