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Papers by BOUDEBOUS SAADOUN

Research paper thumbnail of New Approach to Compute Accurately the Entropy Generation Due to Natural Convection in a Square Cavity

E3S Web of Conferences, 2021

The idea to carry out an exercise to compare the calculation of entropy generation for unsteady n... more The idea to carry out an exercise to compare the calculation of entropy generation for unsteady natural convection in a square cavity with vertical sides that are maintained at different temperatures was motived by the observation, in the literature, of inaccurate or often erroneous results concerning the values of this significant physical entity. It then appeared necessary to reconsider this problem in order to ensure its consistent assessment. The new approach that we propose allows a direct access to the value of the entropy generation by considering the exact values of the thermophysical properties of the working fluid, which depends on the Prandtl and the Rayleigh numbers.

Research paper thumbnail of Numerical Simulation of Natural Convection in a Square Cavity with Partially Active Vertical and Horizontal Walls

A numerical study is performed to analyze the steady natural convection phenomena of air in a squ... more A numerical study is performed to analyze the steady natural convection phenomena of air in a square cavity with different locations of the heating portion. The heat sources parts in the left, right and bottom walls of the cavity are maintained at a higher temperature Th, whereas the other parts of these sidewalls are kept at a lower temperature Tc. The enclosure’s top wall is kept insulated. The coupled equations of continuity, momentum and energy are solved by a finite volume method. The SIMPLE algorithm is used to solve iteratively the pressurevelocities coupling. The numerical investigations in this analysis is made over a wide range of parameters, Rayleigh number ( ) and dimensionless heater lengths. The effect of three different heating locations on the vertical walls (bottom, Centre, and top) and the local heat source on the bottom wall was evaluated. Results are presented graphically in the form of streamlines, isotherms and also with a velocity profiles and average Nusselt ...

Research paper thumbnail of Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom

1 Département de Génie Mécanique, Université Mentouri Constantine, Route de Ain El Bey, 25000, Co... more 1 Département de Génie Mécanique, Université Mentouri Constantine, Route de Ain El Bey, 25000, Constantine, Algérie 2 Département Génie Mécanique, Université Oum El Bouaghi, Algérie 3 Département des Sciences et Techniques, Faculté des Sciences et de la Technologie, Centre Universitaire Abdelhafid Boussouf – Mila, Algérie 4 Département de Génie des Transport, Université Mentouri Constantine, Route de Ain El Bey, 25000, Constantine, Algérie 5 Département Génie Mécanique, Ecole National Polytechnique de Constantine ENPC, Constantine, Algérie

Research paper thumbnail of New Approach to Compute Accurately the Entropy Generation Due to Natural Convection in a Square Cavity

E3S Web of Conferences, 2021

The idea to carry out an exercise to compare the calculation of entropy generation for unsteady n... more The idea to carry out an exercise to compare the calculation of entropy generation for unsteady natural convection in a square cavity with vertical sides that are maintained at different temperatures was motived by the observation, in the literature, of inaccurate or often erroneous results concerning the values of this significant physical entity. It then appeared necessary to reconsider this problem in order to ensure its consistent assessment. The new approach that we propose allows a direct access to the value of the entropy generation by considering the exact values of the thermophysical properties of the working fluid, which depends on the Prandtl and the Rayleigh numbers.

Research paper thumbnail of Numerical Simulation of Natural Convection in a Square Cavity with Partially Active Vertical and Horizontal Walls

A numerical study is performed to analyze the steady natural convection phenomena of air in a squ... more A numerical study is performed to analyze the steady natural convection phenomena of air in a square cavity with different locations of the heating portion. The heat sources parts in the left, right and bottom walls of the cavity are maintained at a higher temperature Th, whereas the other parts of these sidewalls are kept at a lower temperature Tc. The enclosure’s top wall is kept insulated. The coupled equations of continuity, momentum and energy are solved by a finite volume method. The SIMPLE algorithm is used to solve iteratively the pressurevelocities coupling. The numerical investigations in this analysis is made over a wide range of parameters, Rayleigh number ( ) and dimensionless heater lengths. The effect of three different heating locations on the vertical walls (bottom, Centre, and top) and the local heat source on the bottom wall was evaluated. Results are presented graphically in the form of streamlines, isotherms and also with a velocity profiles and average Nusselt ...

Research paper thumbnail of Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom

1 Département de Génie Mécanique, Université Mentouri Constantine, Route de Ain El Bey, 25000, Co... more 1 Département de Génie Mécanique, Université Mentouri Constantine, Route de Ain El Bey, 25000, Constantine, Algérie 2 Département Génie Mécanique, Université Oum El Bouaghi, Algérie 3 Département des Sciences et Techniques, Faculté des Sciences et de la Technologie, Centre Universitaire Abdelhafid Boussouf – Mila, Algérie 4 Département de Génie des Transport, Université Mentouri Constantine, Route de Ain El Bey, 25000, Constantine, Algérie 5 Département Génie Mécanique, Ecole National Polytechnique de Constantine ENPC, Constantine, Algérie