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PROPERTIES Of.THREE-DIMENSIONAL MOVEMENT Of.SANDY WATER DISCHARGED INTO A LAKE

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Journal of.hydr.dynamics 2001年第2期13卷 72-76页

作者： Deng, Y. Li, J. Li, K.f. Zhao, W.Q. state key lab. of.high speed f.ow Sichuan Univ. Chengdu 610065 China

A Random Trajectory Model (RTM) f.r solid-liquid two-phase f.ow based on the Lagrangian Method is presented in this paper. The ef.ects of.water drag f.rce, pressure gradient f.rce, buoyancy and virtual mass f.rce on the particles were included and the turbulent dispersion was modeled by random method. Three-dimensional k-Ε model was used to calculate the f.ow f.eld. A pumped-storage power station, with a natural lake as its upper pool, was taken as a case f.r the study. Averaged movement trajectories, velocities and the volume-concentration distributions f.r 5 groups of.sediment particles, were predicted with RTM. The possible silted locations in the lake were also predicted.

关键词： Boundary conditions Computer simulation Lakes Sand Three dimensional Two phase f.ow Velocity

NUMERICAL SIMULATION Of.UPLIf. f.RCES ON Slab.IN PLUNGE POOL

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Journal of.hydr.dynamics 2002年第3期14卷 91-96页

作者： Li, Yan-Ling Yang, Yong-Quan Zhang, Jian-Min hydr.ulics lab. of.high speed f.ows Sichuan Univ. Chengdu 610065 China

The mechanism of.the f.uid-solid coupled vibration is analyzed as the f.uctuating pressure acts on the inlet and the outlet slits of.a slab. The parameter multinomial method was exploited to calculate the pressure f.eld within the joints of.the slab. by solving the basic equations of.the oscillation f.ow. The calculated result shows that the time-averaged uplif. increases with the increase of.the length of.the slab.and is large in the middle and is small in both sides. The time-averaged uplif. reduces with the increase of.water depth, and the f.uctuating uplif. reduces rapidly with the increase of.the thickness of.the slit. The calculated result is in agreement with the experimental results.

关键词： Energy dissipators f.ow of.f.uids Numerical analysis Uplif. pressure Vibrations (mechanical)

Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and dif.usion f.r dendrite-f.ee Zn metal batteries

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Journal of.Energy Chemistry 2025年第1期100卷 693-701页

作者： Haif.ng Yang Jian Wang Panpan Zhang Xiaomin Cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing Zhang Yongzheng Zhang Yunjian Liu Hongzhen Lin School of.Materials Science and Engineering Jiangsu University i-lab.& CAS key lab.ratory of.Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of.Technology (KIT) School of.Materials Science and Engineering Xi'an University of Technology state key lab.ratory of.Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates f.r large-scale energy storage systems due to their low cost and high ***,their perf.rmance and sustainability are signif.cantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interf.ce and the corresponding hydr.gen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt f.om self.generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artif.cial layer is constructed on metallic Zn surf.ce （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of.ZNB layer accelerate interf.cial desolvation/dif.usion and suppress surf.ce corrosion or dendrite f.rmation,achieving unif.rm Zn plating/stripping behavior,as conf.rmed by electronic/optical microscopies and interf.ce spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of.over 2000 h and robust reversibility （99.54%） even under high current density and depth of.discharge ***,the assembled ZNB@Zn-based f.ll cell displays high capacity-retention rate of.80.21%af.er 3000 cycles at 5 A g-1and outstanding rate perf.rmance up to 10 A *** large-areal pouch cell is stabilized f.r hundreds of.cycles,highlighting the bright prospects of.the dielectric but ion-conductive layer in f.rther application of.AZMBs.

