je suis enseignant chercheur dans une université algerie, mon domaine de recherche est: la corrosion , les inhibiteurs de corrosion, les techniques de caractérisation.
Engineering Applications of Computational Fluid Mechanics, 2020
This study consists of proposing a new mathematical method to develop a new model for evaluating ... more This study consists of proposing a new mathematical method to develop a new model for evaluating thermal distributions throughout convergent-divergent channels between non-parallel plane walls in Jeffery Hamel flow. Subsequently, dimensionless equations that govern temperature fields and velocity are numerically tackled via the Runge-Kutta-Fehlberg approach based on the shooting method. Additionally, an analytical study is performed by applying an effective computation technique named Adomian Decomposition Method. Determining the effect of Reynolds and Prandtl numbers on the heat transfer and fluid velocity inside converging/diverging channels can be mentioned as the fundamental purpose of this research. Based on the results obtained for dimensionless velocity and thermal distributions, a supreme match can be observed between numerical and analytical results indicating the adopted ADM method is valid, applicable, and has great precision.
In multi-messenger astrophysics, we combine different astrophysical messengers in order to study ... more In multi-messenger astrophysics, we combine different astrophysical messengers in order to study different aspects of an object or a process in the Universe. The first direct discovery of gravitational waves (GW) emitted from the inward spiral of two black holes in 2015 took multi-messenger astrophysics to the next level, adding direct detection of GWs to the list of messengers coming from the sky. Almost two years later, the first detection of GWs from a binary neutron star merger alongside electromagnetic (EM) counterparts in several bands started a new era in multi-messenger astrophysics triggering worldwide search programs for GW counterparts. Nowadays, four astronomical messengers exist: EM waves, cosmic rays, neutrinos and GWs. Very High Energy (VHE) gamma-rays cover the highest band in the electromagnetic spectrum and provides valuable information for the characterization of astrophysical phenomena. This is why the search for VHE gamma-ray from GW events is in the heart of these search campaigns. In this contribution, I report on the GW follow-up program with the H.E.S.S. Imaging Atmospheric Cherenkov Telescopes, focusing on the coverage algorithms, that I helped develop and implement in the H.E.S.S. GW follow-up strategy and on its outcome until now.
This work aims to study the inhibition ability of 2 Amino,4–6-imethylpyrimidine (ADMP) compound o... more This work aims to study the inhibition ability of 2 Amino,4–6-imethylpyrimidine (ADMP) compound on the corrosion behavior of mild steel in 0.5 M sulfuric acid solution using electrochemical measurements and surface characterization. In addition, quantum chemical calculations were performed to investigate the inhibition mechanism. Monte Carlo simulations were utilized to determine the adsorption energy and configuration arrangement ADMP to the metal surface. The obtained results indicate that ADMP exhibits good inhibition performance for mild steel corrosion in acidic medium and acts as mixed-type inhibitor. The inhibition efficiency increases with the inhibitor concentration to reach 87%. Quantum chemical calculation and molecular dynamics (MD) simulation methods reveal that the inhibitor acts through the formation of a protective layer at the metal surface by the adsorption of its molecules onto mild steel surface. The adsorption is a mixed type of physical and chemical interaction...
Engineering Applications of Computational Fluid Mechanics
This study consists of proposing a new mathematical method to develop a new model for evaluating ... more This study consists of proposing a new mathematical method to develop a new model for evaluating thermal distributions throughout convergent-divergent channels between non-parallel plane walls in Jeffery Hamel flow. Subsequently, dimensionless equations that govern temperature fields and velocity are numerically tackled via the Runge-Kutta-Fehlberg approach based on the shooting method. Additionally, an analytical study is performed by applying an effective computation technique named Adomian Decomposition Method. Determining the effect of Reynolds and Prandtl numbers on the heat transfer and fluid velocity inside converging/diverging channels can be mentioned as the fundamental purpose of this research. Based on the results obtained for dimensionless velocity and thermal distributions, a supreme match can be observed between numerical and analytical results indicating the adopted ADM method is valid, applicable, and has great precision.
