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Brownian motion and thermophoresis effects on unsteady stagnation point flow of Eyring-powell nanofluid: a Galerkin approach

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communications in Theoretical Physics 2020年第12期72卷 71-82页

作者： Z H Khan m Usman T Zubair m Hamid R U Haq State Key Laboratory of Hydraulics and mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China BIc-ESAT College of EngineeringPeking UniversityBeijing 100871China State Key Laboratory for Turbulence and complex Systems Department of Mechanics and Engineering SciencePeking UniversityBeijing 100871China Institute of Ocean Research Peking UniversityBeijing 100871China School of mathematical Sciences Peking UniversityBeijing 100871China Department of mechanics and Engineering Science Fudan UniversityShanghai 200433China Department of Electrical Engineering Bahria UniversityIslamabad CampusIslamabad 44000Pakistan

This article concerns the analysis of an unsteady stagnation point flow of Eyring–powell nanofluid over a stretching *** influence of thermophoresis and Brownian motion is also considered in transport *** nonlinear ODE set is obtained from the governing nonlinear equations via suitable *** numerical experiments are performed using the Galerkin scheme.A tabular form comparison analysis of outcomes attained via the Galerkin approach and numerical scheme(RK-4)is available to show the credibility of the Galerkin *** numerical exploration is carried out for various governing parameters,namely,Brownian motion,steadiness,thermophoresis,stretching ratio,velocity slip,concentration slip,thermal slip,and fluid parameters,and Hartmann,Prandtl and Schmidt *** velocity of fluid enhances with an increase in fluid and magnetic parameters for the case of opposing,but the behavior is reversed for assisting *** Brownian motion and thermophoresis parameters cause an increase in temperature for both cases(assisting and opposing).The Brownian motion parameter provides a drop-in concentration while an increase is noticed for the thermophoresis *** the outcomes and the behavior of emerging parameters are illustrated *** comparison analysis and graphical plots endorse the appropriateness of the Galerkin *** is concluded that said method could be extended to other problems of a complex nature.

关键词： Eyring-powell fluid stagnation point flow Brownian motion and thermophoresis Galerkin method

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measurements of dihadron correlations relative to the event plane in Au+Au collisions at√^(S)NN=200 GeV

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chinese Physics c 2021年第4期45卷 198-241页

