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Now showing items 1-20 of 118

Étude de l'évolution de l'interface Ni/GaAs lors d'un recuit

Rabhia, S.; Benoudia, C.; Hoummada, K.; Perrin-Pellegrinc, C. (Université Frères Mentouri - Constantine 1, 2016-01-15)

Les travaux de recherche se sont orientés vers les semi-conducteur III-V, nous nous somme intéressé plus précisément aux deux systèmes GaAs et InAs, car ces derniers présentent des propriétés intéressantes commela haute ...
Evaluation of radioactivity levels in sediment samples collected from Beni Haroun dam using high resolution gamma-ray spectrometry

Bouhila, G.; Azbouche; Belamri, M. (Universté Frères Mentouri - Constantine 1, 2016-12-14)

The majority of exposure to radiation comes from natural sources. Therefore, the knowledge of radionuclide distribution and radiation levels in the environment is important. The purpose of the study is twofold: first to ...
Effects of inclination angle onnatural convection in cubic enclosure filledwith Copper–water nanofluid

Azzouz, Khaddoudja; Djezzar, Mahfoud (Université Frères Mentouri - Constantine 1, 2016-12-14)

Effects of inclination angle on natural laminar and transient convection in a cubic enclosure filled with Cu-nanofluid,are analyzed numerically. The angle of inclination is usedas a control parameter for flow and heat ...
Effect Of The Solar Tracking On The Performance Of A Cylindrical Parabolic Concentrator

Boutghan, C.; Chaker, A. (Université Frères Mentouri - Constantine 1, 2016-12-14)

Algeria, which has an exceptional solar potential with over 3000 hours of sunshine and an area of 2.381.745 Km2 decided to implement a strategy to develop various applications of solar energy and in particular the solar ...
L’effet des paramètres externes sur un capteur solaire plan incliné

Bouras, A.; Bellel, N. (Université Frères Mentouri - Constantine 1, 2016-12-14)

L’objectif de ce travail est motivé par la recherche de procédés, évidemment intermittents, qui sauront exploiter gratuitement l’abondance de l’énergie solaire. Notre étude consiste à maître en relief l’effet des paramètres ...
Influence des facteurs du milieu saharien sur le climat sous serre

Bezari, S.; Aissa, M.; Lalmi, D. (Université Frères Mentouri - Constantine 1, 2016-12-14)

Le matériau de paroi est l’élément essentiel de la serre, sa fonction principale est d’assurer un effet de serre aussi favorable que possible tout en laissant pénétrer la lumière. Le plastique et le verre sont les matériaux ...
Porous Surface Processes of Cu/SnO2 films in the detection of CH3OH-liquid, Prepared by Dip-Coating Method

Benzitouni, S.; Zaabat, M.; Ebothe, J.; Khial, A.; Rechem, D.; Cheriet, H.; Bouras, D. (Université Frères Mentouri - Constantine 1, 2016-12-14)

In recent years, the detection methods of toxic chemical species and measurement of their concentration increased significantly. In the field of detection of chemical species, we must distinguish chemical sensors that play ...
Study the Boron Spectrums Induced by Laser Sublimation

Benmebrouk, L.; Hamdat, B.; Khelfaoui, F. (Université Frères Mentouri - Constantine 1, 2016-12-14)

This paper is based on the study of the emitted radiation by using LIBS technique (Laser Induced Breakdown Spectroscopy). It is an advanced technique allows analyzing solid, liquid and gaseous materials and it leads to ...
Study of fiber bragg gratings apodized with different apodiztion

Bouzida, A.; Triki, H.; El Akrmi, A. (Université Frères Mentouri - Constantine 1, 2016-12-14)

A fiber Bragg grating (FBG) is a period perturbation of the effective refractive index in the core of an optical fiber. There are many types of Bragg gratings, most notably the normal or uniform Bragg gratings, tilted Bragg ...
Structural, morphological and optical properties of Zn-doped CdS thin films prepared by chemical bath deposition

Cheriet, H. (Université Frères Mentouri - Constantine 1, 2016-12-14)

Zinc-doped Cadmium Sulfide (ZCS)-thin films were grown on the glass substrates by using the chemical bath deposition technique. The correlation between X-ray diffractometer (XRD), atomic force microscopy (AFM) operated in ...
Etudes des propriétés structurales, électroniques et magnétiques des systèmes Gen et CuGen (n=2-20) : étude à travers la DFT

