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Wave Reflection by Rectangular Breakwaters for Coastal Protection

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Fluid Dynamics & Materials Processing 2024年第3期20卷 579-593页

作者： Hasna Akarni Hamza Mabchour Laila El Aarabi soumia Mordane Laboratory of Polymer Physics Mechanical Sciences and MaterialsFaculty of Sciences Ben M’SikHassan II University of CasablancaCasablanca20670Morocco

In this study,we focus on the numerical modelling of the interaction between waves and submerged structures in the presence of a uniform flow *** the same and opposite senses of wave propagation are *** main objective is an understanding of the effect of the current and various geometrical parameters on the reflection *** wave used in the study is based on potential theory,and the submerged structures consist of two rectangular breakwaters positioned at a fixed distance from each other and attached to the bottom of a wave *** numerical modeling approach employed in this work relies on the Boundary Element Method(BEM).The results are compared with experimental data to validate the *** findings of the study demonstrate that the double rectangular breakwater configuration exhibits superior wave attenuation abilities if compared to a single rectangular breakwater,particularly at low ***,the study reveals that wave mitigation is more pronounced when the current and wave propagation are coplanar,whereas it is less effective in the case of opposing current.

关键词： Wave current breakwaters Boundary Element Method(BEM) reflection coefficient

Study of Hygrothermal Behavior of Bio-Sourced Material Treated Ecologically for Improving Thermal Performance of Buildings

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Journal of Renewable Materials 2024年第5期12卷 1007-1027页

作者： soumia Mounir Miloudia Slaoui Youssef Maaloufa Fatima Zohra El Wardi Yakubu Aminu Dodo Sara Ibn-Elhaj Abdelhamid Khabbazi National School of Architecture Agadir New Complex Ibn Zohr AgadirHay dakhla80000Morocco EMDD CERNE2DUniversity Mohammed V in RabatEst SaléSaléMedinaMorocco Physics Department LPMAT LaboratoryFaculty of Sciences Ain ChockHassan II UniversityCasablancaMorocco Architectural Engineering Department College of Engineering Najran UniversityNajran66426Saudi Arabia The Centre of Scientific and Engineering Research Najran UniversityNajranSaudi Arabia

Creating sustainable cities is the only way to live in a clean environment,and this problem can be solved by using bio-sourced and recycled *** this purpose,the authors contribute to the valuation of sheep wool waste as an eco-friendly material to be used in *** paper investigates the thermal,hygrothermal,and biological aspects of sheep wool by testing a traditional *** biological method of aerobic mesophilicﬂora has been *** X was used to determine the chemical composition of the materials ***,thermal characterization has been *** thermal conductivity is above 0.046(W·m^(-1)·K^(-1))and the thermal diffusivity is 1.56.10^(-6) m^(2)·s^(-1).Besides,the energy efﬁciency of using sheep wool in buildings was ***,its humidity behavior was evaluated in different aspects in both winter and *** of biological analyses show the efﬁciency of the treatment by removing the majority of the microorgan-isms:the value of yeast and mildew was reduced from 38.10^(2) to 2.10^(2)(UFC·g^(-1)).In addition to that,sheep wool permits obtaining a low thermal transmittance on the scale of the walls and low cooling needs on the scale of the building with a gain of 45%and 52%,respectively.

关键词： Sustainability sheep wool biological treatment hygrothermal wool behavior hot wire method

Thermo-Physical Potential of Recycled Banana Fibers for Improving the Thermal and Mechanical Properties of Biosourced Gypsum-Based Materials

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Journal of Renewable Materials 2024年第4期12卷 843-867页

作者： Youssef Maaloufa soumia Mounir Sara Ibnelhaj Fatima Zohra El Wardi Asma Souidi Yakubu Aminu Dodo Malika Atigui Mina Amazal Abelhamid Khabbazi Hassan Demrati Ahmed Aharoune National School of Architecture Agadir New ComplexIbn Zohr UniversityAgadirMorocco Energy Materials and Sustainable Development(EMDD)Center for WaterNatural ResourcesEnvironment and Sustainable Development(CERNE2D)Mohammed V UniversityRabatMorocco Thermodynamics and Energetics Laboratory Faculty of ScienceIbn Zohr UniversityAgadirMorocco Architectural Engineering Department Najran UniversityNajranSaudi Arabia The Centre of Scientific and Engineering Research Najran UniversityNajranSaudi Arabia Physics Department LPMAT LaboratoryFaculty of Sciences Ain ChockHassan II UniversityCasablancaMorocco