作者： H.Agakishiev m.m.Aggarwal Z.Ahammed A.V.Alakhverdyants I.Alekseev J.Alford B.D.Anderson c.D.Anson D.Arkhipkin G.S.Averichev J.Balewski D.R.Beavis N.K.Behera R.Bellwied m.J.Betancourt R.R.Betts A.Bhasin A.K.Bhat H.Bichsel J.Bieleik J.Bielcikova B.Biritz L.c.Bland W.Borowski J.Bouchet E.Braidot A.V.Brandin A.Bridgeman S.G.Brovko E.Bruna S.Bueltmann I.Bunzarov T.P.Burton X.Z.cai H.caines m.calderon de la Barca Sanchez D.cebra R.cendejas m.c.cervantes Z.chajecki P.chaloupka S.chattopadhyay H.F.chen J.H.chen J.Y.chen L.chen J.cheng m.cherney A.chikanian K.E.choi W.christie P.chung m.J.m.codrington R.corliss J.G.cramer H.J.crawford S.Dash A.Davila Leyva L.c.De Silvat R.R.Debbe T.G.Dedovich A.A.Derevschikov R.Derradi de Souza L.Didenko P.Djawotho S.m.Dogra X.Dong J.L.Drachenberg J.E.Draper J.c.Dunlop L.G Efimov m.Elnim J.Engelage G Eppley m.Estienne L.Eun O.Evdokimov R.Fatemi J.Fedorisin A.Feng R.G.Fersch P.Filip E.Finch V.Fine Y.Fisyak c.A.Gagliardi D.R.Gangadharan A.Geromitsos F.Geurts P.Ghosh Y.N.Gorbunov A.Gordon O.Grebenyuk D.Grosnick S.m.Guertin A.Gupta W.Guryn B.Haag O.Hajkova A.Hamed L-X.Han J.W.Harris J.P.Hays-Wehle m.Heinz S.Heppelmann A.Hirsch E.Hjort G.W.Hoffmann D.J.Hofiman B.Huang H.Z.Huang T.J.Humanic L.Huo G.Igo P.Jacobs W.W.Jacobs c.Jena F.Jin J.Joseph E.G.Judd S.Kabana K.Kang J.Kapitan K.Kauder H.Ke D.Keane A.Kechechyan D.Kettler D.P.Kikola J.Kiryluk A.Kisiel V.Kizka A.G.Knospe D.D.Koetke T.Kollegger J.Konzer I.Koralt L.Koroleva W.Korsch L.Kotchenda V.Kouchpil P.Kravtsov K.Krueger m.Krus L.Kumar P.Kurnadi m.A.c.Lamont J.m.Landgraf S.LaPointe J.Lauret A.Lebedev R.Lednicky J.H.Lee W.Leight m.J.LeVine c.Lil L.Li N.Li W.Li X.Li X.Li Y.Li Z.m.Li m.A.Lisa F.Liu H.Liu J.Liu T.Ljubicic W.J.Llope R.S.Longacre W.A.Love Y.Lu E.V.Lukashov X.Luo G.L.ma Y.G.mai D.P.mahapatra R.majka O.I.mall L.K.mangotra R.manweiler S.margetis c.markert H.masui H.S.matis Yu.A.matulenko D.meDonald T.S.mcShane A.meschanin R.milner N.G.minaev S.mioduszewski A.mischke m.K.mitrovski B.mohanty m.m.mondal B.morozov D.A.morozov m.G.munhoz m Argonne National Laboratory Argonnellinois 60439USA Brookhaven National Laboratory UptonNew York 11973USA University of califomia BerkeleyCaliformnia 94720USA University of california DavisCalifornia 95616USA University of califormnia Los AngelesCalifomia 90095USA Universidade Estadual de campinas Sao PauloBrazil University of Illinois at chicago ChicagoIlinois 60607USA creighton University OmahaNebraska 68178USA czech Technical University in Prague FNSPEPrague11519Czech Republic Nuclear Physics Institute AS cR 25068 Rez/PragueCzech Republic University of Frankfurt FrankfurtGermany Institute of Physics Bhubaneswar 751005India Indian Institute of Technology MumbaiIndia Indiana University BloomingtonIndiana 47408USA Alikhanov Instiute for Theoretical and Experimental Physics MoscowRussia University of Jammu Jammu 180001India Joint Institute for Nuclear Research Dubna141980Russia Kent State University KentOhio 44242USA University of Kentucky LexingtonKentucky40506-0055USA Institute of modern Physics LanzhouChina Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720USA massachusetts Institute of Technology CambridgeMA 02139-4307USA mx-Planck-Institut fir Physik MunichGermany michigan State University East LansingMichigan 48824USA moscow Engineering Physics Institute Moscow Russia NIKHEF and Utrecht University AmsterdamThe Netherlands Ohio State University ColumbusOhio 43210USA Old Dominion University NorfolkVA23529USA Panjab University Chandigarh 160014India PennsyIvania State University University ParkPennsylvania 16802USA Institute of High Energy Physics ProtvinoRussia Purdue University West LafayetteIndiana 47907USA Pusan National University PusanRepublic of Korea University of Rajasthan Jaipur 302004India Rice University HoustonTexas 77251USA Universidade de Sao Paulo Sao PauloBrazil University of Science&Technology of china Hefei 230026.China Shandong University JinanShandong 250100China Shanghai Institute of Applied Physics Shanghai 201800Chi

Dihadron azimuthal correlations containing a high transverse momentum(pr)trigger particle are sensit-ive to the properties of the nuclear medium created at RHIc through the strong interactions occurring between the traversing parton and the medium,*** measurements revealed a strong modification to di-hadron azimuthal correlations in Au+Au collisions with respect to ptp and d+Au *** modification in-creases with the collision centrality,suggesting a path-length or energy density dependence to the je-quenching *** paper reports STAR measurements of dihadron azimuthal correlations in mid-central(20%-60%)Au+Au collisions at√^(S)NN=200 GeV as a function of the trigger particle's azimuthal angle relative to the event plane,Ф_(s)=|Ф_(t)-ψ_(Ep)|.The azimuthal correlation is studied as a function of both the trigger and associated particle *** subtractions of the combinatorial background and anisotropic flow,assuming Zero Yield At minimum(ZYAm),are *** correlation results are first discussed with subtraction of the even harmonic(elliptic and quadrangu-lar)flow *** away-side correlation is strongly modifed,and the modification varies withФ_(s),with a double-peak structure for out-of-plane trigger *** near-side ridge(long range pseudo-rapidity△_(η)correla-tion)appears to drop with increasingФ_(s)while the jet-like component remains approximately *** correla-tion functions are further studied with the subtraction of odd harmonic triangular flow background arising from *** is found that the triangular flow,while responsible for the majority of the amplitudes,is not sufficient to explain theφs-dependence of the ridge or the away-side double-peak *** dropping ridge withФ_(s)could be attributed to aФ_(s)-dependent lliptie anisotropy;however,the physics mechanism of the ridge remains an open *** with aФ_(s)-dependent elliptic flow,the away-side correlation structure

