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On the Dynamics of a Viscoelastic Fluid-Conveying Nanotube

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Fluid Dynamics & materials Processing 2022年第4期18卷 1137-1151页

作者： Ola Adil Ibrahim Gunawan Widjaja Abdulhussien N.Alattabi Krishanveer Singh Yasser Fakri mustafa P.A.Krovopuskov mustafa m.kadhim General Directorate of Curricula-ministry of Education-Iraq Baghdad10020Iraq Senior Lecturer Faculty of Public Health Universitas Indonesia/Faculty of Law Universitas Krisnadwipayana Jakarta11440Indonesia College of Petroleum Engineering Al-Ayen UniversityThi-Qar64005Iraq GLA University mathura-India MathuraChaumuhanUttar Pradesh281406India Department of Pharmaceutical Chemistry College of PharmacyUniversity of MosulMosul41002Iraq Lipetsk State Technical University Lipetsk398600Russia Department of Dentistry Kut University CollegeKutWasit52001Iraq

The objective of the presented study is to perform a vibration analysis and investigate the stability of a viscoelastic-fluid conveying pipe with an intermediate support.The mathematical model is elaborated in the framework of the Euler-Bernoulli beam theory in combination with the Kelvin-Voight viscoelastic approach.The resulting differential equation of motion and the related boundary conditions and compatibility conditions in the mid-span support are solved analytically using a power series method.The results show that an intermediate support located atξ_(s)=0.1 andξ_(s)=0.5 increases the critical velocity up to 35%and 50.15%,respectively.Also,the non-dimensional critical velocity for an intermediate support atξ_(s)=0.1 is 4.83.

关键词： Fluid conveying carbon nanotube viscoelastic structural damping natural frequencies analytical method

Systematic Investigation of Two-Phase Flow in Special Channels

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Fluid Dynamics & materials Processing 2022年第4期18卷 1039-1048页

作者： Oleg R.Kuzichkin muneam Hussein Ali Ayad F.Alkaim Lis m.Yapanto Gabdrakhman H.Valiev L.S.Abdullah mustafa m.kadhim Department of Information and Robototechnic Systems Belgorod State UniversityBelgorod308015Russia Al-Nisour University College Baghdad10012Iraq College of Science for Women University of BabylonBabil51002Iraq Departement of Aquatic management Faculty of Fisheries and Marine Science Universitas Negeri GorontaloGorontalo96128Indonesia Kazan Federal University Kazan420008Russia Lipetsk State Technical University Lipetsk398600Russia Department of Dentistry Kut University CollegeKutWasit52001Iraq

A systematic study of two-phase(water-air)currents in open channels(water-air)has been conducted by means of experiments and numerical simulations.A dedicated device has been designed and manufactured on purpose.The numerical simulations have been based on the solution of a system of mass,momentum and energy balance equations for a two-phase fluid.The effect of different influential parameters has been explored,namely,velocity and dimensions of the channel,surface pressure and tension.

关键词： Two-phase special channels systematic study pressure drop

Application of Vortex Generators to Remove Heat Trapped in Closed Channels

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Fluid Dynamics & materials Processing 2023年第1期19卷 15-24页

作者： Alim Al Ayub Ahmed Salim Oudah mezan Binyamin murtadha Doghiam Abdullah Elena Tesleva Linar G.Akhmetov Rustem Zalilov mustafa m.kadhim Abduladheem Turki Jalil School of Accounting Jiujiang UniversityJiujiang332000China General Directorate of Education in Al-muthanna Governorate Ministry of EducationSamawah66001Iraq Department of mechanical Engineering Faculty of Science and TechnologyUniversitas Muhammadiyah Kalimantan TimurSamarinda75124Indonesia College of Petroleum Engineering Al-Ayen UniversityThi-Qar64001Iraq National Research Tomsk Polytechnic University Tomsk634050Russia Kazan Federal University Kazan420008Russian Nosov magnitogorsk State Technical University Magnitogorsk455000Russia Department of Dentistry Kut University CollegeKutWasit52001Iraq College of Technical Engineering The Islamic UniversityNajaf7003Iraq Department of Pharmacy OsolAldeen University CollegeBaghdad993P+PWXIraq Faculty of Biology and Ecology Yanka Kupala State University of GrodnoGrodno230023Belarus

The utilization of vortex generators to increase heat transfer from cylinders installed inside a duct is investigated.In particular,a channel containing eight cylinders with volumetric heat sources is considered for different values of the Reynolds number.The effective possibility to use vortex generators with different sizes to increase heat transfer and,consequently,reduce the surface temperature of the cylinders is examined.Also,the amount of pressure drop inside the channel due to the presence of vortex generators is considered and compared with the cases without vortex generators.The results show that although the addition of generators increases the pressure drop,it strongly contributes to increase the heat transfer coefficient inside the duct(up to 80–90%).