The impact of the black clay soil moisture of Skikda (East of Algeria), on the corrosion cathodic... more The impact of the black clay soil moisture of Skikda (East of Algeria), on the corrosion cathodic protection performance of the API X70 pipeline was studied in this paper. To achieve this objective, first, electrochemical analysis has been carried out. Then, in order the show impact of the black clay soil moisture of Skikda on the cathodic protection of the API X70 Pipeline, the corrosion parameters of the API X70 steel pipeline obtained by electrochemical measurements such as Tafel slopes, corrosion current densities, and corrosion potentials were used as boundary conditions in the elaborated cathodic protection model. The obtained results show that the corrosion current Icorr is directly proportional to the moisture content up to 50 wt. %, with a potential shift towards the more electronegative values. The cathodic protection perfermance has been well proven in black soil at 100 wt. % moisture contents.
The objective of this review is to display and discuss research cited in the literature on the us... more The objective of this review is to display and discuss research cited in the literature on the use of environmentally friendly compounds as metal corrosion inhibitors in an assortment of aggressive environments. Amino acids as corrosion inhibitors are environmentally acceptable and are very economical and easily available. Research focuses on the influence of compound structure, concentration, method of application, and the media in which an inhibitor is used on the effectiveness of the inhibition. Gravimetric, electrochemical and surface characterization techniques have been among the foremost broadly used procedures to evaluate the inhibition efficiency of the compounds studied.
Corrosion is one of the most serious causes that reduce service life of Reinforced Concrete Struc... more Corrosion is one of the most serious causes that reduce service life of Reinforced Concrete Structures (RCS). This is why it is necessary to create concrete mixtures that add durability for steel and that reduce impact on the environment. The use of agro-industrial waste materials rich in SiO 2 , Al 2 O 3 and Fe 2 O 3 , added to concrete, has been the subject of research in recent years, because these pozzolanic materials improves o mecharacteristics of concrete, as mechanical strength, sulfate resistance and lower permeability. Binary Concretes were made and evaluated in the impact of Sugar Cane Bagasse Ash (SCBA) as a partial substitute for Portland cement, with the aim of reducing gtherate of corrosion induced by chloride ions and sulfate. The behavior of corrosion was monitored for 14 months in two aqueous solutions of NaCl and Na 2 SO 4 both at 3.5%, using electrochemical techniques of corrosion potential (E corr) and linear polarization resistance (R p). Under the conditions of study, the binary mixture that showed a better corrosion protection was the one that contained 80% from sugar Cane bagasse ash and 20% Portland cement.
Engineering Applications of Computational Fluid Mechanics, 2020
This study consists of proposing a new mathematical method to develop a new model for evaluating ... more This study consists of proposing a new mathematical method to develop a new model for evaluating thermal distributions throughout convergent-divergent channels between non-parallel plane walls in Jeffery Hamel flow. Subsequently, dimensionless equations that govern temperature fields and velocity are numerically tackled via the Runge-Kutta-Fehlberg approach based on the shooting method. Additionally, an analytical study is performed by applying an effective computation technique named Adomian Decomposition Method. Determining the effect of Reynolds and Prandtl numbers on the heat transfer and fluid velocity inside converging/diverging channels can be mentioned as the fundamental purpose of this research. Based on the results obtained for dimensionless velocity and thermal distributions, a supreme match can be observed between numerical and analytical results indicating the adopted ADM method is valid, applicable, and has great precision.
In multi-messenger astrophysics, we combine different astrophysical messengers in order to study ... more In multi-messenger astrophysics, we combine different astrophysical messengers in order to study different aspects of an object or a process in the Universe. The first direct discovery of gravitational waves (GW) emitted from the inward spiral of two black holes in 2015 took multi-messenger astrophysics to the next level, adding direct detection of GWs to the list of messengers coming from the sky. Almost two years later, the first detection of GWs from a binary neutron star merger alongside electromagnetic (EM) counterparts in several bands started a new era in multi-messenger astrophysics triggering worldwide search programs for GW counterparts. Nowadays, four astronomical messengers exist: EM waves, cosmic rays, neutrinos and GWs. Very High Energy (VHE) gamma-rays cover the highest band in the electromagnetic spectrum and provides valuable information for the characterization of astrophysical phenomena. This is why the search for VHE gamma-ray from GW events is in the heart of these search campaigns. In this contribution, I report on the GW follow-up program with the H.E.S.S. Imaging Atmospheric Cherenkov Telescopes, focusing on the coverage algorithms, that I helped develop and implement in the H.E.S.S. GW follow-up strategy and on its outcome until now.
