PUBLICATIONS SCIENTIQUES ET PEDAGOGIQUES

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Data-Driven and Model-Based Methods for Fault Detection and Diagnosis
(Elsevier Science Publishing, 2020-02-17) MANSOURI Majdi; HARKAT Mohamed Faouzi (Co-Auteur)
Data-Driven and Model-Based Methods for Fault Detection and Diagnosis covers techniques that improve the quality of fault detection and enhance monitoring through chemical and environmental processes. The book provides both the theoretical framework and technical solutions. It starts with a review of relevant literature, proceeds with a detailed description of developed methodologies, and then discusses the results of developed methodologies, and ends with major conclusions reached from the analysis of simulation and experimental studies. The book is an indispensable resource for researchers in academia and industry and practitioners working in chemical and environmental engineering to do their work safely.. • Outlines latent variable based hypothesis testing fault detection techniques to enhance monitoring processes represented by linear or nonlinear input-space models (such as PCA) or input-output models (such as PLS) • Explains multiscale latent variable based hypothesis testing fault detection techniques using multiscale representation to help deal with uncertainty in the data and minimize its effect on fault detection • Includes interval PCA (IPCA) and interval PLS (IPLS) fault detection methods to enhance the quality of fault detection • Provides model-based detection techniques for the improvement of monitoring processes using state estimation-based fault detection approaches • Demonstrates the effectiveness of the proposed strategies by conducting simulation and experimental studies on synthetic data
Ge(Sn) growth on Si(001) by magnetron sputtering
(Materials Today Communications, 2020-11-26) BENOUDIA Mohamed Cherif (Co-Auteur)
The semi-conductor Ge1–xSnx exhibits interesting properties for optoelectronic applications. In particular, Ge1–xSnx alloys with x ≥ 0.1 exhibit a direct band-gap, and integrated in complementary-metal-oxide semiconductor (CMOS) technology, should allow the development of Si photonics. CMOS-compatible magne tron sputtering deposition was shown to produce monocrystalline Ge1–xSnx films with good electrical properties at low cost. However, these layers were grown at low temperature (< 430 K) and contained less than 6 % of Sn. In this work, Ge1–xSnx thin films were elaborated at higher temperature (> 600 K) on Si(001) by magnetron sputtering in order to produce low-cost and CMOS-compatible relaxed pseudo-coherent layers with x ≥ 0.1 exhibiting a better crystallinity. Ge1–xSnx crystallization and Ge1–xSnx crystal growth were investigated. Crys tallization of an amorphous Ge1–xSnx layer deposited on Si(001) or Ge(001) grown on Si(001) leads to the growth of polycrystalline films. Furthermore, the competition between Ge/Sn phase separation and Ge1–xSnx growth prevents the formation of large-grain Sn-rich Ge1–xSnx layers without the formation of β-Sn islands on the layer surface, due to significant atomic redistribution kinetics at the crystallization temperature (T = 733 K for x = 0.17). However, the growth at T = 633 K of a highly-relaxed pseudo-coherent Ge0.9Sn0.1 film with low impurity concentrations (< 2 × 1019 at cm–3 ) and an electrical resistivity four orders of magnitude smaller than undoped Ge is demonstrated. Consequently, magnetron sputtering appears as an interesting technique for the integration of optoelectronic and photonic devices based on Ge1–xSnx layers in the CMOS technology.
Etude de la déformation à chaud des alliages modèles nickel niobium : étude expérimentale et modélisation des microstructures et microtextures via différents mécanismes de DRX
(Editions Universitaires Européennes, 2021-09-06) MATOUGUI Nedjoua
Cet ouvrage traite une étude expérimentale et modélisation du comportement mécanique des alliages modèles nickel niobium au cours de leurs déformation à chaud. Ceci menera à améliorer les connaissances actuelles sur la déformation à chaud des superalliages à base de nickel, destinés pour la fabrication des disques de turbines (terrestres, aéronautique ou autres). L'objectif principal est d'établir l'influence de la teneur en niobium en solution solide sur le comportement de déformation à chaud d’alliages binaires de haute pureté à base de nickel. Pour ce faire, différents matériaux modèles Ni-Nb (Ni-0,01, 0,1, 1, 2, 5 et 10%Nb, + Ni pur), ont été élaborés et déformés en torsion à chaud à différentes températures (800, 900 et 1000°C) et vitesses de déformation (0.03, 0.1 et 0.3 s-1). Cette large gamme de conditions expérimentales est en mesure de déterminer les caractéristiques rhéologiques essentielles et l’influence de l’addition de niobium sur le comportement de la recristallisation dynamique, de caractériser les microstructures et microtextures de ces alliages par la technique moderne EBSD, et de proposer un concept de quantification de la taille des grains via le modele DDRX.
