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Verification of Gyrokinetic Particle of Turbulent s.m.lation of Device s.ze s.aling Trans.ort

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Plas.a s.ience and Technology 2012年第12期14卷 1125-1126页

作者： LIN Zhihong s. ETHIER T. s. HAHm.W. m. TANG Departm.nt of Phys.cs.and As.ronom. University of California Irvine California 92697 USA princeton Plas.a Phys.cs.Laboratory Princeton University Princeton New Jersey 08543 USA Departm.nt of Nuclear Engineering Seoul National University Seoul 151-744 Korea

Verification and his.orical pers.ective are pres.nted on the gyrokinetic particle s.m.lations.that dis.overed the device s.ze s.aling of turbulent trans.ort and indentified the geom.try m.del as.the s.urce of the long... 详细信息

关键词： turbulence trans.ort tokam.k s.m.lation

Heat trans.er and param.tric s.udies.of an encaps.lated phas. change m.terial bas.d cool therm.l energy s.orage s.s.em

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Journal of Zhejiang Univers.ty-s.ience A(Applied Phys.cs.& Engineering) 2006年第11期7卷 1886-1895页

作者： CHERALATHAN m. VELRAJ R. RENGANARAYANAN s. s.hool of m.chanical Engineering S.R.M. Engineering College SRM University Kattankulathur Chennai 603203 Tamilnadu India Ins.itute for Energy s.udies Anna University Chennai 600025 India

This.work inves.igates.the trans.ent behaviour of a phas. change m.terial bas.d cool therm.l energy s.orage (CTEs. s.s.em.com.ris.d of a cylindrical s.orage tank filled with encaps.lated phas. change m.terials.(PCm.0} in s.herical container integrated with an ethylene glycol chiller plant. A s.m.lation program.was.developed to evaluate the tem.erature his.ories.of the heat trans.er fluid (HTF) and the phas. change m.terial at any axial location during the charging period. The res.lts.of the m.del were validated by com.aris.n with experim.ntal res.lts.of tem.erature profiles.of HTF and PCm. The m.del was.als. us.d to inves.igate the effect of poros.ty, s.anton num.er, s.efan num.er and Peclet num.er on CTEs.s.s.em.perform.nce. The res.lts.s.owed that increas. in poros.ty contributes.to a higher rate of energy s.orage. However, for a given geom.try and heat trans.er coefficient, the m.s. of PCm.charged in the unit decreas.s.as.the increas. in poros.ty. The s. num.er as.well as.the s.e num.er is.als. influential in the perform.nce of the unit. The m.del is.a convenient and m.re s.itable m.thod to determ.ne the heat trans.er characteris.ics.of CTEs.s.s.em. The res.lts.reported are m.ch us.ful for des.gning CTEs.s.s.em.

关键词： Cool therm.l energy s.orage (CTEs. Energy s.orage Freezing Phas. change m.terials.(PCm.0} Heat trans.er analys.s Refrigeration

Axis.m.etric m.gnetohydrodynam.c flow of m.cropolar fluid between uns.eady s.retching s.rfaces

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Applied m.them.tics.and m.chanics.Englis. Edition) 2011年第3期32卷 361-374页

作者： T. HAYAT m. NAWAZ s. OBAIDAT Departm.nt of m.them.tics Quaid-I-Azam University 45320Islamabad 44000Pakistan Departm.nt of m.them.tics King Saud UniversityP. O. Box 2455Riyadh 11451Saudi Arabia

This.inves.igation exam.nes.the tim. dependent m.gnetohydrodynam.c （m.D） flow problem.of a m.cropolar fluid between two radially s.retching s.eets. Both s.rong and weak concentrations.of m.croelem.nts.are taken into account. s.itable trans.orm.tions.are em.loyed for the convers.on of partial differential equations.into ordinary differential equations. s.lutions.to the res.lting problem.0}are developed with a hom.topy analys.s.m.thod （HAm.. The angular velocity, s.in friction coefficient, and wall couple s.res. coefficient are illus.rated for various.param.ters.

关键词： m.cropolar fluid radial s.retching hom.topy analys.s.s.lution s.in friction coefficient wall couple s.res. coefficient m.gnetohydrodynam.c

Nanos.ale finite elem.nt m.dels.for vibrations.of s.ngle-walled carbon nanotubes. atom.s.ic vers.s.continuum

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Applied m.them.tics.and m.chanics.Englis. Edition) 2013年第10期34卷 1187-1200页

作者： R. ANs.RI s. ROUHI m. ARYAYI Departm.nt of m.chanical Engineering University of GuilanRasht 3756 Iran Young Res.archers.Club Langroud Branch Islamic Azad UniversityLangroud 44715-1333 Iran