The development of bio-sourced materials is essential to ensuring sustainable construction;it is considered a locomotive of the green ***,it is an abundant material in our country,to which very little attention is being *** work aims to valorize the waste of the trunks of banana trees to be used in ***,the physicochemical properties of the fiber,such as the percentage of crystallization and its morphology,have been determined by X-ray diffraction tests and scanning electron microscopy to confirm the potential and the impact of the mode of drying on the quality of the banana fibers,with the purpose to promote the use of this material in ***,the results obtained with the gypsum matrix allowed us to note a preponderant improvement in the composite’s thermal properties thanks to the variation of the banana fiber ***,the impact of the nature of the banana fiber distribution(either fiber mixed in matrix or fiber series model)on the flexural and compressive strengths of the composites was *** results obtained indicate that the insulation gain reaches up to 40%.It depends on the volume fraction and type of distribution of the banana ***,the thermal inertia of the composites developed,represented by thermal diffusivity and thermal effusivity,was *** indicate a gain of 40%and 25%,respectively,in terms of thermal diffusivity and thermal effusivity of the developed composites compared to plaster *** the mechanical properties,the flexural strength depends on the percentage of the volume fraction of banana fibers used,and it can reach 20%more than the flexural strength of plaster;nevertheless,there is a significant loss in terms of the compressive strength of the studied *** results obtained are confirmed by the microstructure of the fiber *** fact,the morphology of the banana fibers was improved by the drying *** reduces the amorphous area an

关键词： Biosourced materials fiber banana flexural strength mechanical properties open-air drying plaster thermal properties waste management

Production and Characterization of a Composite Based on Plaster and Juncus Maritimus Plant Fibers

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Fluid Dynamics & Materials Processing 2024年第9期20卷 2059-2076页

作者： Mina Amazal soumia Mounir Asma Souidi Malika Atigui Slimane Oubeddou Youssef Maaloufa Ahmed Aharoune Laboratory of Thermodynamics and Energetics Faculty of ScienceUniversity of Ibn ZohrDakhlaAgadir80000Morocco National School of Architecture Agadir New ComplexUniversity of Ibn ZohrDakhlaAgadir80000Morocco

Nowadays,materials with a limited impact on the environment are required in the construction *** the interesting properties of natural elements such as natural fibers,it seems advantageous to use them to reinforce materials while protecting the environment and guaranteeing economic *** these lines,this research was devoted to studying the effect of untreated natural fibers extracted from the Juncus maritimus plant(from Southern Morocco)on ***,the effect of the percentage of added fibers on the fluidity of the plaster was evaluated by means of the Marsh’s cone method,that is,by measuring the time taken by a known volume of plaster to flow from a cone through a short ***,the highly porous microstructure of the plaster was observed using a scanning electron microscope(SEM).The diffractogram of Juncus maritimus fibers was built by means of a X-ray diffraction(XRD)*** values obtained for the wet thermal conductivity of the composites decreased from 0.4853 W/m.K for the reference specimen to 0.4324 W/m K for a fiber volume content of 40%.The densities were calculated to determine the lightness of each *** mechanical strengths[flexural and compressive]were evaluated for different percentages of rush *** addition of 20%volume fiber was found to improve the flexural strength to 3.63 MPa compared to the sample without fiber(3.36 MPa),thereby ensuring good toughness of the considered ***,a reduction in compressive strength was observed,due to the poor adhesion between the fibers and the plaster matrix.

关键词： Composite material juncus maritimus plant plaster thermophysical properties mechanical properties microstructure

Numerical investigation of Ar–NH3 mixture in homogenous DBDs

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Plasma Science and Technology 2018年第3期20卷 72-77页

作者： Barkahoum LAROUCI soumia BENDELLA Ahmed BELASRI Laboratoire de Physique des Plasmas Materiaux Conducteurs et leurs Applications Faculte de PhysiqueUniversite des Sciences et de la Technologie d'Oran Mohamed Boudiaf USTO-MB El M'Naoeur B.P.1505 31 000 Oran Algeria

In this paper, a study of homogenous dielectric barrier discharge Ar–NHwas made in order to investigate the electrical and the physical characteristics of homogenous discharge at atmospheric pressure. The discharge model includes the electrical module and the chemical kinetic module. The results obtained by the present model were compared with experimental work. The evolution of the plasmas voltage, the species densities, and the concentration of charged species are analyzed and discussed.

关键词： plasma simulation dielectric barrier discharge Ar-NH3 mixture

Storytelling and environmental information: connecting schoolchildren and herpetofauna in Morocco

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Integrative Zoology 2009年第2期4卷 188-195页

作者： Lucia FANINI soumia FAHD Department of Evolutionary Biology University of FlorenceItaly Laboratory for Diversity and Conservation of Biological Systems Department of BiologyFaculty of ScienceAbdelmalek Essâadi UniversityTétouanMorocco

