• theoretical conjugate heat transfer analysis in a parallel flat plate microchannel under electro-osmotic and pressure forces with a phan-thien-tanner fluid

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 713
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     in this paper we solve, numerically and asymptotically, the steady-state analysis of a conjugate heat transfer process in an electro-osmotic and fully developed laminar flow including joule heating effects. in addition, the viscoelastic fluid obeys the simplified phan-thien-tanner (sptt) constitutive equation. taking into account the finite thermal conductivity of the micro-channel wall, the dimensionless temperature profiles in the fluid and solid wall have been obtained as functions of the dimensionless parameters involved in the analysis: a conjugate parameter, α  , which represents the competition between the longitudinal conductive heat in the micro-channel wall to the convective heat transfer in the fluid; dek2, a parameter that describes the viscoelastic behavior of the fluid; the well-known peclet number, pe; a normalized power generation term, λ, being the ratio of heat flux from the external wall to the joule heating (and smaller or equal to unity); the ratio of pressure to the electro-osmotic forces, γ; and the aspect ratios of the micro-channel and the solid wall, β and ɛ, respectively. the results for the temperature fields, in the fluid and micro-channel wall show a strong dependence of the above dimensionless parameters, therefore, this set of parameters controls directly the thermal performance of this micro-channel model.

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