关键词： relativistic heavy ion collisions dihadron correlations jet-medium interactions anisotropic flow background event plane

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东南极Bunger山的变质作用演化:元古造山事件中主变质期后伴随有限冷却的增压作用的证据

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世界地质 1991年第2期10卷 152-164页

作者： K.Stuwe R.powell 王天武

东南极的Bunger山在元古代期间经历了一次低压麻粒岩相造山事件。含石英的泥质片麻岩中,S_1叶理平行干m_1组合,石榴石-堇青石-尖晶石-铁铁矿和石榴石-矽线石-尖晶石-钛铁矿-金红石的稳定共存是m_1期间主期变质压力(大约为4Kb),温度(大约... 详细信息

东南极的Bunger山在元古代期间经历了一次低压麻粒岩相造山事件。含石英的泥质片麻岩中,S_1叶理平行干m_1组合,石榴石-堇青石-尖晶石-铁铁矿和石榴石-矽线石-尖晶石-钛铁矿-金红石的稳定共存是m_1期间主期变质压力(大约为4Kb),温度(大约在800℃)的证据。在m_2期间,石榴石反应边的生长和围绕铁尖晶石及铁钛氧化物的堇青石是增压期间m_1组合不稳定的证据。m_2组合的热动力学计算表明,其形成压力为6～7Kb,温度为750℃左右。因此,来自Bunger山的片麻岩表明了在有限的冷却期间,大约有2Kb或更多一些的增压作用。这样的P-T轨迹不同于具有等压冷却或减压特征的其它元古代地体。未变形的大的紫苏花岗岩体在增压作用的末期,在950℃左右的温度下向上侵入。由于变质作用是因为软流圈下的热扰动,在其上厚岩石圈中较薄大陆地壳的中等地壳深度上发生的,这就能较好地解释了m1期间的低压变质作用。我们提出冷却期间的增压作用,是相邻的正常厚度地壳和Bunger山薄地壳之间体积力的作用通过热扰动″接通″而发生重力回流的结果。在这样的模式内,出露于Bunger山的紫苏花岗岩侵入作用的时间与下地壳变质最大值期间部分熔融作用一致。

关键词： Bunger山麻粒岩相造山运动

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Effects of homogeneous-heterogeneous reactions in flow of powell-Eyring fluid

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Journal of central South University 2015年第8期22卷 3211-3216页

作者： T.Hayat m.Imtiaz A.Alsaedi Department of mathematics Quaid-I-Azam University NAAm Research Group Department of Mathematics Faculty of ScienceKing Abdulaziz University

The steady two-dimensional flow of powell-Eyring fluid is investigated. The flow is caused by a stretching surface with homogeneous-heterogeneous reactions. The governing nonlinear differential equations are reduced to the ordinary differential equations by similarity transformations. The analytic solutions are presented in series forms by homotopy analysis method(HAm). convergence of the obtained series solutions is explicitly discussed. The physical significance of different parameters on the velocity and concentration profiles is discussed through graphical illustrations. It is noticed that the boundary layer thickness increases by increasing the powell-Eyring fluid material parameter(ε) whereas it decreases by increasing the fluid material parameter(δ). Further, the concentration profile increases when powell-Eyring fluid material parameters increase. The concentration is also an increasing function of Schmidt number and decreasing function of strength of homogeneous reaction. Also mass transfer rate increases for larger rate of heterogeneous reaction.

