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Performance enhancement of a DC-operated micropump with electroosmosis in a hybrid nanofluid:fractional Cattaneo heat flux problem

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Applied Mathematics and Mechanics(English Edition) 2022年第6期43卷 931-944页

作者： A.M.ALSHARiF A.i.ABDELLATEEF Y.A.ELMABOUD S.i.ABDELSALAM Department of Mathematics and Statistics College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Applied Mathematics and Science Faculty of EngineeringNational University of Science and TechnologySeeb 111Sultanate of Oman Department of Mathematics College of Science and Arts at KhulisUniversity of JeddahJeddah 21589Saudi Arabia Department of Mathematics Faculty of ScienceAl-Azhar University(Assiut Branch)Assiut 71254Egypt Department of Basic Science Faculty of EngineeringThe British University in EgyptCairo 11837Egypt

The purpose of this investigation is to theoretically shed some light on the effect of the unsteady electroosmotic flow(EOF)of an incompressible fractional secondgrade fluid with low-dense mixtures of two spherical nanoparticles,copper,and *** flow of the hybrid nanofluid takes place through a vertical micro-channel.A fractional Cattaneo model with heat conduction is *** the DC-operated micropump,the Lorentz force is responsible for the pressure difference through the *** Debye-H¨ukel approximation is utilized to linearize the charge *** semianalytical solutions for the velocity and heat equations are obtained with the Laplace and finite Fourier sine transforms and their numerical *** addition to the analytical procedures,a numerical algorithm based on the finite difference method is introduced for the given domain.A comparison between the two solutions is *** variations of the velocity heat transfer against the enhancements in the pertinent parameters are thoroughly investigated *** is noticed that the fractional-order parameter provides a crucial memory effect on the fluid and temperature *** present work has theoretical implications for biofluid-based microfluidic transport systems.

关键词： hybrid nanofluid fractional Cattaneo heat flux Caputo-Fabrizio derivative

Anticorrosion properties and thin film composite deposition of ZnSiC-Cr_3C_2 coating on mild steel

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Defence Technology（防务技术） 2019年第1期15卷 106-110页

作者： A.A.Ayoola O.S.i.Fayomi A.P.i.Popoola Chemical Engineering Department Covenant University Chemical Metallurgical and Materials Engineering DepartmentTshwane University of Technology Mechanical Engineering Department Covenant University

This work considered the influence of Cr3 C2 particle loading on microstructure and mechanical properties of Zn-SiC-Cr3 C2 nanocomposite produced via electrocodeposition are investigated. The surface nature of the nanocomposite coatings were characterized using scanning electron microscope(SEM)coupled with the energy dispersive spectrometer(EDS). Abrasive wear behaviour and hardness property of Zn-SiC-Cr3 C2 nanocomposite produced were investigated using CERT UMT-2 multi-functional tribological tester and Dura Scan hardness tester. The corrosion property was evaluated through linear polarization approach. The result showed that the coatings exhibited good stability and Cr_3 C_2 nanocomposite loading significantly improved the micro structural performance, hardness property,wear resistance as well as corrosion resistance of the coatings.

关键词： Zn-SiC-Cr3C2 Electrodeposition Coatings Corrosion resistance Hardness

Hadron program at COMPASS

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Chinese Physics C 2010年第9期34卷 1375-1378页

作者： i.Uman Ludwig-Maximilians-Universitt München D-80799 Germany

The fixed target COMPASS experiment at CERN offers the opportunity to search for exotic mesons and glueball candidates in the light quark sector with unprecedented *** results from the 2008 data taken with an incoming negative hadron beam （190 GeV/c,mainly pions） on a liquid hydrogen target are *** detectors dedicated to hadron beam measurements have been *** give access to rare neutral and kaonic *** amplitude analysis which will allow to fit simultaneously diffractively and/or centrally produced resonances will be described and compared with those used in the CERN WA102 and BNL E852 experiments.

关键词： hadron spectroscopy light meson spectrum gluonic excitations exotic mesons hybrids

Photoproduction of mesons off the deuteron:quasifree and coherent processes

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Chinese Physics C 2009年第12期33卷 1340-1344页

作者： i. Jaeglé Departmement of Physics University of Basel CH-4056 Basel Switzerland

Photoproduction of mesons off the deuteron has been investigated at a tagged photon beam of the Bonn ELSA accelerator with the combined Crystal Barrel - TAPS electromagnetic calorimeter for incident photon energies up to 2.5 GeV. The mesons have been detected in coincidence with recoil protons, neutrons and deuterons. This allow the measurement of meson production reactions off the quasifree nucleons bound in the deutron, as well as the coherent production off the deuteron. The comparison of quasifree proton reactions to free proton reactions can confirm or invalidate possible nuclear effects on the extracted cross section reactions. Furthermore the isospin composition of a resonance can be estimated from the comparison of quasifree proton and neutron reactions. The quasifree photoproduction of the η＇ and π°η mesons off nucleons and the coherent photoproduction of π°η--pairs off the deuteron are discussed.

