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Nonlinear three-dimensional stretched flow of an Oldroyd-b.fluid with convective condition, thermal radiation, and mixed convection

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Applied Mathematics and Mechanics(English Edition) 2017年第7期38卷 969-980页

作者： b. MAHANTHEsH b. J. GIREEsHA s.A. sHEHZAD F.M. Ab.AsI R. s. R. GORLA Department of Mathematics Christ University Bangalore 560029 Karnataka India Department of studies and Research in Mathematics Kuvempu University Shankarghatta 577451 Karnataka India Department of Mathematics COMSATS Institute of Information Technology Sahiwal 57000 Pakistan Department of Mathematics COMSATS Institute of Information Technology Islamabad 44000 Pakistan Department of Mechanical and Civil Engineering Purdue University Northwest Indiana 46391 U. S. A

The effect of non-linear convection in a laminar three-dimensional Oldroyd-b.fluid flow is addressed. The heat transfer phenomenon is explored b. considering the non-linear thermal radiation and heat generation/ab.orption. The b.undary layer as- sumptions are taken into account to govern the mathematical model of the flow analy- sis. some suitab.e similarity variab.es are introduced to transform the partial differen- tial equations into ordinary differential systems. fifth-order techniques with the shooting method The Runge-Kutta-Fehlb.rg fourth- and are used to ob.ain the solutions of the dimensionless velocities and temperature. The effects of various physical parameters on the fluid velocities and temperature are plotted and examined. A comparison with the exact and homotopy perturb.tion solutions is made for the viscous fluid case, and an excellent match is noted. The numerical values of the wall shear stresses and the heat transfer rate at the wall are tab.lated and investigated. The enhancement in the values of the Deb.rah numb.r shows a reverse b.havior on the liquid velocities. The results show that the temperature and the thermal b.undary layer are reduced when the non- linear convection parameter increases. The values of the Nusselt numb.r are higher in the non-linear radiation situation than those in the linear radiation situation.

关键词： nonlinear thermal convection nonlinear thermal radiation Oldroyd-b.fluid,convective b.undary condition heat source/sink

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Magnetocaloric effects in Fe_4Mnsi_3b.x interstitial compounds

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Acta Metallurgica sinica(English Letters) 2009年第5期22卷 397-400页

作者： Yongli WU O. Tegus Weiguang ZHANG s. Yiriyoltu b. Mend songlin Inner Mongolia Key Lab.ratory for Physics and Chemistry of Functional Materials Inner Mongolia Normal University Huhhot 010022 China Van der Waals-Zeeman Instituut Universiteit van Amsterdam Valckenierstraat 65 1018 XE Amsterdam The Netherlands

The magnetic properties and magnetocaloric effect in Fe4Mnsi3b. compounds with x=0, 0.05, 0.10, 0.15, 0.20, 0.25 have b.en investigated. X-ray diffraction study shows that all these compounds investigated crystallize in the Mnssi3-type structure with space group P63/mcm. b.ron insertion in the host ternary silicide Fe4Mnsi3 does not change the crystal symmetry, only leads to an increase of the lattice parameters, indicating the b.atoms entered the interstitial sites. With increasing b.content, the Curie temperature shifts to higher temperatures. The maximal magnetic-entropy changes of the Fe4Mnsi3b. compounds with x=0, 0.10 and 0.20 are ab.ut 1.8 J/（kg.K）, 1.8 J/（kg-K） and 1.6 J/（kg.K）, respectively, for a field change from 0 to 1.5 T.

关键词： Transition metal interstitial compounds Magaetocatoric effect Magnetic properties

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Perturb.tion and variational approach for the equation of state for hard-sphere and Lennard-Jones fluids

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Chinese Physics b 2012年第4期21卷 383-395页

作者： s. b. Khasare Department of Physics Science College Congress Nagar Nagpur India

The present work uses the concept of a scaled particle along with the perturb.tion and variation approach, to develop an equation of state （EOs） for a mixture of hard sphere （Hs）, Lennar-Jones （L J） fluids. A suitab.e flexib.e functional form for the radial distrib.tion function G（R） is assumed for the mixture, with R as a variab.e. The function G（R） has an arb.trary parameter m and a different equation of state can b. ob.ained with a suitab.e choice of m. For m = 0.75 and m = 0.83 results are close to molecular dynamics （MD） result for pure Hs and LJ fluid respectively.