关键词： powell-Eyring fluid boundary layer flow stretching sheet homogeneous-heterogeneous reactions

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Pressure Ulcer Prevention: Effectiveness of Heel Off-Loading methodologies

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Open Journal of Nursing 2015年第10期5卷 909-916页

作者： christopher c. Griffin Tammy Dean Jonathan m. cayce mary Anne modrcin DeRoyal Industries Powell TN USA caylor School of Nursing Lincoln Memorial University Harrogate TN USA

Skin integrity breakdown and pressure ulcer formation on the heel are predictable and preventable healthcare occurrences. By minimizing surface contact pressures that can cause heel capillary occlusion, heel off-loading devices help mitigate the risk of decubitus ulceration. The purpose of this study is to investigate the efficacy of six off-loading methods commonly used in clinical settings to decrease heel contact pressure. Pressure mapping is used to evaluate contact pressure at the heel for underweight, normal weight, and overweight simulations. Based upon averages across four trials, it is shown that all devices reduce heel contact pressure when compared to no off-load- ing. The PRUventor™ boot exhibits significantly lower average pressure values than other off-load- ing strategies tested, suggesting that the PRUventor™ is the most effective off-loading device. From the analysis of the experimental data and comparison to similar data for respective off-loading alternatives, it is concluded that the PRUventor™ boot is an effective heel off-loading device for use in clinical settings.

关键词： Heel Pressure Ulcer Pressure Ulcer Off-Loading Devices Pruventor™ Pressure mapping

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西印度构造演化及其对烃类显示意义综述

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海洋地质 2009年第4期25卷 43-51页

作者： Andrew m. Gombos William G. powell Ian O. Norton 万玲（译）万荣胜（校）美国Exxon生产研究公司不详

印度最大的油气聚集区位于西印度，具有独特的构造事件集中发生。中生代沿元古代活动带构造方向的裂谷作用形成了印度海岸的被动边缘盆地。campanian期（83．5—70．6ma），马达加斯加与印度发生分离，南北向正断层传播进入到cambay Gra... 详细信息

印度最大的油气聚集区位于西印度，具有独特的构造事件集中发生。中生代沿元古代活动带构造方向的裂谷作用形成了印度海岸的被动边缘盆地。campanian期（83．5—70．6ma），马达加斯加与印度发生分离，南北向正断层传播进入到cambay Graben地区。在初始德干Reunion热点之上，晚maastrichtian（70．6—65．5ma）隆起在西北印度海岸产生了伸展应力场，形成盂买高断块。早古新世，德干溢流玄武岩喷发后，伸展在薄弱的地壳中继续，引起了孟买地堑和Surat坳陷沉降的加强、Seychelles微大陆从印度分离以及孟买高地上正断层的重新活动。孟买地堑和Surat（Danahu）坳陷在热沉降期间充填了富有机质页岩，在缓慢沉降的盂买台地上发育了始新-中新世浅水碳酸盐，海平面波动产生了次生孔隙的发育。晚第三纪成熟的Surat（Danahu）坳陷页岩生成烃类，运移至孟买高的碳酸盐储层。canlpanian构造事件之后，Konkan—kerala和印度东海岸的较老盆地并未受到影响，缺乏有利的成藏要素是该地区的特点。

关键词：构造演化西印度烃类碳酸盐储层综述显示边缘盆地马达加斯加

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Deterministic and Stochastic Fractional-Order Hastings-powell Food chain model

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computers, materials & continua 2022年第2期70卷 2277-2296页

作者： moustafa El-Shahed Asmaa m.Al-Dububan Department of mathematics Unaizah College of Sciences and ArtsQassim UniversityUnaizah51911Saudi Arabia Department of mathematics Buraydah College of Sciences and ArtsQassim UniversityBuraydah51431Saudi Arabia

In this paper,a deterministic and stochastic fractional-order model of the tri-trophic food chain model incorporating harvesting is proposed and *** interaction between prey,middle predator and top predator population is *** order to clarify the characteristics of the proposed model,the analysis of existence,uniqueness,non-negativity and boundedness of the solutions of the proposed model are *** sufficient conditions that ensure the local and global stability of equilibrium points are *** using stability analysis of the fractional-order system,it is proved that if the basic reproduction number R_(0)m point E_(1) is globally asymptotically *** occurrence of local bifurcation near the equilibrium points is investigated with the help of Sotomayor’s *** numerical examples are given to illustrate the theoretical *** impact of harvesting on prey and themiddle predator is *** conclude that harvesting parameters can control the dynamics of the middle predator.A numerical approximation method is developed for the proposed stochastic fractional-order model.