关键词： quasifree coherent photoproduction η' π°η neutron proton deuteron

Multiphoton quantum dynamics of many-electron atomic and molecular systems in intense laser fields

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Chinese Physics B 2020年第8期29卷 115-126页

作者： Peng-Cheng Li Shih-i Chu Research Center for Advanced Optics and Photoelectronics Department of PhysicsCollege of ScienceShantou UniversityShantou 515063China Key Laboratory of intelligent Manufacturing Technology of MOE Shantou UniversityShantou 515063China Department of Chemistry University of KansasLawrenceKansas 66045USA

We present the recent new developments of time-dependent Schrödinger equation and time-dependent density-functional theory for accurate and efficient treatment of the electronic structure and time-dependent quantum dynamics of many-electron atomic and molecular systems in intense laser *** extend time-dependent generalized pseudospectral(TDGPS)numerical method developed for time-dependent wave equations in multielectron *** TDGPS method allows us to obtain highly accurate time-dependent wave functions with the use of only a modest number of spatial grid point for complex quantum dynamical *** usefulness of these procedures is illustrated by a few case studies of atomic and molecular processes of current interests in intense laser fields,including multiphoton ionization,above-threshold ionization,high-order harmonic generation,attosecond pulse generation,and quantum dynamical processes related to multielectron *** conclude this paper with some open questions and perspectives of multiphoton quantum dynamics of many-electron atomic and molecular systems in intense laser fields.

关键词： multiphoton ionization above-threshold ionization high-order harmonic generation attosecond pulse generation

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法国船闸述评

水道港口 1980年第2期 1-14页

作者： Robert leclercq Nancy航运局负责人主任土木工程师[法国]

人们知道法国在19世纪就已基本形成了一个很发达的航道网,这个航道网可以容许38.50米长的法兰达斯货船(300吨)通航,航道网中的船闸一般是:38.50米的有效长度,5.20米的宽度,1.80—2.0米的吃水深度,2—3米的落差高度。在这个小船航道网中,

关键词：船闸因河低水头水闸人字门船闸闸门法国法兰西共和国

Pseudospin symmetric solutions of the Dirac equation with the modified Rosen-Morse potential using Nikiforov-Uvarov method and supersymmetric quantum mechanics approach

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Chinese Physics B 2022年第5期31卷 107-112页

作者： Wen-Li Chen i B Okon School of intelligent Science and information Engineering Xi’an Peihua UniversityXi’an 710125China Theoretical Physics Group Department of PhysicsUniversity of UyoNigeria

Employing the Pekeris-type approximation to deal with the pseudo-centrifugal term,we analytically study the pseudospin symmetry of a Dirac nucleon subjected to equal scalar and vector modified Rosen-Morse potential including the spin-orbit coupling term by using the Nikiforov-Uvarov method and supersymmetric quantum mechanics *** complex eigenvalue equation and the total normalized wave functions expressed in terms of Jacobi polynomial with arbitrary spin-orbit coupling quantum number k are presented under the condition of pseudospin *** eigenvalue equations for both methods reproduce the same result to affirm the mathematical accuracy of analytical *** numerical solutions obtained for different adjustable parameters produce degeneracies for some quantum number.

关键词： Dirac equation modified Rosen-Morse potential Nikiforov-Uvarov method supersymmetric quantum mechanics approach

High Current and High intensity ion Beam Sources and Their Technological Applications

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稀有金属材料与工程 2011年第S4期40卷 142-146页

作者： A.i.Ryabchikov National Research Tomsk Polytechnic University TomskRussia

High-current ion beams have become a powerful tool for improving the surface properties of different *** prospects of wide commercial use of such beams for material treatment is not only due to the possibility of improving their properties,but,also for economic *** achieve a high throughput and reduce the cost on ion beam material treatment,ion beams of high average and pulsed power are *** paper gives an overview of work on generation of pulsed and repetitively pulsed beams of accelerated ions with currents ranging from fractions of an ampere to several tens of kA and with pulse duration from several tens of nanoseconds to several hundreds of microseconds.A number of different methods of materials surface properties modification using high power and intense ion beam and plasma are considered.

关键词： high current and intense ion beams plasma modification of materials coating deposition microparticle evaporation

Effect of graphene addition on the physicomechanical and tribological properties of Cu nanocomposites

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international Journal of Minerals,Metallurgy and Materials 2022年第1期29卷 161-167页

作者： Adnan i.Khdair A.ibrahim Mechanical Engineering Department Faculty of EngineeringKing Abdulaziz UniversityP.O.Box 80204JeddahSaudi Arabia Jordan University of Science and Technology Mech.Eng.Dep.P.O.Box 3030Irbid 2011Jordan Higher Technological institute Tenth of Ramadan CityEgypt

This paper presents an experimental investigation of the mechanical and tribological properties of Cu-graphene nanosheets(GN)*** employed the electroless coating process to coat GNs with Ag particles to avoid its reaction with Cu and the formation of intermetallic *** analyzed the effect of GN content on the structural,mechanical,and tribological properties of the produced *** showed that the electroless coating process is an efficient technique to avoid the reaction between Cu and C and the formation of intermetallic *** addition of GNs significantly improves the mechanical and tribological properties of Cu ***,the addition of GNs needs to be done carefully because,after a certain threshold value,the mechanical and tribological properties are negatively *** optimum GN content is determined to be 0.5vol%,at which hardness,wear rate,and coefficient of friction are im-proved by 13%,81.9%,and 49.8%,respectively,compared with Cu *** improved properties are due to the reduced crys-tallite size,presence of GNs,and homogenous distribution of the composite constituents.

关键词： copper graphene nanosheets coating mechanical properties wear