This work aims to study the inhibition ability of 2 Amino,4–6-imethylpyrimidine (ADMP) compound o... more This work aims to study the inhibition ability of 2 Amino,4–6-imethylpyrimidine (ADMP) compound on the corrosion behavior of mild steel in 0.5 M sulfuric acid solution using electrochemical measurements and surface characterization. In addition, quantum chemical calculations were performed to investigate the inhibition mechanism. Monte Carlo simulations were utilized to determine the adsorption energy and configuration arrangement ADMP to the metal surface. The obtained results indicate that ADMP exhibits good inhibition performance for mild steel corrosion in acidic medium and acts as mixed-type inhibitor. The inhibition efficiency increases with the inhibitor concentration to reach 87%. Quantum chemical calculation and molecular dynamics (MD) simulation methods reveal that the inhibitor acts through the formation of a protective layer at the metal surface by the adsorption of its molecules onto mild steel surface. The adsorption is a mixed type of physical and chemical interaction...
Engineering Applications of Computational Fluid Mechanics
This study consists of proposing a new mathematical method to develop a new model for evaluating ... more This study consists of proposing a new mathematical method to develop a new model for evaluating thermal distributions throughout convergent-divergent channels between non-parallel plane walls in Jeffery Hamel flow. Subsequently, dimensionless equations that govern temperature fields and velocity are numerically tackled via the Runge-Kutta-Fehlberg approach based on the shooting method. Additionally, an analytical study is performed by applying an effective computation technique named Adomian Decomposition Method. Determining the effect of Reynolds and Prandtl numbers on the heat transfer and fluid velocity inside converging/diverging channels can be mentioned as the fundamental purpose of this research. Based on the results obtained for dimensionless velocity and thermal distributions, a supreme match can be observed between numerical and analytical results indicating the adopted ADM method is valid, applicable, and has great precision.
The impact of the black clay soil moisture of Skikda (East of Algeria), on the corrosion cathodic... more The impact of the black clay soil moisture of Skikda (East of Algeria), on the corrosion cathodic protection performance of the API X70 pipeline was studied in this paper. To achieve this objective, first, electrochemical analysis has been carried out. Then, in order the show impact of the black clay soil moisture of Skikda on the cathodic protection of the API X70 Pipeline, the corrosion parameters of the API X70 steel pipeline obtained by electrochemical measurements such as Tafel slopes, corrosion current densities, and corrosion potentials were used as boundary conditions in the elaborated cathodic protection model. The obtained results show that the corrosion current Icorr is directly proportional to the moisture content up to 50 wt. %, with a potential shift towards the more electronegative values. The cathodic protection perfermance has been well proven in black soil at 100 wt. % moisture contents.
The objective of this review is to display and discuss research cited in the literature on the us... more The objective of this review is to display and discuss research cited in the literature on the use of environmentally friendly compounds as metal corrosion inhibitors in an assortment of aggressive environments. Amino acids as corrosion inhibitors are environmentally acceptable and are very economical and easily available. Research focuses on the influence of compound structure, concentration, method of application, and the media in which an inhibitor is used on the effectiveness of the inhibition. Gravimetric, electrochemical and surface characterization techniques have been among the foremost broadly used procedures to evaluate the inhibition efficiency of the compounds studied.
Corrosion is one of the most serious causes that reduce service life of Reinforced Concrete Struc... more Corrosion is one of the most serious causes that reduce service life of Reinforced Concrete Structures (RCS). This is why it is necessary to create concrete mixtures that add durability for steel and that reduce impact on the environment. The use of agro-industrial waste materials rich in SiO 2 , Al 2 O 3 and Fe 2 O 3 , added to concrete, has been the subject of research in recent years, because these pozzolanic materials improves o mecharacteristics of concrete, as mechanical strength, sulfate resistance and lower permeability. Binary Concretes were made and evaluated in the impact of Sugar Cane Bagasse Ash (SCBA) as a partial substitute for Portland cement, with the aim of reducing gtherate of corrosion induced by chloride ions and sulfate. The behavior of corrosion was monitored for 14 months in two aqueous solutions of NaCl and Na 2 SO 4 both at 3.5%, using electrochemical techniques of corrosion potential (E corr) and linear polarization resistance (R p). Under the conditions of study, the binary mixture that showed a better corrosion protection was the one that contained 80% from sugar Cane bagasse ash and 20% Portland cement.
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