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Modeling of Rayleigh–Bénard natural convection heat transfer in nanofluids

Elhajjar, Bilal and Bachir, Glades and Mojtabi, Abdelkader and Fakih, Chakib and Charrier-Mojtabi, Marie-Catherine Modeling of Rayleigh–Bénard natural convection heat transfer in nanofluids. (2010) Comptes Rendus Mécanique, 338 (6). 350-354. ISSN 1631-0721

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Official URL: http://dx.doi.org/10.1016/j.crme.2010.07.008


Heat transfer in Rayleigh–Bénard convection is investigated for three types of nanofluid. Instead of using the expressions commonly found in the literature for specific heat capacity and thermal expansion coefficient, we used two relations that are in agreement with the laws of thermodynamics. The influence of nanoparticles on conductive and convective heat transfer is studied. It is shown that adding nanoparticles in a fluid delays the onset of convection. Contrary to what is argued by many authors, we prove by direct numerical simulations that the use of nanofluids can reduce heat transfer instead of increasing it.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S1631072110001026?via=ihub
HAL Id:hal-00965752
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Lebanese University - LU (LEBANON)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:25 Mar 2014 15:12

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