Publications Internationales

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    Numerical Simulation of the Flow Around a Cylinder
    (Praise Worthy Prize, 2023) Irinislimane, Kenza; Hamane, Dawoud
    The work carried out consisted of the analysis of the flow around a cylinder using a numerical technique based on the Lattice Boltzmann Method (LBM), a relatively recent numerical calculation technique. Contrary to the traditional approaches of numerical simulation of the dynamics of the fluids (CFD) which consist in solving the equations of Navier-Stokes, the method used assimilates the fluid to fictitious particles. The equations are then solved for those particles which perform successive propagations and collisions in a mesh. This technique has been successfully applied for flows in porous media and for multiphase flows, in intensive computing. These simulations were carried out using a free code, Palabos, based on Linux. For a grip of the code and a validation of the method applied, the calculations were first applied to a cylinder placed in a two-dimensional then three-dimensional domain, for a laminar flow then for a turbulent flow represented by a large-scale simulation model (LES, Large Eddy Simulation).
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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