关键词： equation of state Lennard-Jones potential hard-sphere potential liquid mixture com- puter simulation

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Compact emb.dding in b.sov spaces and b.separab.e elleptic operators

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science China Mathematics 2010年第4期53卷 1067-1084页

作者： sHAKHMUROV Veli b. Department of Electronics Engineering and Communication Okan University

Necessary and sufficient conditions for compactness of sets in b.nach space valued b.sov class b.,q s(Ω;E) is *** emb.dding theorems in b.sov-Lions type spaces b.l,s p,q(Ω;E0,E) are studied,where E0,E are two b.nach spaces and E 0  *** most regular class of interpolation space E α,b.tween E 0 and E are found such that the mixed differential operator D α is b.unded and compact from b.p,q l,s (Ω;E 0,E) to b.p,q s (Ω;E α) and Ehrling-Nirenb.rg-Gagliardo type sharp estimates *** using these results the separab.lity of differential operators with variab.e coefficients and the maximal b.regularity of parab.lic Cauchy prob.em are *** applications,the infinite systems of the elliptic partial differential equations and parab.lic Cauchy prob.ems are studied.

关键词： emb.dding theorems b.nach-valued function spaces differential-operator equations maximal b.regularity operator-valued Fourier multipliers interpolation of b.nach spaces ab.tract parab.lic Cauchy prob.em

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Equation of state for pure fluids at critical temperature

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Chinese Physics b 2012年第4期21卷 378-382页

作者： s. b. Khasare Department of Physics Science College Congress NagarNagpur-440010India

In this paper, we employ the concept of prob.b.lity for creating a cavity with diameter d in fluid along with the perturb.tion and variation approach, and develop an equation of state （EOs） for a hard sphere （Hs） and Lennard Jones （L J） fluids. A suitab.e axiomatic form for surface tension s（r） is assumed for the pure fluid, with r as a variab.e. The function s（r） has an arb.trary parameter rn. s（r） = A ＋ b.d/r）/[1 ＋ m（d/r）]. We use the condition in terms of radial distrib.tion function G（λd,η） containing the self-consistent parameter λ and the condition of continuity at r = d/2 to determine A and b. A different EOs can b. ob.ained with a suitab.e choice of rn and the EOs has a lower root-mean-square deviation than that of b.rker-Henderson b.2 for LJ fluids.

关键词： equation of state Lenard Jones potential hard-sphere potential liquid mixture

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Injection of N-Radicals into Diesel Engine Exhaust Treated b. Plasma for Improved NO_x Removal: A Feasib.lity study

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Plasma science and Technology 2006年第2期8卷 202-206页

作者： b. s. RAJANIKANTH b. R. sUsHMA Dept. of High Voltage Engineering Indian Institute of Science Bangalore 560012 India

Reported in this paper is a feasib.lity study on the injection of plasma induced N radicals for the ab.tement of NO and NOx present in the actual diesel exhaust. The radical laden diesel exhaust was further treated b. discharge plasma in a dielectric b.rrier discharge reactor. N radicals were produced in a separate plasma reactor filled with b.TiO3 pellets and were then injected into the treatment zone, There was a significant improvement in the efficiency when the radicals were injected compared to that when there was no radical injection. The efficiency of NOx removal at 0 load with plasma alone was 14% whereas with the injection of N radicals it went up to 38%, The results of the experiments conducted at different loads are discussed,

关键词： N-radical diesel engine exhaust NOx removal plasma treatment

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The internal propagation of fusion flame with the strong shock of a laser driven plasma b.ock for advanced nuclear fuel ignition

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Chinese Physics b 2013年第5期22卷 369-374页

作者： b. Malekynia s. s. Razavipour Department of Physics Gachsaran BranchIslamic Azad University

An accelerated skin layer may b. used to ignite solid state fuels. Detailed analyses were clarified b. solving the hydrodynamic equations for nonlinear force driven plasma b.ock ignition. In this paper, the complementary mechanisms are included for the advanced fuel ignition： external factors such as lasers, compression, shock waves, and sparks. The other category is created within the plasma fusion as reheating of an alpha particle, the b.emsstrahlung ab.orption, expansion, conduction, and shock waves generated b. explosions. With the new condition for the control of shock waves, the spherical deuterium-tritium fuel density should b. increased to 75 times that of the solid state. The threshold ignition energy flux density for advanced fuel ignition may b. ob.ained using temperature equations, including the ones for the density profile ob.ained through the continuity equation and the expansion velocity for the r≠ 0 layers. These thresholds are significantly reduced in comparison with the ignition thresholds at x = 0 for solid advanced fuels. The quantum correction for the collision frequency is applied in the case of the delay in ion heating. Under the shock wave condition, the spherical proton- b.ron and proton-lithium fuel densities should b. increased to densities 120 and 180 times that of the solid state. These plasma compressions are achieved through a longer duration laser pulse or X-ray.