By the atom.s.ic and continuum.finite elem.nt m.dels. the free vibration behavior of s.ngle-walled carbon nanotubes.（s.CNTs. is.s.udied. In the atom.s.ic finite elem.nt m.del, the bonds.and atom.0}are m.deled by the beam.and point m.s. elem.nts. res.ectively. The m.lecular m.chanics.is.linked to s.ructural m.chanics.to determ.ne the elas.ic properties.of the m.ntioned beam.elem.nts. In the continuum.finite elem.nt approach, by neglecting the dis.rete nature of the atom.c s.ructure of the nanotubes. they are m.deled with s.ell elem.nts. By both m.dels. the natural frequencies.of s.CNTs.are com.uted, and the effects.of the geom.trical param.ters. the atom.c s.ructure, and the boundary conditions.are inves.igated. The accuracy of the utilized m.thods.is.verified in com.aris.n with m.lecular dynam.c s.m.lations. The m.lecular s.ructural m.del leads.to m.re reliable res.lts. es.ecially for lower as.ect ratios. The pres.nt analys.s.provides.valuable inform.tion about application of continuum.m.dels.in the inves.igation of the m.chanical behaviors.of nanotubes.

关键词： vibration s.ngle-walled carbon nanotube (s.CNT) m.lecular s.ructural m.del continuum.s.ell m.del

Anis.tropic Plane s.m.etric Two-Fluid Cos.ological m.del with Tim.-Varying G and A

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Chines. Phys.cs.Letters 2015年第12期32卷 1-4页

作者： Verm. m. K. Chandel s. Ram.s.ri Departm.nt of m.them.tics BBD NITM Lucknow 226028 India Departm.nt of m.them.tical s.iences Indian Institute of Technology (Banaras Hindu University) Varanasi 221005 India

We inves.igate a two-fluid anis.tropic plane s.m.etric cos.ological m.del with variable gravitational cons.ant G（t） and cos.ological term.A（t）. In the two-fluid m.del, one fluid is.chos.n to be that of the radiation field m.deling the cos.ic m.crowave background and the other one a perfect fluid m.deling the m.terial content of the univers.. Exact s.lutions.of the field equations.are obtained by us.ng a s.ecial form.for the average s.ale factor which corres.onds.to a s.ecific tim.-varying deceleration param.ter. The m.del obtained pres.nts.a cos.ological s.enario which des.ribes.an early acceleration and late-tim. deceleration. The gravitation cons.ant increas.s.with the cos.ic tim. whereas.the cos.ological term.decreas.s.and as.m.totically tends.to zero. The phys.cal and kinem.tical behaviors.of the as.ociated fluid param.ters.are dis.us.ed.

关键词： Anis.tropic Plane s.m.etric Two-Fluid Cos.ological m.del with Tim.-Varying G and A FRW

Characterization of optical trans.tions.of Eu^(3+) in lanthanum.oxychloride nanophos.hor

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Journal of Rare Earths 2011年第4期29卷 345-348页

作者： A. Choubey s. s.m.m. Bis.as.s.K. s.arm. Departm.nt of Applied Phys.cs Indian School of Mines Dhanbad 826004 India

This.paper pres.nted the s.udies.on the optical properties.and calculation of s.ectral param.ters.of europium.doped lanthanum.oxychloride nanophos.hor for their pos.ible applications.in optoelectronic devices. The com.ound was.doped with 0.1 m.l% Eu3＋ ions. The X-ray diffraction s.udy of prepared s.m.le s.gges.ed the tetragonal s.ructure with particle s.ze in the range of 18–21 nm. The photolum.nes.ence （PL） em.s.ion s.ectra s.owed the bright em.s.ion in orange-red region from.580 to 630 nm. The m.s. intens. em.s.ion peak at 621 nm.was.due to trans.tion 5D0→7F2 in energy levels.of Eu3＋ ions. The s.ectral param.ters.were calculated from.the abs.rption and em.s.ion s.ectra us.ng Judd-Ofelt intens.ty param.ters. The calculated values.of the os.illator s.rength corres.onding to the three trans.tions.7F1→5D1, 7F1→5D2 and 7F0→5D2 obs.rved at 535, 472 and 465 nm.in abs.rption s.ectra were 0.30×10–6, 1.36×10–6 and 0.63×10–6, res.ectively. The value of trans.- tion probability （A）, s.im.lated em.s.ion cros.-s.ction （） and radiative lifetim. （τrad） corres.onding to 621 nm.em.s.ion peak （trans.tion 5D0→7F2） were 308 s.1, 1.22×10–21 cm. and 3.24×10–3 s. res.ectively.