Mécanique et Physique de Mise en Forme des Matériaux : cours et exercices en mise en forme des matériaux à différentes échelles
(Editions Universitaires Européennes, 2021-12-02) MATOUGUI Nedjoua
L'objectif de ce cours est de donner des connaissances approfondies, aux élèves ingénieurs et aux professionnels, sur les procédés de mise en forme des matériaux métalliques et les mécanismes se produisant lors de ces procédés couplant des effets mécaniques et thermiques en vue de mieux modéliser et simuler ces procédés de transformation et de prévoir les performances mécaniques des matériaux et pièces lors de leur utilisation. Le cours est divisé en trois parties: - La première partie concerne l'intérêt de la mise en forme par déformation plastique dans la Science et Génie des Matériaux, elle englobe aussi l'ensemble des phénomènes importants impliqués dans la mise en forme : notions de l'apparition de défauts et contraintes internes, , ainsi que les principaux procédés de mise en forme par déformation plastique tels que le laminage, et l'emboutissage. - La deuxième partie consiste en une introduction avancée aux lois de comportement et théories de la plasticité phénoménologique, . - La troisième partie consiste à décrire profondément les évolutions microstructurales concernant les mécanismes de genèse de sous-structures et des textures au cours de la mise en forme.
Energy Aspects of Acoustic Cavitation and Sonochemistry: Fundamentals and Engineering
(Elsevier Science., 2022-09-02) HAMDAOUI Oualid (Editor); KERBOUA Kaouther (Co-Editor)
Energy Aspects of Acoustic Cavitation and Sonochemistry: Fundamentals and Engineering covers topics ranging from fundamental modeling to up-scaled experiments. The book relates acoustic cavitation and its intrinsic energy balance to macroscopic physical and chemical events that are analyzed from an energetic perspective. Outcomes are directly projected into practical applications and technological assessments covering energy consumption, thermal dissipation, and energy efficiency of a diverse set of applications in mixed phase synthesis, environmental remediation and materials chemistry. Special interest is dedicated to the sonochemical production of hydrogen and its energetic dimensions. Due to the sensitive energy balance that governs this process, this is seen as a "green process" for the production of future energy carriers.
Study of the periodic thermal contact between exhaust valve and its seat in an internal combustion engine
(Maintenance and Reliability, 2023) AZZOUZ Salaheddine (Co-Auteur); AYAD Amar (Co-Auteur)
The focus of internal combustion engine development for urban vehicles is shifting towards reducing materials by making them lighter. In order to maintain thermal and flow levels, a model was developed to study the thermal behavior of valve seats during periodic contact, which can also help improve engine performance and fuel efficiency. The model, composed of two cylindrical bars in periodic contact, takes into account the evolution and topography of the contact surface. The model's performance was evaluated through various experimental studies and showed a maximum difference of 5.05% with experimental values, in good agreement with previous literature. The results showed that heat flux increases with increasing contact frequency and thermal diffusivity affects conductive transfer. This model can be used by manufacturers to evaluate cylinder head temperature and by the automotive industry to improve heat transfer in engines.
For a Sustainable Management of Potential Impacts of Global Change on Coastal Aquifers: Case Study of Coastal Aquifers in Annaba City, Algeria
(Polish Journal of Environmental Studies, 2024-07-13) AICHOURI Imen; NETTOUR Djamel (Co-Auteur)
The Annaba region, situated in the northeastern part of Algeria, harbors significant groundwater resources vital for supplying water to the population, agriculture, and industry. However, increasing pressures from heavy water depletion are raising serious concerns. Continuous exploitation of the aquifer has led to deteriorating water quality and adverse effects on its hydrodynamic equilibrium, resulting in saline intrusions that threaten aquifer utilization and wetland functionality. This study aims to investigate the mechanisms of marine intrusion to characterize saline pollution, identifying the key factors and solutions for seawater contamination of aquifers. Projections for 2035, assuming current climatic conditions and exploitation practices, indicate that without intervention, the negative impacts on groundwater and ecosystems could become catastrophic. The saline intrusion is expected to advance inland by 200 to 300 m on the eastern edge, 500 m in the center of the plain, and up to 1500 m further west. Numerical simulation models, considering environmental heterogeneity, have proven highly effective for understanding the hydrodynamic behavior of aquifers. These models also highlight the vulnerability of coastal aquifers to seawater inflows and significant chloride concentration fluxes. To address the urgent problem of increasing water scarcity in Algeria’s coastal plains, several recommendations have been proposed.