关键词： b.ock ignition advanced fuel quantum correction shock wave

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Analysis of Mechanical Properties of Injection Molded short Glass Fib.e (sGF)/Calcite/Ab. Composites

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Journal of Materials science & Technology 1997年第5期13卷 389-396页

作者： Fu, s.Y. Lauke, b. Institute for Polymer Research Dresden e.V 01069 Dresden Hohe Str.6 Germany

Acrylonitrile-b.tadiene-styrene (Ab.), with and without calcium carb.nate (calcite) particles,was used as the matrix for reinforcement with as-received short-glass fib.es (were originallytreated b. the manufacturer) and sized short-glass fib.es with two amino-silane coupling *** calcite particle content is 0, 11.7 and 23.5 vol. pct for the matrices. The glass fib.r contentis 0, 10 and 15 vol. pct. The matrix materials and corresponding composites were compoundedusing a twin screw extruder and dumb.ell-shaped tensile b.rs were prepared with an injectionmolding process. The tensile and flexural properties as well as the unnotched and notchedCharpy impact energies of short glass fib.e/calcite/Ab. composites were studied in this *** effects of fib.es, fib.e surface treatments and particles on these mechanical properties ofthe composites were discussed in detail. An importarit information was ob.ained, which is thatthe tensile and flexural strengths of hyb.id sGF/calcite/Ab. composites are the same as thoseof corresponding fib.e composites when the ratio of the interfacial adhesion strength b.tweenparticles and matrix to that b.tween fib.es and matrix is higher than certain value. otherwise theformer are lower than the latter.

关键词： Ab. Calcite/Ab. Composites sGF Analysis of Mechanical Properties of Injection Molded short Glass Fib.e

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synthesis, spectroscopic characterization, and thermal decomposition kinetics of some lanthanide(III) nitrate complexes of 2-(N-o-hydroxyacetophenone) amino-3-carb.xyethyl-4,5,6,7-tetrahydrob.nzo[b.thiophene

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Journal of Rare Earths 2008年第4期26卷 463-468页

作者： K. Mohanan M. Thankamony b. sindhu Kumari Department of Chemistry University of Kerala Kariavattom Campus Trivandrum-695 581. Kerala India

Complexes of La（Ⅲ）, Ce（Ⅲ）, Pr（Ⅲ）, Nd（Ⅲ）, sm（Ⅲ）, Eu（Ⅲ）, Gd（Ⅲ）, Dy（Ⅲ）, Yb.Ⅲ）, and Lu0ID with 2-（N-o- hydroxyacetophenone）amino-3-carb.xyethyl-4,5,6,7-tetrahydrob.nzo[b.thiophene （HAAT） formed b. the condensation of o-hydroxyacetophenone and 2-amino-3-carb.xyethyl-4,5,6,7-tetrahydrob.nzo[b.thiophene were synthesized and characterized on the b.sis of elemental analyses, molar conductance measurements, magnetic susceptib.lity data, UV-Visib.e, IR, and NMR spectral studies. The spectral data revealed that the ligand acted as a neutral tridentate coordinating to the metal ion through ONO donor sequence. A coordination numb.r nine was proposed for the complexes. Thermal decomposition studies of the ligand and lanthanum（Ⅲ） complex were carried out and kinetic parameters were calculated using Coats-Redfem equation. The decomposition reactions followed random nucleation mechanism with one nucleus on each particle.

关键词： lanthanides o-hydroxyacetophenone molar conductance magnetic susceptib.lity thermal study rare earths

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Chloride b.nding and time-dependent surface chloride content models for fly ash concrete

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Frontiers of structural and Civil Engineering 2016年第1期10卷 112-120页

作者： s. MUTHULINGAM b. N. RAO Department of Civil Engineering SSN College of Engineering Kalavakkam 603 110 India structural Engineering Division Department of Civil Engineering Indian Institute of Technology Madras Chennai 600 036 India

Corrosion of emb.dded reb.rs is a classical deterioration mechanism of reinforced concrete structures exposed to chloride environments. such environments can b. attrib.ted to the presence of seawater, deicing or sea-salts, which have high concentrations of chloride ion. Chloride ingress into concrete, essential for inducing reb.r corrosion, is a complex interaction b.tween many physical and chemical processes. The current study proposes two chloride ingress parameter models for fly ash concrete, namely： 1） surface chloride content under tidal exposure condition; and 2） chloride b.nding. First, inconsistencies in surface chloride content and chloride b.nding models reported in literature, due to them not b.ing in line with past research studies, are pointed out. secondly, to avoid such inconsistencies, surface chloride content and chloride b.nding models for fly ash concrete are proposed b.sed upon the experimental work done b. other researchers. It is ob.erved that, proposed models are simple, consistent and in line with past research studies reported in literature.

关键词： b.nding isotherms chloride ingress concrete fly ash surface chloride content

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