Home / Journals / FDMP / Vol.15, No.2, 2019
Table of Content
  • Open Access

    ARTICLE

    Effect of Richardson Number on Unsteady Mixed Convection in a Square Cavity Partially Heated From Below

    Sacia Kachi1,*, Fatima-zohra Bensouici1, Nawel Ferroudj1, Saadoun Boudebous2
    FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.2, pp. 89-105, 2019, DOI:10.32604/fdmp.2019.00263
    Abstract The objective of the present study is to analyze the laminar mixed convection in a square cavity with moving cooled vertical sidewalls. A constant flux heat source with relative length l is placed in the center of the lower wall while all the other horizontal sides of the cavity are considered adiabatic. The numerical method is based on a finite difference technique where the spatial partial derivatives appearing in the governing equations are discretized using a high order scheme, and time advance is dealt with by a fourth order Runge Kutta method. The Richardson number (Ri), which represents the relative… More >

  • Open Access

    ARTICLE

    Mixed Convection of Bingham Fluid in a Two Sided Lid-Driven Cavity Heated From Below

    Toufik Benmalek1, Ferhat Souidi1, Mourad Moderres2,*, Bilal Yassad1, Said Abboudi3
    FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.2, pp. 107-123, 2019, DOI:10.32604/fdmp.2019.04496
    Abstract This study aims to analyze mixed convection in a square cavity with two moving vertical walls by finite volume method. The cavity filled with Non-Newtonian fluid of Bingham model is heated from below and cooled by the other walls. This study has been conducted for certain parameters of Reynolds number (Re=1-100), Richardson number (Ri=1-20), Prandtl number (Pr=1-500), and Bingham number has been studied from 0 to 10. The results indicate that the increase in yield stress drops the heat transfer and the flow become flatter, while increasing Reynolds number augments it. The convective transport is dominant when increasing Richardson number… More >

  • Open Access

    ARTICLE

    The Effect of the Fin Length on the Solidification Process in a Rectangular Enclosure with Internal Fins

    Laila Khatra1,*, Hamid El Qarnia1, Mohammed El Ganaoui2
    FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.2, pp. 125-137, 2019, DOI:10.32604/fdmp.2019.04713
    Abstract The aim of the proposed work is to study the solidification process within a rectangular enclosure provided with three internal rectangular fins attached to the left vertical wall of the cavity. This latest is filled with a phase change material (PCM), initially liquid, at a temperature above its melting temperature. The solidification process was initiated by cooling the left wall and fins to a temperature lower than the melting temperature. In order to study and examine the thermal behavior and thermal performance of the proposed system, a mathematical model, based on the conservation equations of mass, momentum and energy was… More >

  • Open Access

    ARTICLE

    Optimization of a Centrifugal Pump Used as a Turbine Impeller By Means of an Orthogonal Test Approach

    Peng Tian1, Jun Huang1, Weidong Shi1,2,*, Ling Zhou1
    FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.2, pp. 139-151, 2019, DOI:10.32604/fdmp.2019.05216
    Abstract A prototype centrifugal pump with a specific speed of 110 is used to investigate and optimize the performances of a turbine for power generation. Particular attention is given to the design of the internal impeller. The internal flow field is simulated in the framework of a commercial computational fluid dynamics software (ANSYS). Four geometrical parameters of the impeller are considered, i.e., the inlet diameter, the inlet width, the blade number, and the blade angle. The optimization is carried out on the basis of a three-level approach relying on an orthogonal test method. The results of the numerical simulations show good… More >

  • Open Access

    ARTICLE

    Numerical Simulation of Double Diffusive Mixed Convection in a Horizontal Annulus with Finned Inner Cylinder

    Cherfi Ryad1,*, Sadaoui Djamel1, Sahi Adel1, Mouloud Smail1
    FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.2, pp. 153-169, 2019, DOI:10.32604/fdmp.2019.04294
    Abstract The present work relates to a numerical investigation of double diffusive mixed convection around a horizontal annulus with a finned inner cylinder. The solutal and thermal buoyancy forces are sustained by maintaining the inner and outer cylinders at uniform temperatures and concentrations. Buoyancy effects are also considered, with the Boussinesq approximation. The forced convection effect is induced by the outer cylinder rotating with an angular velocity (ω) in an anti-clockwise direction. The studies are made for various combinations of dimensionless numbers; buoyancy ratio number (N), Lewis number (Le), Richardson number (Ri) and Grashof number (Gr). The isotherms, isoconcentrations and streamlines… More >

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