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ANALYSIS OF NATURAL CONVECTION OF Cu AND TiO2 NANOFLUIDS INSIDE NONCONVENTIONAL ENCLOSURES
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ABSTRACT
Steady-state laminar natural convection of Cu and TiO2 nanofluids inside different enclosures is numerically investigated. Natural convection is concerned due to a temperature difference between the hot and cold surfaces. The Boussinesq approximation is used to form the governing equations, and the commercial software package ANSYS FLUENT version 14.0 is used to numerically solve the governing equations. The temperature profiles and flow patterns at different Rayleigh numbers, such as 104, 105, and 106, are studied and compared for different curved geometries that are 1/8, 2/8, and 3/8 of the height of the enclosure. Heat transfer coefficients are presented for enclosures with different nanofluid concentrations. The nanoparticles enhance the heat transfer, and the heat transfer enhancement increases with increasing nanoparticle concentrations. A new curved enclosure is suggested to augment heat transfer.
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Yang Jiawang, Yang Xian, Wang Jin, Chin Hon Huin, Sundén Bengt, Review on Thermal Performance of Nanofluids With and Without Magnetic Fields in Heat Exchange Devices, Frontiers in Energy Research, 10, 2022. Crossref
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Mousavi Ajarostaghi Seyed Soheil, Zaboli Mohammad, Javadi Hossein, Badenes Borja, Urchueguia Javier F., A Review of Recent Passive Heat Transfer Enhancement Methods, Energies, 15, 3, 2022. Crossref