THERMAL SCIENCE

International Scientific Journal

Taher Armaghani

,

Abbas Kasaeipoor

,

Usef Mohammadpoor

ENTROPY GENERATION ANALYSIS OF MIXED CONVECTION WITH CONSIDERING MAGNETOHYDRODYNAMIC EFFECTS IN AN OPEN C-SHAPED CAVITY

ABSTRACT
This paper studies the effect of a constant magnetic field on the mixed convection heat transfer and the entropy generation of CuO-water nanofluid in an open C-shaped cavity with a numerical method. The governing equations are presented by control volume method and they are solved simultaneously by the SIMPLE algorithm. This study examines the effect of the Hartman number, aspect ratio, Reynolds number, and Richardson number parameters for different solid volume fraction of nanoparticles. Also Nusselt number, entropy generation, thermal performance criteria and coefficient of performance is studied in this research. The calculated parameters are the Hartman number, aspect ratio, Reynolds number, Richardson number, nanofluid solid volume fraction, Nusselt number, and coefficient of performance. The results show that increasing the Hartmann number reduces the entropy generation. However, the thermal performance increases. Increasing the aspect ratio raises heat transfer and thermal performance. The effects of nanofluid solid volume fraction on mixed convection heat transfer and entropy generation are also investigated and discussed.
KEYWORDS
nanofluid, magneto-hydrodynamic mixed convection, aspect ratio, entropy generation, thermal performance
PAPER SUBMITTED: 2017-12-13
PAPER REVISED: 2018-03-05
PAPER ACCEPTED: 2018-03-08
PUBLISHED ONLINE: 2018-04-28
DOI REFERENCE: https://doi.org/10.2298/TSCI171213112A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 6, PAGES [3455 - 3465]
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Entropy generation analysis of mixed convection with considering magnetohydrodynamic effects in an open C-shaped cavity

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