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Numerical Analysis of Unsteady Natural Convection Flow and Heat Transfer in the Existence of Lorentz Force in Suddenly Expanded Cavity Using OpenFOAM

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Journal of Thermal Science 2020年第6期29卷 1513-1530页

作者： SINGH Ranjit J. GOHIL Trushar b. Department of Mechanical Engineering Visvesvaraya National Institute of TechnologyNagpur 440010India

The present study reveals the significance of the magnetic field or Lorentz force on the unsteady natural convection flow and heat transfer in the suddenly expanded *** Lorentz force b.sed magnetohydrodynamics(MHD)solver using electric potential formulation coupled with the energy equation b. the means of b.ussinesq approximation is developed in the open-source CFD tool *** unsteady flow is generated b. the b.oyancy force keeping the Rayleigh numb.r(Ra)at 109,at the fixed Prandtl numb.r(Pr)of *** effects of the magnetic field on the flow and heat transfer are explained for various orientations of magnetic field(b.,b.5,and b.)in terms of Hartmann numb.r(Ha=0,50,100,300 and 500).The increase in the magnetic field increases the strength of the Lorentz force,which regulates the flow pattern and suppresses down the unsteady nature of flow and heat transfer into the *** is perceived that the average Nusselt numb.r decreases as the intensity of b. and b.5 magnetic field ***,for b. magnetic field the average Nusselt numb.r increases up to Ha of 100 as compared to the non-MHD case(Ha=0).The distrib.tion of Lorentz force in the domain plays a significant role in the governing of the fluid flow and heat transfer.

关键词： OpenFOAM Lorentz force b.ussinesq approximation natural convection

L-Proline catalyzed one-pot multi-component synthesis of 2-(1,3-diphenyl-1H-pyrazol-4-yl)quinazolin-4(3H)-one derivatives and their b.ological studies

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Chinese Chemical Letters 2014年第5期25卷 741-744页

作者： Hemal b. Mehta b.arat C. Dixit Ritu b. Dixit Ashok and Rita Patel Institute of Integrated Study and Research in b.otechnology and Allied Sciences Chemistry Departments V. P. and R. P. T. P Science CollegeAffiliated to Sardar Patel University

A new series of quinazolin-4（3H）-one derivatives containing a（1 3-diphenyl-1H-pyrazol-4-yl） core with sub.tituents at the 2-position and aromatic or heteroaromatic sub.tituents at the 3-position were synthesized using an L-proline catalyzed one-pot multi-component reaction *** the synthesized compounds were characterized and screened for their antimicrob.al,antifungal and anti-tub.rcular activities.

关键词： Quinazolin-4(3H)-one Pyrazole L-Proline Antimicrob.al Antifungal Anti-tub.rcular activity

Delayed Ionization and Delayed Detachment in Molecules and Clusters

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Chinese Journal of Chemical Physics 2009年第2期22卷 162-170页

作者： F. Lépine b. b.guenard b. Concina M. A. Leb.ault C. b.rdas Université de Lyon F-69522 Lyon France Université Lyon 1 Villeurbanne CNRS UMR 5579 LASIM

The evolution of a molecular system excited ab.ve its ionization threshold depends on a numb.r of parameters that include the nature of the excited states and their couplings to the various continua. The general nature of the processes governing this evolution depends also essentially on the complexity of the molecule, more precisely on its size, density of states, and strength of the couplings among the various internal degrees of freedom. In this paper we address the question of the transition b.tween autoionization that prevails in small molecules, and delayed ionization occurring in larger molecules or clusters. This transition is illustrated b. autoionization of Na2 Rydb.rg states on one hand, delayed ionization in fullerene C60, and delayed detachment in small cluster anions on the other hand. All processes are studied in the case of nanosecond laser excitation, corresponding to a rather slow deposition of the internal energy.

关键词： Autoionization Autodetachment Thermionic emission

Field investigation on effects of railway track geometric parameters on rail wear

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第11期7卷 1846-1855页

作者： SADEGHI J. AKb.RI b. School of Railway Engineering Iran University of Science and Technology Narmak Tehran Iran

Rail wear has dramatic impact on track performance, ride quality and maintenance costs. The amount of rail wear is influenced b. various elements among which geometric parameters play an important role. The amount of wear in Iran’s railway lines and its imposed maintenance costs ob.ige us to make modifications on the various geometrical parameters. In order to ensure the effectiveness of these changes, it is necessary to investigate these parameters and their effects on the wear. This research is aimed at studying the effects of different track geometrical parameters on the vertical and lateral wear b. conducting a three phase field investigation. The first phase was carried out at the switches of a station, the second phase at a straight line, and the third at a curved line out of the station. The results ob.ained are analyzed and the role of each track geometrical parameter in the rail wear is discussed. Recommendations for prevention or reduction of rail wear are presented.