Elimination of malachite green by modified Fenton like process. Application of Box Behnken design
(Global NEST Journal, 2024-10-16) BENDEBANE Salima
The aim of this work was to investigate an advanced oxidation process for removing malachite green from aqueous solutions using a modified Fenton-like process. An experimental Box-Behnken design was applied to determine the optimal conditions by examining the effects of catalyst concentration ([Fe2+]), oxidant concentration ([K2S2O8]), and stirring speed. The analysis of variance (ANOVA) indicated that oxidant concentration was the most significant factor, with a p-value of 0.001, while catalyst concentration, the quadratic term of the oxidant, and the interaction between catalyst concentration and stirring speed were also significant. The optimal conditions for maximum dye removal were found to be a catalyst concentration of 3.5 ppm, an oxidant concentration of 3.07 ppm, and a stirring speed of 200 rpm, achieving a theoretical degradation yield of 100% and an experimental yield of 98%. This agreement validates the model and the importance of the optimized parameters. Additionally, degradation kinetics studies in various natural waters revealed that oxidation efficiency followed this order: Distilled water (98%) > Seawater ≈ Industrial water (88.97%) > Source water (85.57%) > Mineral water (80.52%).
Modeling and simulation of sono-processes : fundamental and semiempirical approaches for ultrasound-assisted processes and sonochemistry
(Elsevier Science., 2024-12-11) KERBOUA Kaouther (Editor)
Modeling and Simulation of Sono-processes provides an overview of the mathematical modeling and numerical simulation as applied to sono-process-related phenomena, from the microscopic to the macroscopic scale, collecting information on this topic into one dedicated resource for the first time. It covers both fundamental and semi-empirical approaches and includes both physical and chemical effects. Single acoustic cavitation bubble and bubble population-related aspects are modeled mathematically, and numerical simulation procedures and examples are presented. In addition, the procedure involving semi-empirical modeling of sonochemical activity and sonochemical reactors is demonstrated and ultrasound assisted processes (hybrid processes) are demonstrated including several case studies. Modeling and Simulation of Sono-processes is written primarily for advanced graduates or early career researchers in physics, physical chemistry or mathematics who want to use mathematical modeling and numerical simulation of aspects related to acoustic cavitation bubble, bubble population, sonochemistry, sonochemical reactors and ultrasound-assisted processes.
A Novel Micro-Thermophotovoltaic Combustor of Hydrogen–Air to Enable Ultra-Lean Combustion, High Thermal Output and NO Low Emissions
(International Journal of Energy Research, 2025-01) AZZOUZ Salaheddine (Co-Auteur)
This study presents a novel micro-combustor (MC) design called micro-trapped vortex combustor (MTVC) for microthermophotovoltaic (MTPV) devices used in small-scale electricity generation. Traditional MC designs struggle to operate efficiently under ultra-lean regimes due to flame quenching, limiting their performance. The proposed MTVC incorporates the trapped vortex concept, inspired by aeronautical applications, to improve thermal performance and stability under ultra-lean conditions. Numerical simulations, using the Navier–Stokes and energy equations for laminar and reactive flow, are conducted to compare the MTVC with conventional micro-backward-step combustors (MBSCs) under hydrogen (H2)–air mixture combustion. The study focuses on key performance parameters such as temperature distribution, heat recirculation, flame shape, flow topology, radiative power and emissions. The results show that the MTVC can operate at an ultra-lean equivalence ratio of Φ=0.5, while the MBSC experiences flame quenching below Φ=0.7. The MTVC design achieves up to 26.51% higher radiative power and a 36% improvement in energy conversion efficiency compared to traditional combustor designs. Additionally, the MTVC produces 43% less nitrogen oxides (NOx) emissions, demonstrating its potential for both higher efficiency and reduced environmental impact in portable power applications.
Remove of a mixture cationics dyes in aqueous solution by a green emulsion liquid membrane
(Global NEST Journal, 2025-01-16) BENDEBANE Salima (Co-Auteur)
The objective of this work is the treatment and purification of an aqueous solution loaded with a mixture of dyes, malachite green (MG) and rhodamine B (Rh-B) using a green emulsified membrane GELM. The proposed GELM process consists of a surfactant (Span 80), an internal phase (sulfuric acid) and a diluent (soybean oil). A Box-Behnken design was implemented to optimize the operating parameters. Three factors were varied: the mass percentage of Span 80, the concentration of the internal phase and a volume ratio Vext/Vem, while keeping the other parameters constant. The results of the optimization give an extraction yield of the dye mixture of 99.77% under the following optimum conditions: 10% by mass for Span 80, a concentration of 0.5 M for the internal phase and a Vext/Vem volume ratio of 7.

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