Browsing by Author "Baghli, Houda"

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    Entropy generation optimization of a hemispherical anchor agitated batch reactor
    (American Institute of Physics, 2019) Baghli, Houda; Tchouar, Noureddine; Merah, Abdelkrim
    The entropy generation optimization of a hemispherical anchor agitated batch reactor has been studied, to optimize the heat transfer in the process of production of a cosmetic cream cooled by a jacket at industrial scale. The main objective of this optimization of the cooling condition was the improvement of the product quality and the reduction the energy consumption of the process. The phenomenon considered is two-dimensional, axisymmetric and permanent. The entropy generation optimization has been carried out successfully by the simulation of the heat transfer throw the reactor wall and the agitated fluid. The results give the optimum speed velocity for agitation and the optimal cooling time and coolant temperature
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    Numerical simulation of natural convection between two concentric isothermal spheres at moderate Rayleigh number
    (American Institute of Physics, 2019) Baghli, Houda; Cheddadi, Abdelkhalek
    The numerical Simulation of natural convection within an incompressible Newtonian fluid confined between two isothermal and concentric spheres is carried out. The phenomenon considered is two-dimensional, axisymmetric and permanent, with an annular space ratio of A = 2, filled with air Pr = 0.7, at moderate Rayleigh number Ra between 103 and 106. Simultaneous resolution of the continuity equations, of Navier-Stokes and energy, is carried out by the combination of the implicit method of alternate directions (ADI) with the method of convergence acceleration by successive replacement (SAR), in the Vorticity-Stream function formulation. The isovalues of temperature T and the steam function ψ obtained, as well as the Average Nusselt number, are in a good agreement with previous studies, and gives new Nusselt number correlation Nu = f(Ra)