期刊
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
卷 130, 期 -, 页码 399-415出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2017.06.028
关键词
3D; Natural convection; Entropy generation; Nanofluid; Ahmed body
Entropy generation inside an inclined cubical differentially heated cavity filled with CNT-water nanofluid is evaluated numerically using FVM based on 3D vorticity-vector potential formalism. A conductive Ahmed body is incorporated at the center of the enclosure. The effects of several parameters such as Rayleigh number (10(3) <= Ra <= 10(5)), volumetric fraction (0 <= phi <= 0.05) of nanoparticles, angle of inclination of cavity (0 degrees <= a <= 180 degrees) and thermal conductivity ratio (0.01 <= R-c <= 100) on entropy generation are analyzed. The results are elucidated with local and total entropy generations and Bejan number. Entropy generation increases when Raleigh number increases due to buoyancy. Entropy declines when the inclination angle is increased up to 90, after that entropy generation surges. (C) 2017 Elsevier Ltd. All rights reserved.
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