关键词： Vortex generators heat trapped temperature of hot surfaces heat transfer

Thermal Conductivity and Dynamic Viscosity of Highly mineralized Water

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Fluid Dynamics & materials Processing 2022年第3期18卷 851-866页

作者： Dadang mohamad mohammed Abed Jawad John William Grimaldo Guerrero Tonton Taufik Rachman Huynh Tan Hoi Albert Kh.Shaikhlislamov mustafa m.kadhim Saif Yaseen Hasan A.Surendar Building Engineering Educatation Universitas Pendidikan IndonesiaBandung45363Indonesia Al-Nisour University College Iraq10004Baghdad Departamento de Energía Universidad de la CostaBarranquilla080002Colombia Universitas masoem Bandung45363Indonesia Department of Language FPT UniversityHanoi700000Vietnam Kazan Federal University RussiaKazan420000Russia Dentistry Department Kut University CollegeKutWasitIraqCollege of Technical EngineeringThe Islamic UniversityNajaf54001Iraq National University of Science and Technology Dhi-Qar64001Iraq Department of Pharmacology Saveetha Dental College and HospitalSaveetha Institute of Medical and Technical SciencesChennai600056India

Further development in the field of geothermal energy require reliable reference data on the thermophysical properties of geothermal waters,namely,on the thermal conductivity and viscosity of aqueous salt solutions at temperatures of 293–473 K,pressures Ps=100 mPa,and concentrations of 0–25 wt.%.Given the lack of data and models,especially for the dynamic viscosity of aqueous salt solutions at a pressure of above 40 mPa,generalized formulas are presented here,by which these gaps can be filled.The article presents a generalized formula for obtaining reliable data on the thermal conductivity of water aqueous solutions of salts for Ps=100 mPa,temperatures of 293–473 K and concentrations of 0%–25%(wt.%),as well as generalized formulas for the dynamic viscosity of water up to pressures of 500 mPa and aqueous solutions of salts for Ps=100 mPa,temperatures 333–473 K,and concentration 0%–25%.The obtained values agree with the experimental data within 1.6%.

关键词： Thermal conductivity dynamic viscosity water-salt systems aqueous solutions of salts high pressure multicomponent water-salt system

Solute transport and geochemical modeling of the coastal quaternary aquifer, Delta Dahab Basin, South Sinai, Egypt

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Acta Geochimica 2024年第1期43卷 16-39页

作者： Amira Samy mustafa Eissa Seham Shahen moustafa m.Said Rabab m.Abou-shahaba Division of Water Resources and Arid Land Department of HydrogeochemistryDesert Research CenterCairoEgypt Egypt Desalination Research Center of Excellence Desert Research CenterCairoEgypt Center for Water Supply Studies S&E-Physical&Environmental SciencesTexas A&M University Corpus ChristiCorpus ChristiUSA Department of Chemistry Faculty of Science(Girls)Al-Azhar UniversityYousef Abbas StrNasr CityP.O.Box:11754CairoEgypt

The wadi dahab delta is in a dry, arid coastal zone within Egypt’s south Sinai Peninsula’s eastern portion. The primary water source is the Quaternary coastal alluvial aquifer. The groundwater salinity varies from 890to 8213 mg/L, with a mean value of 3417 mg/L. The dissolved major ions have been used to calculate the seawater mixing index(SWmI) using a linear equation that discriminates the groundwater mostly affected by water–rock interaction(SWmI 1>) and other samples mixed with Seawater(SWmI mposition of groundwater for specifically chosen groundwater samples ranges from-0.645‰ to +5.212‰ for δ^(18)O and from-9.582‰ to + 22.778‰ for δ^(2)H, where the seawater represented by a Red Sea water sample(δ^(18)O + 1.64‰-δ^(2)H + 9.80‰) and reject brine water are considerably enriched the isotopic groundwater values. The geochemical NETPATH model constrained by the dissolved significant ions, isotopes, and the rock aquifer forming minerals as phases indicate the mixing percent with the seawater ranges from 9% to 97% of seawater from 91% to 3% of original recharge water. According to the SEAWAT 3-D flow models, seawater has penetrated the Northeastern Dahab delta aquifer, with the intrusion zone extending1500 m inland. The salt dissolution, upwelling of saline water, recharge from the upstream mountain block, and seawater encroachment are the primary aspects contributing to the deterioration of groundwater quality. These findings may have significance for effective groundwater withdrawal management in arid locations worldwide with similar hydrogeological systems.

