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| 1 | Numerical study of the performance of multistage Scaba 6SRGT impellers for the agitation of yield stress fluids in cylindrical tanks显示文摘The 3-D flow fields and power consumption in a vessel stirred by multistage Scaba 6SRGT impeller have been investigated. The Xanthan gum solutions in water were used, which have a shear thinning behavior with yield stress. This study was carried out with the help of a CFD package(CFX 13.0, Ansys Inc.) which is based on the finite volume method to solve the momentum equations. The effects of stirring rate, fluid rheology, impeller number, impeller location and vessel size on the performance of such stirred system are presented. To validate the CFD model, our predicted results have been compared with other literature data and a satisfactory agreement has been found. | AMEUR Houari BOUZIT Mohamed GHENAIM Abdellah | 2015 | Journal of Hydrodynamics2015，27，3： | 5 |
| 2 | Effect of the shaft eccentricity and rotational direction on the mixing characteristics in cylindrical tank reactors显示文摘Strategy of the shaft eccentricity is introduced to enhance the mixing characteristics in a flat bottomed cylindrical vessel without baffles. The mixing is ensured by a six-curved blade impeller. Three solutions which are models of food emulsions are used as working fluids. These solutions have a shear thinning behavior modeled by the power-law. The effects of fluid properties, stirring rates, impeller rotational direction and impeller eccentricity on the 3D flow fields and power consumption are investigated. Three values of impeller eccentricity are considered, namely 0%, 24% and 48% of the vessel diameter. It is found that the opposite clockwise rotational direction reduces the power consumption, compared with the clockwise rotational direction. Also, the obtained results show that an impeller placed at an eccentric position between 24% and 48% of the vessel diameter and at the third of the vessel height may ensure the best mixing characteristics. | Houari Ameur | 2016 | Chinese Journal of Chemical Engineering2016，24，12： | 4 |
| 3 | 3D hydrodynamics involving multiple eccentric impellers in unbaffled cylindrical tank显示文摘In this paper,the numerical predictions of 3D hydrodynamics and power consumption in a vessel stirred by multiple eccentrically located impellers are presented.The vessel is a flat-bottomed cylindrical one equipped with six-curved bladed impellers.Aqueous solutions of xanthan gum are used,which have a shear thinning behavior with yield stress.The in fluence of several parameters on the mixing ef ficiency has been investigated,namely:the stirring rate,fluid rheology,impeller number and impeller clearance from the tank bottom.Our predicted results are compared with other experimental data and a satisfactory agreement is found. | Houari Ameur | 2016 | Chinese Journal of Chemical Engineering2016，24，5： | 4 |
| 4 | Effect of Agitator’s Types on the Hydrodynamic Flow in an Agitated Tank显示文摘The aim of this paper is to study the effect of agitator’s types on the turbulent flows in stirred tanks without and with baffles.The hydrodynamics behavior induced by four different agitator’s types:a Rushton turbine(RT),a circular blade turbine(CBT),a diverging triangular blade turbine(DTBT)and converging triangular blade turbine(CTBT)are numerically predicted by solving the Navier-Stokes equations and RNGκ–εturbulent model.The simulations are carried out using the Multi Reference Frame(MRF)approach.The numerical results showed good agreement with experiment.We find that the agitator CTBT gives an important profit on the power consumption per report/ratio the others and DTBT give a good reduction of the vortex size of the impeller angles. | Mohammed Foukrach Mohamed Bouzit Houari Ameur Youcef Kamla | 2020 | Chinese Journal of Mechanical Engineering2020，33，2： | 2 |
| 5 | Effect of some parameters on the performance of anchor impellers for stirring shear-thinning fluids in a cylindrical vessel显示文摘The 3-D hydrodynamics of shear thinning fluids in a stirred tank with an anchor impeller were numerically simulated.By using a computational fluid dynamics code(CFX 13.0),the obtained results give a good prediction of the hydrodynamics such as the velocity fields and cavern size.The multiple reference frames(MRF) technique was employed to model the rotation of the impellers.The rheology of the fluid was approximated using the Ostwald model.To validate the CFD model,some predicted results were compared with the experimental data and a satisfactory agreement was found.The effects of impeller speed,fluid rheology,and some design parameters on the flow pattern,cavern size and power consumption were explored. | Houari AMEUR | 2016 | Journal of Hydrodynamics2016，28，4： | 2 |
| 6 | Effect of the Inclination of Baffles on the Power Consumption and Fluid Flows in a Vessel Stirred by a Rushton Turbine显示文摘The role of baffles in mechanically stirred tanks is to promote the stability of power drawn by the impeller and to avoid the fluid swirling, thus enhancing mixing. The present paper numerically investigates the baffles effects in a vessel stirred by a Rushton turbine. The geometric factor of interest is the baffle inclination which is varying between 25°, 32.5°, 45°, 70° and 90° at different impeller rotational speeds. The impeller rotational direction has also been varied. The vortex size and power consumption were evaluated for each geometrical configuration. It was found that the best configuration is the baffle inclination by α = 70° at a negative angular velocity. | Youcef Kamla Mohamed Bouzit Houari Ameur Mohammed Ilies Arab Abdessalam Hadjeb | 2017 | Chinese Journal of Mechanical Engineering2017，30，4： | 2 |