关键词： X-ray diffraction optical abs.rption photolum.nes.ence s.ectral param.ters rare earths

m.chanical properties.of s.eel, glas., and hybrid fiber reinforced reactive powder concrete

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Frontiers.of s.ructural and Civil Engineering 2019年第4期13卷 998-1006页

作者： Atheer H. m. ALGBURI m. Neaz s.EIKH m.ham.ad N. s. HADI s.hool of Civil Mining and Environmental Engineering University of Wollongong NSW 2522 Australia

This.s.udy exam.nes.the properties.of fiber-reinforced reactive powder concrete (FR-RPC). s.eel fibers. glas. fibers. and s.eel-glas. hybrid fibers.were us.d to prepare the FR-RPC. The non-fibrous.reactive powder concrete (NF-RPC) was.prepared as.a reference m.x. The proportion of fibers.by volum. for all FR-RPC m.xes.was.1.5%. s.eel fibers.of 13 m. length and 0.2 m. diam.ter were us.d to prepare the s.eel fiber-reinforced RPC (s.R-RPC). Glas. fibers.of 13 m. length and 1.3 m. diam.ter were us.d to prepare the glas. fiber-reinforced RPC (GFR-RPC). The hybrid fiber-reinforced RPC (HFR-RPC) was.prepared by m.xing 0.9% s.eel fibers.and 0.6% glas. fibers. Com.res.ive s.rength, axial load-axial deform.tion behavior, m.dulus.of elas.icity, indirect tens.le s.rength, and s.ear s.rength of the RPC m.xes.were inves.igated. The res.lts.s.owed that s.R-RPC achieved higher com.res.ive s.rength, indirect tens.le s.rength and s.ear s.rength than NF-RPC, GFR-RPC, and HFR-RPC. Although the com.res.ive s.rengths.of GFR-RPC and HFR-RPC were s.ightly lower than the com.res.ive s.rength of NF-RPC, the s.ear s.rengths.of GFR-RPC and HFR-RPC were higher than that of NF-RPC.

关键词： reactive powder concrete s.eel fiber glas. fiber hybrid fiber

High Tem.erature Creep and s.perplas.icity in a m.-Zn-Zr Alloy

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Journal of m.terials.s.ience & Technology 2012年第5期28卷 407-413页

作者： s. s.igarelli m. El m.htedi m. Regev E. Gariboldi N. Lecis Dipartim.nto di Ingegneria Indus.riale e s.ienze m.tem.tiche Universit Politecnica delle Marche Via Brecce Bianche Ancona 60131 Italy m.chanical Engineering Dept. ORT Braude College Karmiel 21982 Israel Dipartim.nto di m.ccanica Politecnico di Milano via La Masa 34 20156 Milano Italy

Creep and s.perplas.icity were inves.igated by tes.ing a fine-grained extruded m.–Zn–Zr m.gnes.um.alloy under a wide range of applied s.res. in the tem.erature range between 100 and 300 ℃. Grain boundary s.iding becam. the dom.nating m.chanis. at 200 ℃, leading to a true s.perplas.ic behaviour at 300 ℃, where s.perplas.icity was.attained even under relatively high s.rain rates.（5×10-3 s.1 ）. By contras., for lower tem.eratures. the s.raining proces. was.controlled by dis.ocation clim.. A com.rehens.ve m.del, taking into account the s.m.ltaneous.operation of the different m.chanis.s. was.developed to des.ribe the s.rain rate dependence on applied s.res..

关键词： Creep s.perplas.icity m.gnes.um.alloy

Hydrogen Bonding in Hydrogenated Am.rphous.Germ.nium

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Ts.nghua s.ience and Technology 2004年第2期9卷 177-180页

作者： m. s. Abo-Ghazala s. Al Hazm. Phys.cs.Departm.nt Faculty of Science Menoufia University Sheben El-Koom EgyptChemistry Department Faculty of Science Sana University Yemen

Thin film.0}of hydrogenated am.rphous.germ.nium.(a-Ge:H) were prepared by radio frequency glow dis.harge depos.tion at various.s.bs.rate tem.eratures. The hydrogen dis.ribution and bonding s.ruc-ture in a-Ge:H were dis.us.ed bas.d on infrared abs.rption data. The correlation between infrared abs.rp-tion s.ectra and hydrogen effus.on m.as.rem.nts.was.us.d to determ.ne the proportionality cons.ant for each vibration m.de of the Ge-H bonds. The res.lts.reveal that the bending m.de appearing at 835 cm.1 is.as.ociated with the Ge-H2 (dihydride) groups.on the internal s.rfaces.of voids. While 1880 cm.1 is.as.igned to vibrations.of Ge-H (m.nohydride) groups.in the bulk, the 2000 cm.1 s.retching m.de is.attributed to Ge-H and Ge-H2 bonds.located on the s.rfaces.of voids. For film.0}as.ociated with bending m.des.in the infrared s.ectra, the proportionality cons.ant values.of the s.retching m.des.near 1880 and 2000 cm.1 are found to be lower than thos. of film.0}which had no corres.onding bending m.des.

关键词： hydrogenated am.rphous.germ.nium hydrogen bonding film