Browsing by Author "Moderres, Mourad"

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    Influence of the flow characteristics and mud physical properties on the Perfor-mance of a drilling turbine
    (2021) Sahnoune, Khaled; Benbrik, Abderrahmane; Mansour, Ahmed S.; Moderres, Mourad
    For turbo drilling machine operations, several types of drilling mud can be used. The major factors influencing the choice of drilling fluid are: Cost, ecological impact, and the technical performance of the machine. Water-based drilling mud is widely used in drilling turbines. It consists of freshwater with additives such as sand. These added materials will influence the properties of the mud, increasing the density, and changing the rheological properties. In this present work, the influence of the physical properties of the drilling mud (density, viscosity), and flow conditions (mass flow rate) on the performance and flow characteristics of a specified turbodrill Model is investigated. For this purpose, the computational fluid dynamics approach was used to simulate the flow inside one stage of the considered turbine. Various values of mass flow rate, density, and viscosity were tested. A very good agreement was found between the experimental measurements of the manufacturer and the current simulation results for the performance curves
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    Numerical investigation of double-diffusive mixed convection in horizontal annulus partially filled with a porous medium
    (Emerald, 2017) Moderres, Mourad; Abboudi, Said; Ihdene, Malika; Aberkane, Sofiane; Ghezal, Abderahmane
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    Volumetric gas radiation effects on double-diffusive mixed convection
    (Publisher Logo Conference Proceedings, 2020) Benbrik, Abderrahmane; Cherifi, Mohammed; Sahnoune, Khaled; Laouar-Meftah, Siham; Moderres, Mourad
    This work is devoted to studying the effect of volumetric gas radiation on mixed double-diffusive convection in a lid-driven square cavity. The vertical walls are maintained at different uniform temperatures and concentration gradients in cooperating flow. The horizontal walls are thermally insulated and impermeable to mass transfer. All the walls are assumed to be opaque, diffuse and gray. The top wall moves to the right side at a constant velocity. The cavity is filled with gray gas mixture considered as an absorbing, emitting and not scattering medium. The governing flow equations are solved by a finite volume method. The radiative transfer equation is modeled by discrete ordinates method. Results were presented in the form of isotherms, iso-concentrations, velocity profiles and heat and mass transfer for various values of Richardson number (Ri), Buoyancy ration (N) and optical thickness