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  • Open Access

    ARTICLE

    Mixed Convection in a Lid-Driven Square Cavity With Heat Sources Using Nanofluids

    Ilhem Zeghbid1, Rachid Bessaïh1

    FDMP-Fluid Dynamics & Materials Processing, Vol.13, No.4, pp. 251-273, 2017, DOI:10.3970/fdmp.2017.013.251

    Abstract This paper presents a numerical study of two-dimensional laminar mixed convection in a lid-driven square cavity filled with a nanofluid and heated simultaneously at a constant heat flux q” by two heat sources placed on the two vertical walls. The movable wall and the bottom wall of the cavity are maintained at a local cold temperature TC, respectively. The finite volume method was used to solve the equations of flow with heat transfer across the physical domain. Comparisons with previous results were performed and found to be in excellent agreement. Results were presented in terms of… More >

  • Open Access

    ARTICLE

    Mixed Convection of Nanofluids inside a Lid-Driven Cavity Heated by a Central Square Heat Source

    Fatima-zohra Bensouici1, *, Saadoun Boudebous2

    FDMP-Fluid Dynamics & Materials Processing, Vol.13, No.3, pp. 189-212, 2017, DOI:10.3970/fdmp.2017.013.189

    Abstract A numerical work has been performed to analyze the laminar mixed convection of nanofluids confined in a lid driven square enclosure with a central square and isotherm heat source. All the walls are cooled at constant temperature, and the top wall slides rightward at constant velocity. The simulations considered four types of nanofluids (Cu, Ag, Al2O3 and TiO2)-Water. The governing equations were solved using finite volume approach by the SIMPLER algorithm. Comparisons with previously published work are performed and found to be in good agreement. The influence of pertinent parameters such as Richardson number, size of… More >

  • Open Access

    ARTICLE

    Cooling of electronic components using nanofluids

    M. Zitoune1, 2 , O. Ourrad Meziani2, B. Meziani2, M. Adnani1, 2

    FDMP-Fluid Dynamics & Materials Processing, Vol.12, No.1, pp. 33-55, 2016, DOI:10.3970/fdmp.2016.012.033

    Abstract A finite volume code used for detailed analysis of forced-convection flow in a horizontal channel containing eight heat sources simulating electronic components. The study deals the effect of variations of Reynolds number, the volume fraction and the good choice of type of nanoparticles added to the base fluid. The study shows that the rate of heat transfer increases with increasing Reynolds number and the volume fraction of nanofluids but not infinitely. The analysis of the dynamic and thermal field shows that the heat transfer is improved, with the increase in the Reynolds number and the More >

  • Open Access

    ARTICLE

    Natural Convection in a Square Cavity Filled with Nanofluids

    Abd el malik Bouchoucha1,2, Rachid Bessaïh1

    FDMP-Fluid Dynamics & Materials Processing, Vol.11, No.3, pp. 279-300, 2015, DOI:10.3970/fdmp.2015.011.279

    Abstract The present paper deals with a numerical study of natural convection in a square cavity filled with a nanofluid. The left and right vertical walls of the cavity are maintained at a local temperature Th (heat source) and a local cold temperature TC, respectively. Horizontal walls are assumed to be adiabatic. The governing equations are discretized by using the finite volume method and solved by the SIMPLER algorithm. Our computer fortran code is validated through comparison with numerical results found in the literature. Results are presented in terms of streamlines, isotherms, local and average Nusselt numbers More >

  • Open Access

    ARTICLE

    Optimal Formulation of Nanofluids for Maximum Free Convection Heat Transfer from Horizontal Isothermal Cylinders

    Massimo Corcione1

    FDMP-Fluid Dynamics & Materials Processing, Vol.7, No.2, pp. 175-200, 2011, DOI:10.3970/fdmp.2011.007.175

    Abstract Free convection heat transfer in nanofluids from horizontal isothermal cylinders is investigated theoretically. The main idea upon which the present work is based is that nanofluids behave more like a single-phase fluid rather than like a conventional solid-liquid mixture. This assumption implies that all the convective heat transfer correlations available in the literature for single-phase flows can be extended to nanoparticle suspensions, provided that the thermophysical properties appearing in them are the nanofluid effective properties calculated at the reference temperature. In this connection, two empirical equations, based on a wide variety of experimental data reported… More >

  • Open Access

    ARTICLE

    Rayleigh-Marangoni Instability of Binary Fluids with Small Lewis Number and Nano-Fluids in the Presence of the Soret Effect

    A. Podolny1,2, A. Nepomnyashchy3, A. Oron4

    FDMP-Fluid Dynamics & Materials Processing, Vol.6, No.1, pp. 13-40, 2010, DOI:10.3970/fdmp.2010.006.013

    Abstract A general model for two-component transport phenomena applicable for both nanofluids and binary solutions is formulated. We investigate a combined long-wave Marangoni and Rayleigh instability of a quiescent state of a binary (nano-) liquid layer with a non-deformable free surface. The layer is heated from below or from above. The concentration gradient is induced due to the Soret effect. A typical behavior of monotonic and oscillatory instability boundaries is examined in the limit of asymptotically small Lewis numbers and poorly conducting boundaries in the two important long-wave domains k~Bi1/2and k~Bi1/4. More >

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