Browsing by Author "Merrouchi, Farida"

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    Hétérogénéités des vitesses et la taille des particules dans les collecteurs d’assainissement
    (Université Larbi Ben M’hidi– OUM EL BOUAGHI, 2022) Makhloufi, Hala; Bouzeghaya, Aymen; Merrouchi, Farida
    L’objectif de ce travail de mémoire est la simulation numérique instationnaire 3D de l’hydrodynamique et du transport particulaire dans les ouvrages hydrauliques d’assainissement de simple géométrie (conduite d’assainissement), L’approche Euler-Lagrange DDPM est retenue pour simuler l’écoulement liquide et le transport particulaire, En introduisant dans le calcul les diamètres et les masses volumique des particules solides transportés par les eaux usées mesurée au laboratoire pour les deux cas de mesure (temps sec et temps pluvieux). La turbulence est étudiée en utilisant une approche Euler-Lagrange basée sur le modèle de turbulence k-ω-sst Ce travail est réalisé à l’aide du logiciel ANSYS-Fluent. D’après les résultats obtenus, l’ajout de particule dans un champ liquide à forte taux de chargement et à des diamètres important influe sur le comportement hydrodynamique en le comparant au cas monophasique.
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    The Influence Of Obstacles And Suspended Matter On The Distribution Of Turbulent Flow Velocities In A Lamella Separator
    (Oum-El-Bouaghi University, 2017) Merrouchi, Farida; Fourar, Ali; Massouh, Fawaz; Haddad, Djamel; Azoui, Hanane
    Stormwater retention ponds are important for the management of urban waste in the rain In sanitation, retention ponds are often constructed to reduce flood risks. Moreover, good decontamination performance was observed by settling. This is why these structures are used increasingly as a holding-settling structures. The problem of lamella settling tank is the inhomogeneous distribution of the flow velocity between the blades then this work focuses on the study of the interaction between the barriers and the turbulence phenomenon. The free surface can isolate the effect of obstacles and avoid possible interactions between obstacles. In this perspective, we first headed identify the physical mechanisms associated with the presence, at the same time an obstacle and two obstacles to test the ability of the program where we found results satisfied after we'll focus our study on a channel which is characterized by complex geometry and the presence of a significant number of obstacles the case of a lamella separator and their effects on the turbulent open channel flow, and secondly interpret the role of these obstacles and influence on the dynamics of turbulent free surface flow. The model based on the Navier-Stokes averaged (RANS) was implemented in the FORTRAN code using the finite volume method (ADI scheme). It is shows the important role of the isotropic nature of turbulence in the complex geometry channel taking into account the case of the free surface similar to a solid wall and the second case the free surface is a permeable medium.