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A CFD modeling of oil-water flow in pipeline: Interaction analysis and identification of boundary separation

Petroleum Research 2021年第2期6卷 172-177页

作者： Madjid Meriem-Benziane Benyebka Bou-Saïd Bekhit Abdelkader lrm Mechanical Engineering DepartmentsUniversity of ChlefP.B.151Chlef02000Algeria Universite de Lyon CNRS INSA LyonLaMCoSUMR 5255F-69621France

The aim of this study is to simulate the flow of emulsion (immiscible liquids) which is a complex phenomenon in the petroleum industry. In this study, three types of emulsions (O/W) were simulated usingby CFD which has been applied to predict the interaction behavior of oil with water for differentemulsions (25%Oe75%W, 50%Oe50%W and 75%Oe25%W). Numerical modeling illustrated that the obtained results of the velocity profiles were very good agreement with the experimental data for threetype of emulsions. In addition, the analytical model of interaction analysis and identification of boundaryseparation for two-phase flow approve with the experimental data available, despite the emulsionsremain to be more difficulty due to the complex chemical reactions. The results of this study can providethe best solutions for corrosion during hydrocarbons transportation. Thus, CFD approach is recommended to use for numerical investigates due to the high accuracy.

关键词： Wall shear stress Velocity profile Emulsion Interaction oil-water Non-Newtonian Pipeline

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Comparative study of abrasion via microindentation and microscratch tests of reinforced and unreinforced lamellar cast iron

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Friction 2019年第5期7卷 457-465页

作者： Mohammed MENDAS Stéphane BENAYOUN Laboratory of Rheology and Mechanics(lrm) Hassiba Benbouali University of ChlefHay Essalem Chlef BP151(02000)Algeria LTDS UMR CNRS5513Ecole Centrale de LyonUniversity of LyonEcully Cedex F-69134France

This study compares micro-abrasive wear in two kinds of grey cast iron. Classical lamellar cast iron with fully pearlitic matrix(FGL1) and lamellar micro-alloyed cast iron with phosphorus and boron(FGL2) are used. FGL2 has a fully pearlitic matrix reinforced by the hard phosphorus eutectic phase. The microstructures of these two types of iron are mechanically characterized using nanoindentation tests. Vickers microindentation and microscratch tests are also performed on these iron samples. The indent and scratch images obtained via scanning electron microscopy were used to compare the scratch damage to the two kinds of iron. The friction coefficient is discussed in terms of applied load, indenter attack angle, and scratch damage. Nanoindentation tests show an improvement in graphite’s mechanical properties and an increase in the matrix hardness of the FGL2, relatively to FGL1. The same damage forms for both microindentation and microscratch testing were observed for the two iron samples. However, cracking of the hard phase is observed in FGL2. The results show that the scratching of the micro-alloyed iron(FGL2) leads to less matrix damage and to an extended microploughing wear mechanism. However, at low normal load, the reinforcement of the matrix can increase the friction coefficient.

关键词： grey cast iron indentation microscratch abrasive wear

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Characterization of InGaN Solar Cells

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Journal of Materials Science and Chemical Engineering 2015年第11期3卷 88-91页

作者： Nor Bochra Bousaid Abdelhak lrm Laboratory University of Abou Bekr Belka&iuml d Tlemcen Algeria

The III-V materials are extensively studied for optoelectronic applications in the blue and UV spectral regions. InGaN ternary alloy is considered for its wide spectral coverage, good electrical characteristics and appreciable resistance to high electrical currents. For this purpose, the operation of InGaN photovoltaic cells was studied by 2D numerical simulation under AM1.5 spectrum illumination, using the software Silvaco and the two environments Athena/Atlas.

关键词： Silvaco Indium Gallium Nitride Solar Cells Numerical Simulation Atlas/Silvaco

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Implementation,identification and validation of an elasto-plastic-damage model for the finite element simulation of structural bonded joints

Implementation,identification and validation of an elasto-pl...

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北京粘接学会第二十三届学术年会暨粘接剂、密封剂技术发展研讨会

作者： P.Jousset M.Rachik Sika Technology AG Tffenwies 168048 Zrich Switzerland Université de Technologie de Compiegne Lab. LRM60205 CompiegneFrance

This paper focuses on the quasi-static three-dimensional Finite Element(FE) analysis of structural bonded joints using an advanced material constitutive *** model predicts multi-axial pressure-dependent plasticity as well as damage and failure in confined adhesive *** formulation of plasticity,which considers the influence of hydrostatic pressure,is recalled and the implementation of damage and fracture,using Cohesive Zone(CZ) modelling is *** identification of material constitutive parameters is addressed using butt-bonded hollow cylinders loaded under different load paths,Double Cantilever Beams(DCB) and End Notched Flexure specimens(ENF).The set of material parameters identified is crossed-checked using modified Arcan specimens and finally validated by the FE analysis of an industrial *** methodology developed combines results accuracy and computational efficiency and is well adapted to the numerical simulations of large adhesively bonded industrial structures.

关键词： Tougnenea aanesives/epoxiaes finite Eiement stress Analysis Fracture mecnanics Elasto-plasticity Adhesive testing

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