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  • Open Access


    Towards a Numerical Benchmark for 3D Low Mach Number Mixed Flows in a Rectangular Channel Heated from Below

    G. Accary1, S. Meradji2, D. Morvan2, D. Fougère2

    FDMP-Fluid Dynamics & Materials Processing, Vol.4, No.4, pp. 263-270, 2008, DOI:10.3970/fdmp.2008.004.263

    Abstract In the literature, only few references have dealt with mixed-convection flows in the low Mach number approximation. For this reason, in the present study we propose to extend the standard 3D benchmark for mixed convection in a rectangular channel heated from below (Medale and Nicolas, 2005) to the case of large temperature variations (for which the Boussinesq approximation is no longer valid). The Navier-Stokes equations, obtained under the assumption of a low Mach number flow, are solved using a finite volume method. The results, corresponding to the steady-state case of the benchmark, lead to the More >

  • Open Access


    Mixed Convection in Horizontal Internally Finned Semicircular Ducts

    A. M. Ben-Arous1, A. A. Busedra1

    FDMP-Fluid Dynamics & Materials Processing, Vol.4, No.4, pp. 255-262, 2008, DOI:10.3970/fdmp.2008.004.255

    Abstract The problem of combined free and forced convection in horizontal semicircular ducts (flat wall at the bottom) with radial internal fins is investigated from a numerical point of view. The wall of the duct is assumed to have a uniform heat input along the axial direction with a uniform peripheral wall temperature (H1). The analysis focuses on the case of hydrodynamically and thermally fully-developed laminar flow. The governing equations for the velocity and temperature are solved by using a control-volume-based finite-difference approach. The fluid flow and heat transfer characteristics are found to be dependent on More >

  • Open Access


    Mixed Convection Investigation in an Opened Partitioned Heated Cavity

    O. Mahrouche1, M. Najam1, M. El Alami1,2, M. Faraji1

    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.3, pp. 235-250, 2013, DOI:10.3970/fdmp.2013.009.235

    Abstract Mixed convection in a rectangular partitioned cavity equipped with two heated partitions at a constant temperature, TC, is investigated numerically. The right vertical wall is featured by two openings (C1 and C2) for admission of cooled air along the horizontal direction, while the lower wall has a single outlet opening (C3) along the vertical axis. The left vertical wall is assumed to be isothermal at temperature TC, while the other walls are cooled to a temperature TF < TC. The results show that the flow and heat transfer depend significantly on Reynolds number, Re, and block height, B. Correlation More >

  • Open Access


    Effect of Reynolds Number on Inclined Heated Semicircular Ducts at Different Rotations

    E. A. El-Abeedy1, A. A. Busedra1

    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.2, pp. 153-167, 2013, DOI:10.3970/fdmp.2013.009.153

    Abstract Fully developed laminar mixed convection in inclined semicircular ducts is investigated numerically for the specific case of uniform heat input along the axial direction and uniform peripheral wall temperature, H1. The duct is considered over a variety of orientations (rotations) of its cross section, ranging from 0° (flat wall horizontally facing upward) to 180° (flat wall horizontally facing downward) with increment of 45° and a fixed inclination of its axis (with respect to the direction of gravity). In particular, the following conditions are considered: inclination α = 20°, 300 ≤ Re ≤ 1000, Pr = 4 More >

  • Open Access


    Heat Transfer and Entropy Analysis for Mixed Convection in a Discretely Heated Porous Square Cavity

    A. Maougal1, R. Bessaïh2

    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.1, pp. 35-59, 2013, DOI:10.3970/fdmp.2013.009.035

    Abstract The present study is a numerical investigation of the irreversibility and heat transfer properties of a steady laminar mixed flow in a square cavity, filled with a saturated porous medium and heated by a discrete set of heat sources. The continuity, Navier-Stokes, energy and entropy generation equations have been solved by a finite volume method. Both heat transfer irreversibility and fluid friction irreversibility have been taken into account in the computations of entropy generation. Simulations have bee carried out for Reynolds number Re=20, 40, 80, 100, 200, Darcy number, Da=10-5-10-1, Prandtl number, Pr=0.015, 0.7, 10, 103, More >

  • Open Access


    Two Dimensional Numerical Simulation of Mixed Convection in a Rectangular Open Enclosure

    Md. Tofiqul Islam1, Sumon Saha2, Md. Arif Hasan Mamun3, Mohammad Ali4

    FDMP-Fluid Dynamics & Materials Processing, Vol.4, No.2, pp. 125-138, 2008, DOI:10.3970/fdmp.2008.004.125

    Abstract A numerical study has been performed on mixed convection inside an open cavity on the bottom of a channel. One of the three walls of the cavity experiences a uniform heat flux while the other walls and the top of the channel are adiabatic. Three different cases are considered by applying uniform heat flux on (a) the inflow side (assisting forced flow); (b) the outflow side (opposing forced flow); (c) the bottom horizontal surface (transverse flow). The Galerkin weighted residual method of finite element formulation is used to discretize the governing equations. For mixed convection,… More >

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