Siouania, C.; Mahtouta, S.; Rabilloud, F. (Université Frères Mentouri - Constantine 1, 2016-12-14)

Dans ce présent travail, nous étudions les propriétés électroniques et magnétiques des nanostructures de germanium pures et de germanium dopées par le cuivre (CuGen) dans le rang de 2 à 20 atomes. Ce travail est purement ...
Structure cristalline du Bis (4-chloroacetylphenyl) selenideC16H12Cl2O2Sedéterminée par la diffrraction des rayons X et comparée à la conformation moléculaire calculée à partir de la chimie quantique (DFT)

Bouraoui, H.; Medjani, M.; Mechehoud, Y.; Meinnel, J. (Université Frères Mentouri - Constantine 1, 2016-12-14)

Ce travail concerne une étude comparative de la géométrie moléculaire de composés halogéno- méthyles aromatiques établie à partir de l’expérience (diffraction des rayons X) dans notre cas il sera question du Bis(4-chloro ...
Optimisation des paramètres de fonctionnement d’un plancher solaire direct

Abbaz, D.; Chaker, A. (Université Frères Mentouri - Constantine 1, 2016-12-14)

Dimensionner un plancher chauffant n’est pas aisé, car une multitude de facteurs entrent en ligne de compte selon différents paramètres de base tels que, la température du fluide chauffant (sortie capteur-entrée dalle), ...
Investigation of the Different Shapes Effects of Nanoparticles on the Nanofluids Heat Transfer in Horizontal Annuli

Benkhedda, M.; Boufendi, T.; Touahri, S. (Université Frères Mentouri - Constantine 1, 2016-12-14)

This paper is concerned with the effects of the nanoparticles geometry on the forced convection heat transfer of a nanofluid flow, inside a horizontal annulus uniformly heated at the outer wall while the inner wall is ...
Enhancement of natural convection flow using nanofluid in an annular space between confocal elliptic cylinders

Bouzerzour, Abdeslam; Djezzar, Mahfoud; Tayebi, Tahar (Université Frères Mentouri - Constantine 1, 2016-12-14)

In the current study, natural convection heat transfer in two-dimensional annulus formed by two differentially heated confocal elliptic cylinders oriented and filled with a nanofluid is studied numerically. Equations of ...
Etude numérique de champs thermique des écoulements de convection naturelle à hauts nombre de Rayleigh dans la partie haute d’une cavitédifférentiellement chauffée

Taloub, Djedid; Beghidja, Abdelhadi; Bouras, Abdelkarim (Université Frères Mentouri - Constantine 1, 2016-12-14)

Dans cette communication nous avons effectué une simulation numérique de convection naturelle dans une enceinte fermée de grande taille (de 2.46m de hauteur) et comportant des parois verticales maintenues à des températures ...
Forced Convection Heat Transfer and Fluid Dynamic of a TaylorCouette Flow in a Horizontal Gap of a Heated Pipe

Chaieb, I.; Boufendi, T. (Université Frères Mentouri - Constantine 1, 2016-12-14)

The present work focuses on the numerical simulation of forced convective heat transfer and fluid dynamic of a TaylorCouette flow in a gap of a horizontal annulus. Both the inner and the outer cylinder are isothermal with ...
Comparative study of fluid flow and thermal transfer between usual fluids and nanofluids in a heated horizontal pipe

Benzeggouta, O.; Boufendi, T. (Université Frères Mentouri - Constantine 1, 2016-12-14)

The purpose of this study is the investigation and the comparison of thermal performance of conventional heat transfer fluid and nanofluid flowing in a horizontal tube submitted to uniform heat flux. Three dimensional ...
Numerical study of natural convection in double chapels agricultural greenhouse

Slatni, Yassine; Djezzar, Mahfoud; Benderradji, Razik (Université Frères Mentouri - Constantine 1, 2016-12-14)

In this investigation, we studied the numerical phenomena of the natural laminar and permanent convection in greenhouse with double chapels. The greenhouse is filled by a Newtonian and incompressible fluid. The number of ...
The hydrodynamic stability of laminar boundary layer flow along a horizontal plate with suction

Laouer, Abdelghani; Mezaache, El Hacene (Université Frères Mentouri - Constantine 1, 2016-12-14)

Hydrodynamic stability and transition problems of two dimensional laminar external flow over a flat plate with wall suction are studied numerically using thetemporal linear stability theory. The flow is assumed similar ...

Browsing Faculté des sciences Exactes by Issue Date

Browsing Faculté des sciences Exactes by Issue Date

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