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Thermal Instability analysis of an elastico-viscous nanofluid layer

  • Identification data

    Identifier: imarina:5132355
    Handle: https://hdl.handle.net/20.500.11797/imarina5132355
    Authors:
    Chand RRana GPuigjaner D
    Abstract:
    The purpose of this paper is to study the thermal instability analysis of an elastico-viscous nanofluid layer heated from below. The Rivlin-Ericksen type fluid model is used to describe the rheological behavior of an elastico-viscous nanofluid. The linear stability criterion for the onset of both stationary and oscillatory convection is derived by applying the normal model analysis method. The presence of nanoparticles enhances the thermal conductivity of the fluid, and the model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The effect of the physical parameters of the system, namely the concentration Rayleigh number, Prandtl number, capacity ratio, Lewis number, and kinematic visco-elasticity coefficient, on the stability of the system is numerically investigated. In addition, sufficient conditions for the non-existence of oscillatory convection are reported.

  • Others:

    Author, as appears in the article.: Chand R; Rana G; Puigjaner D
    Department: Enginyeria Informàtica i Matemàtiques
    URV's Author/s: Puigjaner Riba, Maria Dolores
    Keywords: Viscoelasticity Vis-coelasticity Thermal instability Rivlin-ericksen fluid Oscillatory convection Nanofluid
    Abstract: The purpose of this paper is to study the thermal instability analysis of an elastico-viscous nanofluid layer heated from below. The Rivlin-Ericksen type fluid model is used to describe the rheological behavior of an elastico-viscous nanofluid. The linear stability criterion for the onset of both stationary and oscillatory convection is derived by applying the normal model analysis method. The presence of nanoparticles enhances the thermal conductivity of the fluid, and the model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The effect of the physical parameters of the system, namely the concentration Rayleigh number, Prandtl number, capacity ratio, Lewis number, and kinematic visco-elasticity coefficient, on the stability of the system is numerically investigated. In addition, sufficient conditions for the non-existence of oscillatory convection are reported.
    Thematic Areas: General engineering Engineering (miscellaneous) Engineering (all)
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: dolors.puigjaner@urv.cat
    Author identifier: 0000-0001-5251-2022
    Record's date: 2023-02-18
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://et.ippt.pan.pl/index.php/et/article/view/401
    Papper original source: Engineering Transactions. 66 (3): 301-324
    APA: Chand R; Rana G; Puigjaner D (2018). Thermal Instability analysis of an elastico-viscous nanofluid layer. Engineering Transactions, 66(3), 301-324. DOI: 10.24423/EngTrans.401.20180928
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.24423/EngTrans.401.20180928
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2018
    Publication Type: Journal Publications

  • Keywords:

    Engineering (Miscellaneous)
    Viscoelasticity
    Vis-coelasticity
    Thermal instability
    Rivlin-ericksen fluid
    Oscillatory convection
    Nanofluid
    General engineering
    Engineering (miscellaneous)
    Engineering (all)

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