关键词： Groundwater geochemistry Seawater intrusion Solute transport SEAWAT

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Intelligent Solution System for Cloud Security Based on Equity Distribution:model and Algorithms

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Computers, materials & Continua 2024年第1期78卷 1461-1479页

作者： Sarah mustafa Eljack mahdi Jemmali mohsen Denden mutasim Al Sadig Abdullah m.Algashami Sadok Turki Department of Computer Science and Information College of Science at ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Computer Science College of Computing and InformaticsUniversity of SharjahSharjahUnited Arab Emirates Higher Institute of Computer Science and mathematics University of MonastirMonastir5000Tunisia mars Laboratory University of SousseSousseTunisia Department of Logistic and maintenance UFR MIM at MetzUniversity of LorraineMetzFrance Department of Computer and Information Technologies College of Telecommunicationand Information Riyadh CTITechnical and Vocational Training Corporation TVTCRiyadh12464Saudi Arabia Department of Computer Science Higher Institute of Applied Sciences of SousseSousse UniversitySousse4000Tunisia

In the cloud environment,ensuring a high level of data security is in high demand.Data planning storage optimization is part of the whole security process in the cloud environment.It enables data security by avoiding the risk of data loss and data overlapping.The development of data flow scheduling approaches in the cloud environment taking security parameters into account is insufficient.In our work,we propose a data scheduling model for the cloud environment.Themodel is made up of three parts that together help dispatch user data flow to the appropriate cloudVms.The first component is the Collector Agent whichmust periodically collect information on the state of the network links.The second one is the monitoring agent which must then analyze,classify,and make a decision on the state of the link and finally transmit this information to the scheduler.The third one is the scheduler who must consider previous information to transfer user data,including fair distribution and reliable paths.It should be noted that each part of the proposedmodel requires the development of its algorithms.In this article,we are interested in the development of data transfer algorithms,including fairness distribution with the consideration of a stable link state.These algorithms are based on the grouping of transmitted files and the iterative method.The proposed algorithms showthe performances to obtain an approximate solution to the studied problem which is an NP-hard(Non-Polynomial solution)problem.The experimental results show that the best algorithm is the half-grouped minimum excluding(HmE),with a percentage of 91.3%,an average deviation of 0.042,and an execution time of 0.001 s.

关键词： Cyber-security cloud computing cloud security algorithms heuristics

Comprehensive analysis of glacier recession(2000-2020)in the Nun-Kun Group of Glaciers,Northwestern Himalaya

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Journal of mountain Science 2024年第3期21卷 768-785页

作者： Shakil Ahmad ROmSHOO Ummer AmEEN mustafa Hameed BHAT Tariq ABDULLAH Department of Geoinformatics University of KashmirSrinagarKashmir 190006India Islamic University of Science and Technology AwantiporaKashmir 192122India Centre of Excellence for Glacier Studies in the Western Himalaya University of KashmirSrinagarKashmir 190006India

Himalayan glaciers are shrinking rapidly,especially after 2000.Glacier shrinkage,however,shows a differential pattern in space and time,emphasizing the need to monitor and assess glacier changes at a larger scale.In this study,changes of 48 glaciers situated around the twin peaks of the Nun and Kun mountains in the northwestern Himalaya,hereafter referred to as Nun-Kun Group of Glaciers(NKGG),were investigated using Landsat satellite data during 2000-2020.Changes in glacier area,snout position,Equilibrium Line Altitude(ELA),surface thickness and glacier velocity were assessed using remote sensing data supplemented by field observations.The study revealed that the NKGG glaciers have experienced a recession of 4.5%±3.4%and their snouts have retreated at the rate of 6.4±1.6 m·a^(-1).Additionally,there was a 41%increase observed in the debris cover area during the observation period.Using the geodetic approach,an average glacier elevation change of-1.4±0.4 m·a^(-1)was observed between 2000 and 2012.The observed mass loss of the NKGG has resulted in the deceleration of glacier velocity from 27.0±3.7 m·a^(-1)in 2000 to 21.2±2.2 m·a^(-1)in 2020.The ELA has shifted upwards by 83.0±22 m during the period.Glacier morphological and topographic factors showed a strong influence on glacier recession.Furthermore,a higher recession of 12.9%±3.2%was observed in small glaciers,compared to 2.7%±3.1%in larger glaciers.The debris-covered glaciers showed lower shrinkage(2.8%±1.1%)compared to the clean glaciers(9.3%±5%).The glacier depletion recorded in the NKGG during the last two decades,if continued,would severely diminish glacial volume and capacity to store water,thus jeopardizing the sustainability of water resources in the basin.