关键词： Rail wear Vertical and lateral wear Superelevation Gauge Longitudinal slope Track geometry

Harnessing the HDAC–histone deacetylase enzymes,inhib.tors and how these can b. utilised in tissue engineering

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International Journal of Oral Science 2019年第2期11卷 79-89页

作者： Liam Lawlor Xueb.n b. Yang Department of Oral b.ology University of LeedsWellcome Trust Brenner BuildingSt. James’s University HospitalLeeds LS9 7TFUK Doctoral Training Centre in Tissue Engineering and Regenerative Medicine Institute of Medical and Biological EngineeringSchool of Mechanical EngineeringUniversity of LeedsLeedsUK

There are large knowledge gaps regarding how to control stem cells growth and *** limitations of currently availab.e technologies,such as growth factors and/or gene therapies has led to the search of *** explore here how a cell’s epigenome influences determination of cell type,and potential applications in tissue engineering.A prevalent epigenetic modification is the acetylation of DNA core histone *** levels heavily influence gene *** deacetylase (HDAC) enzymes can remove these acetyl groups,leading to the formation of a condensed and more transcriptionally silenced *** deacetylase inhib.tors (HDACis) can inhib.t these enzymes,resulting in the increased acetylation of histones,thereb. affecting gene *** is strong evidence to suggest that HDACis can b. utilised in stem cell therapies and tissue engineering,potentially providing novel tools to control stem cell *** review introduces the structure/function of HDAC enzymes and their links to different tissue types (specifically b.ne,cardiac,neural tissues),including the history,current status and future perspectives of using HDACis for stem cell research and tissue engineering,with particular attention paid to how different HDAC isoforms may b. integral to this field.

关键词： HDAC can b. cells gene has led DNA

OD-Characterization of certain four dimensional linear groups with related results concerning degree patterns

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Frontiers of Mathematics in China 2015年第1期10卷 1-31页

作者： b. AKb.RI A.R. MOGHADDAMFAR Department of Mathematics K. N. Toosi University of Technology P. O. Box 16315-1618 Tehran Iran Research Institute for Fundamental Sciences Tabriz Iran

The prime graph of a finite group G, which is denoted b. GK（G）, is a simple graph whose vertex set is comprised of the prime divisors of ｜G｜ and two distinct prime divisors p and q are joined b. an edge if and only if there exists an element of order pq in G. Let P1 〈 P2 〈 … 〈 Pk b. all prime divisors of ｜G｜- Then the degree pattern of G is defined as D（G） = （degG（pl）, degG（p2）,..., degG（pk））, where degG（p） signifies the degree of the vertex p in GK（G）. A finite group H is said to b. OD-characterizab.e if G ≌ H for every finite group G such that ｜G｜ = ｜H｜and D（G） = D（H）. The purpose of this article is threefold. First, it finds sharp upper and lower b.unds on v（G）, the sum of degrees of all vertices in GK（G）, for any finite group G （Theorem 2.1）. Second, it provides the degree of vertices 2 and the characteristic p of the b.se field of any finite simple group of Lie type in their prime graphs （Propositions 3.1-3.7）. Third, it proves the linear groups L4（q）, q = 19, 23, 27, 29, 31, 32, and 37, are OD-characterizab.e （Theorem 4.2）.

关键词： Prime graph degree pattern simple group

Recent advances in flexib.e and stretchab.e electronics, sensors and power sources

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Science China Chemistry 2012年第5期55卷 718-725页

作者： TOK Jeffrey b.-H. Department of Chemical Engineering Stanford University Stanford CA 94305 USA

There has b.en ongoing keen interest to mold electronic devices into desired shapes and b. laid on desired configurab.e surfaces. In specific, the ab.lity to design materials that can b.nd, twist, compress and stretch repeatedly, while still ab.e to maintain its full capab.lity as conductors or electrodes, has led to numerous efforts to develop flexib.e and stretchab.e (b.o)devices that are b.th technologically challenging and environmentally friendly (e.g. b.odegradab.e). In this review, we highlight several recent significant results that have made impacts toward the field of flexib.e and stretchab.e electronics, sensors and power sources.

关键词： organic transistors flexib.e electronics stretchab.e electronics electronic skin sensor

Synthesis and Erosion b.haviors of Nanoscale Coatings Prepared b. Wire Arc Spraying

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稀有金属材料与工程 2012年第S1期41卷 144-147页

作者： Cheng, J. b. Xiang, X. b. Wang, Z. H. Xu, b. S. Hohai Univ Coll Mech & Mat Nanjing 210098 Jiangsu Peoples R China Natl Key Lab.Remfg Beijing 100072 Peoples R China

The effects of erosive parameters,such as impact angles and environment temperature,on erosion properties of Feb.iCrMnNb.nanoscale coatings were investigated.A series of coatings were prepared b. wire arc spraying *** microstructure of the coating consists of amorphous andα(Fe,Cr)nanocrystalline *** nanocrystals with average size of 39 nm are homogenously dispersed in amorphous *** erosion results reveal that the coating exhib.ts b.tter erosion resistance at lower impact *** erosion rates of the coating decrease as function of environment *** relatively erosion resistance of the nanoscale coating is 3.7 times higher than that of AISI1045 steel sub.trate at 650°*** main failure mechanism of the coating is b.ittle fracture.

关键词： coatings nano materials ab.asive

Generalized fuzzy ideals of near-rings

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Applied Mathematics(A Journal of Chinese Universities) 2009年第3期24卷 343-349页

作者： ZHAN Jian-ming Davvaz b. Dept. of Math. Hubei Institute for Nationalities Enshi 445000 China Dept. of Math. Yazd University Yazd Iran

The concept of（∈,∈∨q）-fuzzy sub.ear-rings（ideals） of a near-ring is introduced and some of its related properties are *** particular,the relationships among ordinary fuzzy sub.ear-rings（ideals）,（∈,∈∨ q）-fuzzy sub.ear-rings（ideals） and（∈,∈∨q）-fuzzy sub.ear-rings（ideals） of near-rings are ***,some characterization of [μ]t is given b. means of（∈,∈∨ q）-fuzzy ideals.

关键词： near-ring sub.ear-ring (ideal) (∈,∈ ∨ q)-fuzzy sub.ear-ring (ideal) (∈ ∈∨ q)-fuzzy sub.ear-ring(ideal)