Home / Journals / FDMP / Vol.9, No.2, 2013
Table of Content
  • Open Access

    ARTICLE

    An Experimental Study on Enhancing Cooling Rates of Low Thermal Conductivity Fluids Using Liquid Metals

    S.-A. B. Al Omari1,2, E. Elnajjar1
    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.2, pp. 91-109, 2013, DOI:10.3970/fdmp.2013.009.091
    Abstract In a previous numerical study (Al Omari, Int. Communication in Heat and Mass Transfer, 2011) the heat transfer enhancement between two immiscible liquids with clear disparity in thermal conductivity such as water and a liquid metal (attained by co- flowing them in a direct contact manner alongside each other in mini channel) was demonstrated. The present work includes preliminary experimental results that support those numerical findings. Two immiscible liquids (hot water and liquid gallium) are allowed experimentally to exchange heat (under noflow conditions) in a stationary metallic cup where they are put in direct contact. The experimental results confirm the… More >

  • Open Access

    ARTICLE

    Heat transfer studies in a vertical channel filled with aporous medium

    Pradeep M Kamath1, C Balaji 2, S P Venkateshan1
    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.2, pp. 111-126, 2013, DOI:10.3970/fdmp.2013.009.111
    Abstract This paper reports the results of an experimental study on the enhancement in the heat transfer from a heated aluminium plate placed in a vertical channeland filled with an aluminium metal foam. Hydrodynamic and heat transfer experiments have been conducted for different foam thicknesses. The results of the hy-drodynamic experiments show no significant variation in the pressure drop with anincrease in the foam thickness. However, an increase in the foam thickness contributes an average heat transfer enhancement of 2 to 4 times over an empty channelfor the same Reynolds number. Correlations for Nusselt number are also developedfor porous and empty… More >

  • Open Access

    ARTICLE

    Hydrodynamics and Heat Transfer in Two and Three-dimensional Minichannels

    D. Cherrared1, E. G. Filali1
    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.2, pp. 127-151, 2013, DOI:10.3970/fdmp.2013.009.127
    Abstract Our study deals with the characterization of the flow and related heat transfer in a smooth, circular minichannel. A duct with a sudden (sharp-edged) contraction is also considered. Prediction of the pressure loss coefficient in this case is obtained via the commercial code CFX 5.7.1. This code is based on the finite volume method for the solution of the Navier-Stokes and offers several turbulences models (in this study we use the shear stress turbulence model - SST). The numerical results are compared with experimental results obtained for a configuration similar to those considered in the numerical study. The numerical algorithm… More >

  • Open Access

    ARTICLE

    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 and Gr = 1… More >

  • Open Access

    ARTICLE

    Evaluation of some of the existing models for droplet and spray/wall interactions

    Davood Kalantari1
    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.2, pp. 169-182, 2013, DOI:10.3970/fdmp.2013.009.169
    Abstract In this study, a critical summary of existing spray/wall interaction models is given in synergy with a review of available experimental data. In particular, special attention is devoted to the limitations, difficulties and complexities of the most used approaches in the literatures. An attempt is also made to indicate the bottlenecks and criticalities which typically arise when investigators try to extend results obtained for isolated droplets to the more complex dynamics produced by spray impacts. More >

  • Open Access

    ARTICLE

    Soret driven thermosolutal convection in an inclined porous layer: search of optimum conditions of separation and validity of the boundary layer theory

    A. Rtibi1, M. Hasnaoui1, A. Amahmid1
    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.2, pp. 183-207, 2013, DOI:10.3970/fdmp.2013.009.183
    Abstract In this paper we present an analytical and numerical study of Soret convection in an inclined rectangular porous layer saturated with a binary fluid and subject to uniform heat fluxes. In the problem formulation, the Darcy model is considered and the results are presented for wide ranges of RT (50 ≤ RT ≤ 1000), θ(0°≤θ≤180°) and φ(-1 ≤ φ ≤ 1) for Le = 10, where RT, θ, φ, and Le are the thermal Darcy-Rayleigh number, the cavity inclination, the separation parameter, and the Lewis number, respectively. An analytical solution, derived on the basis of the parallel flow approximation, is… More >

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