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    Modeling the natural convective flow of micropolar nanofluids

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    Type
    Article
    Authors
    Bourantas, Georgios
    Loukopoulos, Vassilios C.
    KAUST Department
    Applied Mathematics and Computational Science Program
    Biological and Environmental Sciences and Engineering (BESE) Division
    Physical Science and Engineering (PSE) Division
    Date
    2014-01
    Permanent link to this record
    http://hdl.handle.net/10754/563284
    
    Metadata
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    Abstract
    A micropolar model for nanofluidic suspensions is proposed in order to investigate theoretically the natural convection of nanofluids. The microrotation of the nanoparticles seems to play a significant role into flow regime and in that manner it possibly can interpret the controversial experimental data and theoretical numerical results over the natural convection of nanofluids. Natural convection of a nanofluid in a square cavity is studied and computations are performed for Rayleigh number values up to 106, for a range of solid volume fractions (0 ≤ φ ≤ 0.2) and, different types of nanoparticles (Cu, Ag, Al2O3 and TiO 2). The theoretical results show that the microrotation of the nanoparticles in suspension in general decreases overall heat transfer from the heated wall and should not therefore be neglected when computing heat and fluid flow of micropolar fluids, as nanofluids. The validity of the proposed model is depicted by comparing the numerical results obtained with available experimental and theoretical data. © 2013 Elsevier Ltd. All rights reserved.
    Citation
    Bourantas, G. C., & Loukopoulos, V. C. (2014). Modeling the natural convective flow of micropolar nanofluids. International Journal of Heat and Mass Transfer, 68, 35–41. doi:10.1016/j.ijheatmasstransfer.2013.09.006
    Publisher
    Elsevier BV
    Journal
    International Journal of Heat and Mass Transfer
    DOI
    10.1016/j.ijheatmasstransfer.2013.09.006
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ijheatmasstransfer.2013.09.006
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Applied Mathematics and Computational Science Program; Physical Science and Engineering (PSE) Division

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