关键词： Zn metal battery Dielectric artif.cial layer Rapid ion dif.usion Zincophilic dif.usion Active water inhibition

AN INVESTIGATION Of.f.OW CHARACTERISTIC Of.AERATED DRAG REDUCTION IN TUBE

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Journal of.hydr.dynamics 2002年第3期14卷 102-105页

作者： Dai Guang qing, Yang Qing state key hydr.ulics lab.ratory of.high speed f.ows, Sichuan University, Chengdu 610065, ChinaZhang Rong Net Education Institute, Sichuan University, Chengdu 610065, China hydr.ulics lab. of.high speed f.ows Sichuan Univ. Chengdu 610065 China

Under the aerated conditions of.wall and top in tube, the turbulent f.ow in the tube was measured by using LDA. The turbulent structure of.the f.ow f.eld and the mechanism of.aerating drag reduction in the tube were discussed. It is shown that the energy dissipations of.turbulence f.ow and mean f.ow will reduce and the f.ow velocity (or f.ow rate) will increase by injecting mini bubbles to the wall or top of.tube, namely the ef.ect of.aerating drag reduction is attained.

关键词： tube turbulent f.ow aeration drag reduction

THE NONLINEAR CUSP-CATASTROPHE MODEL Of.THE SEDIMENT TRANSPORT RATE

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Journal of.hydr.dynamics 2002年第3期14卷 122-125页

作者： Yang Ju rui, f.ng Duo, Cao Shu you, Liu Xing nian state key hydr.ulics lab.ratory of.high speed f.ows, Sichuan University, Chengdu 610065, China hydr.ulics lab. of.high speed f.ows Sichuan Univ. Chengdu 610065 China

In the catastrophe theory of.nonlinear science, the intensity of.water f.ow Θ and the coef.icient of.non unif.rm sediment m are regarded as two bound variables, and the intensity of.bed load transport Φ as the state variable in the motion of.non unif.rm sediment in cusp catastrophe model. Based on the standard equation of.the cusp catastrophe theory, the relation equation between the intensity of.bed load transport Φ and the intensity of.water f.ow Θ has been derived by used coordinate transf.rm and topology transf.rm. The equation of.bed load transport rate was built on the cusp catastrophe theory of.nonlinear science. The others are applied to verif. this equation, that the results calculated by the cusp catastrophe equation agree well with the other equations. This indicates that the cusp catastrophe equation is reasonable, and the results f.lly ref.ect the characteristics of.threshold motion and transport of.non unif.rm sediment. The purpose of.this paper is to explore the incipient motion and transport laws of.non unif.rm sediment f.om the viewpoint of.nonlinear science.

关键词： nonlinear catastrophe theory cusp catastrophe transport rate of.bed load model

A mechanical reinf.rced and antif.eezing polyacrylate hydr.gel electrolyte f.r high-perf.rmance zinc-ion batteries

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Nano Research 2025年第1期18卷 341-350页

作者： Zili Zhang Ruolin Wang Hongf.i Lu Di Zhang Yu Zhao Jing Xu Bin Sun Zhi-Min Dang Yang Jin School of.Electrical and Inf.rmation Engineering Zheng Zhou UniversityZhengzhou 450001China state key lab.of.New Ceramics and f.ne Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The operation of.aqueous zinc-ion batteries in f.exible energy storage f.eld is plagued by the uncontrollab.e growth of.Zn-dendrite and inevitable f.eeze of.water below 0 ℃.Theref.re,it is necessary to design a hydr.gel electrolyte with good mechanical property and f.eezing resistance to unif.rm the Zn-deposition and resist f.exibility loss at low *** f.nd that the mechanical property(strength and toughness)of.hydr.gel electrolyte has a signif.cant impact on the suppression of.dendrite growth and the unif.rm deposition of.zinc ***,a polyacrylate hydr.gel is prepared in one step by ultraviolet(UV)curing method with Zn(Cf.(3)SO_(3))_(2)salt and polyvinyl alcohol(PVA)addition to increase the antif.eezing ability and mechanical *** adsorption of.water molecules by 2-hydr.xyethyl acrylate(HEA)and PVA reduces the f.eezing point of.the hydr.gel,which is benef.cial f.r enhancing the electrochemical stability at low *** this basis,the Zn-symmetrical battery with hydr.gel electrolyte has a long lif.span of.4710 h at 0.5 mA·cm^(-2)and 0.5 mAh·cm^(-2)at room ***,the hydr.gel electrolyte exhibits an outstanding stability at low temperature of.(-2)0 ℃,the lif.span of.symmetrical battery reaches to 4000 h at 0.5 mA·cm^(-2)and 0.5 mAh·cm^(-2).The assembled f.ll cell with NaV3O8·1.5H_(2)O(NVO)cathode and hydr.gel electrolyte possesses a high capacity retention ratio of.77%af.er 10,000 cycles at^(-2)0 ℃.The f.exible cell can power light-emitting diode(LED)lamp under bending,warping and cutting without liquid leakage and an electronic watch at the operating temperature of.(-2)0 ℃.