| 7 | A New Method for Sentiment Analysis Using Contextual Auto-Encoders显示文摘Sentiment analysis, a hot research topic, presents new challenges for understanding users' opinions and judg-ments expressed online. They aim to classify the subjective texts by assigning them a polarity label. In this paper, weintroduce a novel machine learning framework using auto-encoders network to predict the sentiment polarity label at theword level and the sentence level. Inspired by the dimensionality reduction and the feature extraction capabilities of theauto-encoders, we propose a new model for distributed word vector representation "PMI-SA" using as input pointwise-mutual-information "PMI" word vectors. The resulted continuous word vectors are combined to represent a sentence. Anunsupervised sentence embedding method, called Contextual Recursive Auto-Encoders "CoRAE", is also developed forlearning sentence representation. Indeed, CoRAE follows the basic idea of the recursive auto-encoders to deeply composethe vectors of words constituting the sentence, but without relying on any syntactic parse tree. The CoRAE model consistsin combining recursively each word with its context words (neighbors' words: previous and next) by considering the wordorder. A support vector machine classifier with fine-tuning technique is also used to show that our deep compositionalrepresentation model CoRAE improves significantly the accuracy of sentiment analysis task. Experimental results demon-strate that CoRAE remarkably outperforms several competitive baseline methods on two databases, namely, Sanders twittercorpus and Facebook comments corpus. The CoRAE model achieves an efficiency of 83.28% with the Facebook dataset and97.57% with the Sanders dataset. | Hanen Ameur Salma Jamoussi Abdelmajid Ben Hamadou | 2018 | Journal of Computer Science & Technology2018，33，6： | 2 |
| 8 | Simulating the Turbulent Hydrothermal Behavior of Oil/MWCNT Nanofluid in a Solar Channel Heat Exchanger Equipped with Vortex Generators显示文摘Re-engineering the channel heat exchangers(CHEs)is the goal of many recent studies,due to their great importance in the scope of energy transport in various industrial and environmental fields.Changing the internal geometry of the CHEs by using extended surfaces,i.e.,VGs(vortex generators),is the most common technique to enhance the efficiency of heat exchangers.This work aims to develop a newdesign of solar collectors to improve the overall energy efficiency.The study presents a new channel design by introducing VGs.The FVM(finite volume method)was adopted as a numerical technique to solve the problem,with the use of Oil/MWCNT(oil/multi-walled carbon nano-tubes)nanofluid to raise the thermal conductivity of the flow field.The study is achieved for a Re number ranging from12×10^(3) to 27×10^(3),while the concentration(φ)of solid particles in the fluid(Oil)is set to 4%.The computational results showed that the hydrothermal characteristics depend strongly on the flow patterns with the presence of VGs within the CHE.Increasing the Oil/MWCNT rates with the presence of VGs generates negative turbulent velocities with high amounts,which promotes the good agitation of nanofluid particles,resulting in enhanced great transfer rates. | Rachid Maouedj Younes Menni Mustafa Inc Yu-Ming Chu Houari Ameur Giulio Lorenzini | 2021 | Computer Modeling in Engineering & Sciences2021，，3： | 2 |
| 9 | Genetic adaptation of fatty-acid metabolism:a human specific haplotype increasing the bio synthesis of long-chain omega 3 and omega-6 fatty acids显示文摘 | Ameur A Enroth S Johansson A | 2012 | Am J Hum Genet2012，90，5： | 1 |
| 10 | Power consumption for stirring shear thinning fluids by two-blade impeller显示文摘 | Houari Ameur Mohamed Bouzit | 2012 | Energy2012，，11： | 1 |
| 11 | Anterior transbrachial ap- proach of the coronoid apophysis 显示文摘 | Ameur NE Rebouh M Oberlin C | 1999 | Chir Main1999，18，3： | 1 |
| 12 | Interactive system safety and usability enforced with the development process显示文摘 | Jambon F Girard P Ameur Y A | 2001 | Engineering for Human-Computer Interaction2001，2254，： | 1 |
| 13 | Retro-iliac ureter associated with ipsilateral megaureter显示文摘 | Ameur A Lezrek M Jira H | 2002 | Prog Urol2002，12，： | 1 |
| 14 | Hydrodynamic study involving a maxblend impeller with yield stress fluids显示文摘 | Ameur H Bouzit M Helmaoui M | 2012 | Journal of Mechanical Science&Technology2012，26，5： | 1 |
| 15 | Determination of chlorinated pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers in human milk from Bizerte (Tunisia) in 2010 显示文摘 | Hassine S B Ameur W B Gandoura N | 2012 | Chemosphere2012，89，4： | 1 |
| 16 | Virtual Network Provisioning Across Multiple Substrate Networks显示文摘 | HOUIDI I LOUATI W AMEUR W | 2011 | Com-puter Networks2011，55，4： | 1 |
| 17 | Butyrate me- diates decrease of histone acetylation centered on transcrip- tion start sites and down-regulation of associated genes 显示文摘 | Rada-Iglesias A Enroth S Ameur A | 2007 | Genome Res2007，17，6： | 1 |
| 18 | Comparison of theeffects of sucrose and hexose on furfural formation and browning incookies baked at different temperatures显示文摘 | AMEUR L A MATHIEU O LALANNE V | 2007 | Food Chemistry2007，101，4： | 1 |
| 19 | Genetic adaptation of fatty-acid metabolism, a hu- man-specific haplotype increasing the biosynthesis of long-chain omega-3 and omega-6 fatty acids显示文摘 | Ameur A | 2012 | Am J Hum Genet2012，90，5： | 1 |
| 20 | Root-derived respiration and nitrous oxide production as affected by crop phenology and nitrogen fertilization 显示文摘 | Benjamin K S Ameur M M Joann K W | 2010 | Plant and Soil2010，326，12： | 1 |
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