关键词： Nun-Kun range Glacier recession Glacier snout Remote Sensing Himalaya Glacier velocity

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Role of compositional changes on thermal,magnetic,and mechanical properties of Fe-P-C-based amorphous alloys

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Chinese Physics B 2022年第1期31卷 472-479页

作者： Indah Raya Supat Chupradit mustafa m.kadhim mustafa Z mahmoud Abduladheem Turki Jalil Aravindhan Surendar Sukaina Tuama Ghafel Yasser Fakri mustafa Alexander N Bochvar Chemistry Department Faculty of Mathematics and Natural ScienceHasanuddin UniversityMakassarSouth Sulawesi90245Indonesia Department of Occupational Therapy Faculty of Associated Medical SciencesChiang Mai UniversityChiang Mai50200Thailand Department of Dentistry Kut University CollegeKutWasit52001Iraq College of Technical Engineering The Islamic UniversityNajafIraq Department of Pharmacy Osol Aldeen University CollegeBaghdadIraq Department of Radiology and medical Imaging College of Applied Medical SciencesPrince Sattam Bin Abdulaziz UniversityAl-Kharj 11942Saudi Arabia Faculty of Health University of CanberraCanberraACTAustralia Faculty of Biology and Ecology Yanka Kupala State University of Grodno230023 GrodnoBelarus Department of Pharmacology Saveetha Dental College and HospitalSaveetha Institute of Medical and Technical SciencesChennaiIndia Scientific Research Center Al-Ayen UniversityThi-Qar64001Iraq Department of Pharmaceutical Chemistry College of PharmacyUniversity of MosulMosulIraq Department of materials Physics Eotvos Lorand UniversityPázmány Péter sétány 1/ABudapest1117Hungary

This work aimed to tune the comprehensive properties of Fe-P-C-based amorphous system through investigating the role of microalloying process on the crystallization behavior,glass forming ability(GFA),soft magnetic features,and mechanical properties.Considering minor addition of elements into the system,it was found that the simultaneous microalloying of Ni and Co leads to the highest GFA,which was due to the optimization of compositional heterogeneity and creation of near-eutectic composition.moreover,the FeCoNiCuPC amorphous alloy exhibited the best anelastic/viscoplastic behavior under the nanoindentation test,which was owing to the intensified structural fluctuations in the system.However,the improved plasticity by the extra Cu addition comes at the expense of magnetic properties,so that the saturation magnetization of this alloying system is significantly decreased compared to the FeCoPC amorphous alloy with the highest soft magnetic properties.In total,the results indicated that a combination of added elemental constitutes,i.e.,Fe69Co5Ni5Cu1P13C7 composition,provides an optimized state for the comprehensive properties in the alloying system.

关键词： Fe-based alloy saturation magnetization glass forming ability viscoplastic

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From longan peel waste to energy storage: Porous activated carbon as a cathode matrix for advanced Li/Na-selenium batteries

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Progress in Natural Science:materials International 2024年第2期34卷 329-337页

作者： mustafa Khan Suxia Yan mujahid Ali Faisal mahmood Yang Zheng Xiaohui Song Guochun Li Junfeng Liu Yong Wang Institute for Energy Research Jiangsu University School of Energy and Power Engineering Jiangsu University School of materials Science and Engineering Hefei University of Technology

This paper explores the potential of Longan peel waste（LPw） as a sustainable and cost-effective matrix for selenium-based cathodes in Li-Se and Na-Se batteries.Following activation,we created LP2—a designation for the carbon precursor derived from LPw,activated at a 1:2 ratio of carbonized LPw to KOH.This nomenclature,where'LP' stands for 'Longan peel' and '2' reflects the optimization of this ratio,led to a hierarchical porous structure with an average pore size of 3.0307 nm and a significant BET surface area of 111.9386 m2g-1Selenium was incorporated into the LP2matrix using a simple melt diffusion technique,yielding the composite Se@LP2.In Li-Se batteries,Se@LP2exhibited an initial discharge capacity of 1033.75 mAh g-1at 0.1C.At a 1C rate,the composite demonstrated a capacity retention of 301.14 mAh g-1after 550 cycles and 380.91 mAh g-1after 100 cycles.moreover,for Na-Se batteries,the composite showcased a capacity retention of 347.18 mAh g-1after 100 cycles at0.1C.These findings underscore LP2's potential as a viable and efficient matrix for selenium-based cathodes,revealing promising prospects for the advancement of highly efficient Li-Se and Na-Se batteries.

关键词： Hierarchical porous structure Li/Na-Se batteries Longan peel waste melt diffusion technique Selenium-based cathode