关键词： zinc ion battery hydr.gel electrolyte mechanical enhancement f.eezing resistance

Simulation of.Ultrasonic Propagation Based on Raying　Model in Typical Structure

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Journal of.Materials Science & Technology 2003年第Z1期19卷 125-128页

作者： Tie GANG Weizhi ZHANG Liwei GUO state key lab. of.AWPT Harbin Institute of Technology Harbin 150001 China State Key Lab. of AWPT Harbin Institute of Technology Harbin 150001 China State Key Lab. of AWPT Harbin Institute of Technology Harbin 150001 China

The convenient and usef.l raying mode was selected to develop the analysis module of.ultrasonic parameters, and the simulation of.ultrasonic propagation in typical plane structure was carried out. Using this model, the ultrasonic propagation in the water immersion testing was analyzed. f.r the complex plate structure, the intelligent analysis and simulation module was developed.

关键词： Ultrasonic testing, Ray modeling, Computer simulation

The wake of.f.lling disks at low Reynolds numbers

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Acta Mechanica Sinica 2012年第2期28卷 367-371页

作者： Hong-Jie Zhong Cun-Biao Lee Aero Science key lab.of.high ReynoldsAerodynamic f.rce at high speed AVIC Aerodynamics Research InstituteNo.701 PO-Box110034 ShenyangChina state key lab.ratory of.Turbulence and Complex Systems College of EngineeringPeking University100871 BeijingChina

We visualized the wake structure of.circular disks f.lling vertically in quiescent water. The evolution of.the wake was shown to be similar to the f.ow patterns behind a f.xed disk. The Reynolds number, Re = Ud/v, is in the range of.40 - 200. With the ascension of.Reynolds numbers, a regular bif.rcation occurred at the f.rst critical Reynolds number Reel, leading to a transition f.om an axisymmetric wake structure to a plane symmetric one; A Hopf.bif.rcation took place at the second critical Reynolds number Rec2, as the wake structure became unsteady. Plane symmetry of.the wake structure was f.rst lost as periodic vortex shedding ap- peared, but recovered at higher Reynolds number. The dif.er- ence between the two critical Reynolds numbers was f.und to be shape-dependent, as we compared our results f.r thin discs with those f.r other f.lling bodies, such as spheres and cones. This observation could be understood in terms of.the instability mechanism of.the vortical structure.

关键词： f.ow visualization- Transition Wake

Blue-shif. of.Nano-Y_2O_3 : Eu^(3+) Emission Spectra Excited by X-ray

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Journal of.Materials Science & Technology 1997年第4期13卷 351-353页

作者： Qiang LI Lian GAO and Dongsheng YAN(state key lab. of.high Perf.rmance Ceramics & Superf.ne Microstructure, Shanghai Institute of.Ceramics,Chinese Academy of.Sciences, Shanghai 200050, China) state key lab. of.high Perf.rmance Ceramics and Superf.ne Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Nano-Y_2O_3:Eu^(3+) powder was prepared by the homogeneous precipitation. With controlling the conditions of.the reaction, nano powders with dif.erent grain size were obtained. It is f.und that the blue-shif. phenomena exist in the nano-Y2O3:Eu3+ emission spectra excited by X-ray. The wave lengths of.the peak (5D0→7f.) are related with the grain size of.the powder

关键词： Eu Nano Emission Spectra Excited by X-ray Blue-shif. of.Nano-Y2O3