关键词： Food chain model global dynamics stability stochastic Hastings-powell model harvesting

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mHD effect of mixed convection boundary-layer flow of powell-Eyring fluid past nonlinear stretching surface

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Applied mathematics and mechanics(English Edition) 2014年第12期35卷 1525-1540页

作者： S.PANIGRAHI m.REZA A.K.mISHRA Department of mathematics National Institute of Science & TechnologyBerhampur 761008 India Department of mathematics Berhampur UniversityBerhampur 760007 India

Sufficient conditions are found for the existence of similar solutions of the mixed convection flow of a powell-Eyring fluid over a nonlinear stretching permeable sur- face in the presence of magnetic field. To achieve this, one parameter linear group trans- formation is applied. The governing momentum and energy equations are transformed to nonlinear ordinary differential equations by use of a similarity transformation. These equations are solved by the homotopy analysis method （HAm） to obtain the approximate solutions. The effects of magnetic field, suction, and buoyancy on the powell-Eyring fluid flow with heat transfer inside the boundary layer are analyzed. The effects of the non- Newtonian fluid （powell-Eyring model） parameters ε and δon the skin friction and local heat transfer coefficients for the cases of aiding and opposite flows are investigated and discussed. It is observed that the momentum boundary layer thickness increases and the thermal boundary layer thickness decreases with the increase in ε whereas the momentum boundary layer thickness decreases and thermal boundary layer thickness increases with the increase in δ for both the aiding and opposing mixed convection flows.

关键词： stretching surface non-Newtonian fluid mixed convection

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Numerical Analysis of the mixed Flow of a Non-Newtonian Fluid over a Stretching Sheet with Thermal Radiation

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Fluid Dynamics & materials Processing 2023年第2期19卷 407-419页

作者： Nourhan I.Ghoneim Ahmed m.megahed maritime Department-marine Engineering International Maritime College Oman(IMCO)Suhar322Sultanate of Oman Department of mathematics Faculty of ScienceBenha UniversityBenha13518Egypt

A mathematical model is elaborated for the laminar flow of an Eyring-powell fluid over a stretching *** considered non-Newtonian fluid has Prandtl number larger than *** effects of variable fluid properties and heat generation/absorption are also *** balance equations for fluid flow are reduced to a set of ordinary differential equations through a similarity transformation and solved numerically using a chebyshev spectral *** effect of various parameters on the rate of heat transfer in the thermal boundary regime is investigated,i.e.,thermal conductivity,the heat generation/absorption ratio and the mixed convection *** agreement appears to exist between theoretical predictions and the existing published results.

关键词： Porous medium Eyring-powell fluid chebyshev spectral method mixed convection thermal stratification

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神经功能恢复良好的动脉瘤性蛛网膜下腔出血患者18个月后的心理状况调查

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世界核心医学期刊文摘（神经病学分册） 2005年第1期1卷 17-18页

作者： powell J. Kitchen N. Heslin J. Greenwood R. 李锐 Goldsm iths college Lewisham WayNewCrossLondonSE146N W United K ing-dom Dr.

Objectives: To evaluate functioning, 18 m onths after surgery,of 49patients with good neurological recovery following aneurysm alsubarachnoid haem orrhage (SAH ), and to determ ine the extent of any im provem ents in dis- turbances of m ood,cognitive functioning,and levels of activity and participation previously observed at 9m onth follow up.m ethods: SAH patients, m atched for age, gender,and occupation with healthy control participants, com pletely quantitative m easures ofm ood (H A D S,FIES, BD I)and activity /participation (BIcR O -39scales),and a briefcognitive assessmentbattery (verbalfluency,digit span,prose recall).controls com pleted theH A D S and the BIcRO -***:Patients showed som e recovery of cognitive functioning,though im pairm ents of prose recall persisted.A nxiety and depression sym ptom s were higher in patients than in controls,butfewerthan 20% scored in the clinical range on any questionnaires except for RIES-Intrusive thoughts (22%);only three showed signs of full blown post-traum atic stress *** ost half showed elevated dependence on others for dom estic activi- ties and organisation and abnorm ally low levels ofem ploy- *** little variance in outcom e was predicted by dem ographic variables,neurological or cognitive im pair- m ent,prior life stress,orm ood.H owever,levels ofsocial activity and self-organisation were related to persisting fa- tigue. conclusions: The observed decline in intrusive thoughts and avoidance over tim e is consistent with that seen after life threatening illness or traum *** persistent reductions in independence and levels of em ploym ent m ay in som e casesreflectconsidered lifestyle adjustm ents rather than adverse and unwanted changes butin others indicate a need forfocused rehabilitation.

关键词：心理状况调查功能恢复认知功能康复治疗情绪障碍认知损害记忆障碍流畅性职业与健康应激状态

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