Northwestern Morocco is undergoing a sudden change in the level of infrastructure growth and pressure on the environment from increased *** ongoing changes are raising questions about how the ecosystem will react,and the relevant drivers of these *** Oued Laou valley in north-west Morocco hosts high landscape,species and human cultural *** Talassemtane National Park has been established to preserve the envi-ronment in this region;however,what information tools are available to children regarding this environment?The ecosystem is illustrated here using three components:herpetofauna(representing ecosystem components),prob-lems related to water quantity and quality(representing interactions within ecosystem components)and Talassemtane National Park(representing a case of ecosystem management).A children’s book was written on this topic,and when the book was delivered to pupils,a questionnaire was included,aimed at determining their sources of environ-mental *** results identified major changes in the sources of information utilized by children in this part of Morocco,a clear role of schools in explaining ecosystem components,and an increasing role of TV in environmental information *** role of the family was found to be less important than TV or *** major source of pupils’environmental knowledge is personal observation and hands-on experience,both for rural and urban *** are willing to discover and understand complex systems,and researchers should be encouraged to supply children with correct and up-to-date information on environmental systems,focusing at first on the local environment,as a background for sustainable development.

关键词： environmental education herpetofauna information sources Moroccan Rif primary school.

Thermomechanical Characterization of a Bio-Sourced Material Based on Clay and Alfa Fibers

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Fluid Dynamics & Materials Processing 2022年第6期18卷 1853-1863页

作者： Sara Ibn-Elhaj Yassine Elhamdouni soumia Mounir Abdelhamid Khabbazi EMDD_CERNE2D Mohammed V University in RabatHigher School of Technology SaléSalé11060Morocco National School of Architecture Agadir New Complex Ibn ZohrAgadir80000Morocco

Bio-based materials are of great interest owing to their abundance and the immense potential they display as an ideal alternative to widely used industrial construction materials(that directly and indirectly harm the environment).In this scope,an in-depth experimental study is presented here on clay-based materials aimed to enhance their properties through the addition of other bio-based components such as fibers,in the present case alfa *** thermal conductivity and mechanical properties(compressive and flexural tensile strengths)of the composite clay-alfa material are analyzed with the percentage of alfa fiber in the matrix ranging from 0%to 4%.It is concluded that a percentage of alfa fibers between 1%and 2%is the most effective to get the required optimization of thermal and mechanical behavior of this bio-based material.

关键词： Hot plate method in a steady-state regime clay composite mechanical alfa fiber

Isolated Bell's palsy-An unusual presentation of dengue infection

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Asian Pacific Journal of Tropical Medicine 2013年第1期6卷 82-84页

作者： soumia Peter Malhotra N Peter P Sood R Department of Medicine Christian Medical College & Hospital Department of Radiodiagnosis Christian Medical College & Hospital

Dengue fever is a very common arthropod-borne infection in tropical *** complications in dengue fever are relatively uncommon and among these,isolated cranial neuropathies have been reported only very *** present an unusual neurological complication of Bell’s palsy(lower motor neuron 7 th nerve palsy) associated with dengue *** the best of our knowledge,there have been very few documented cases of Flavivirus causing isolated Bell’s palsy.

关键词： Dengue infection Bell’s palsy

Influence of the Inclination Angle on Mixed Convection and Heat Transfer in a“T”Shaped Double Enclosure

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Fluid Dynamics & Materials Processing 2023年第7期19卷 1753-1774页

作者： M’Barka Mourabit Meryam Meknassi Soukaina Fekkar soumia Mordane Hicham Rouijaa El Alami Semma Polymer Physics and Critical Phenomena Laboratory Department of PhysicsFaculty of Sciences of Ben M’SikHassanⅡUniversityCasablancaMorocco Laboratory of Control and Mechanical Characterization of Materials and Structures National Higher School of Electricity and MechanicsHassanⅡUniversityCasablancaMorocco Laboratory of Electrical Systems and Telecommunications Department of Applied PhysicsFSTHassan 1^(st)UniversitySettatMorocco Laboratory of Engineering Industrial Management and Innovation FSTHassan 1^(st)UniversitySettatMorocco

The effect of the tilt angle on mixed convection and related heat transfer in a“T”shaped double enclosure with four heated obstacles on the bottom surface is numerically *** considered obstacles are constantly kept at a relatively high(fixed)temperature,while the cavity’s upper wall is *** finite volume approach is used to solve the mass,momentum,and energy equations with the SIMPLEC algorithm being exploited to deal with the pressure-velocity *** is put on the influence of the tilt angle on the solution symmetry,flow structure,and heat exchange through the *** following parameters and related ranges are considered:Rayleigh number 104≤Ra≤5.105,tilt angle 0°≤φ≤90°,Reynolds number 100≤Re≤1000,Prandtl number Pr=0.72,block height B=0.5,opening width C=0.15,and distance between blocks D=*** results reveal different branches of solutions on varying Re andφ.They also show that the symmetry of the solution regarding the P_(2)axis is retained for all cases with no tilt and for values of Re between 100 and 1000.

关键词： Mixed convection heat transfer inclination angle “T”shaped double cavity