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Settling behavior of spherical particles in eccentric annulus filled with viscous inelastic fluid

Petroleum Science 2022年第4期19卷 1653-1663页

作者： Zhao-Peng Zhu xian-Zhi song Ergun Kuru Hong-Bo Chen Bu-wen Yu Zi-Chao Lin Yan-Xin Sun China University of Petroleum-Beijing Beijing102249China University of Alberta Edmonton10230Canada State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum-BeijingBeijing102249China

Hole cleaning is a complex process as there are many variables affecting cuttings removal(*** fluid type,density,flow rate and rheological properties,cuttings size,drill pipe rotation speed).With the increasing number of drilling small diameter wells(*** tubing drilling applications,ultra-deep wells drilled for exploitations of unconventional oil and gas resources),the wall resistance of the micro annulus also emerges as one of the most critical factors affecting the cuttings accumulation in *** eccentricity of drill pipes commonly observed during the drilling process of ultra-deep well and coiled tubing well makes the wall resistance effect on the cuttings transport even more *** the wall resistance effect on the particle settling behavior in eccentric annuli is,therefore,crucial for hydraulic design of efficient cuttings transport operations in these *** this study,a total of 196 sets of particle settling experiments were carried out to investigate the particle settling behavior in eccentric annuli filled with power-law *** test matrix included the eccentricity ranges of 0-0.80,the dimensionless diameter ranges of 0.13-0.75 and the particle Reynolds number ranges of 0.09-32.34.A high-speed camera was used to record the particle settling process and determine the influences of the eccentricity,the dimensionless diameter,the fluid rheological properties,and the solid particle characteristics on the wall factor and the particle settling *** functional relationship among the dimensionless diameter,the particle Reynolds number,and the wall factor was determined by using the method of controlling *** eccentric annulus wall factor model with average relative error of 5.16%was ***,by introducing Archimedes number,an explicit model of particle settling velocity in the eccentric annulus with average relative error of 10.17%was established.A sample calculation of particle settling vel

关键词： Cuttings transport Particle settling velocity Eccentric annulus Wall effect

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Recent advances in vacancy engineering for reliable lithiumsulfur batteries

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Rare Metals 2024年第2期43卷 455-477页

作者： wen-Dong Liu Xiao Tang Jun-An Feng Chao-Yue Zhang Hao Liu Chuan Shi Xiao-xian Zhao Jian-Jun song College of Physics School of Chemistry and Chemical EngineeringQingdao UniversityQingdao266071China Faculty of Science Centre for Clean Energy TechnologySchool of Mathematical and Physical SciencesUniversity of Technology SydneySydneyNSW2007Australia Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding071001China

The high-energy-density and low-cost features endow lithium-sulfur batteries with broad application ***,many drawbacks,especially the detrimental shuttle effect,have hindered the further development of *** response,a lot of new structures have been applied to suppress the shuttle effect and promote the development of ***,vacancy engineering has gained the attention of researchers due to its unique electronic *** review aims to analyze the application of vacancy engineering in ***,the electrochemistry of LSBs has been systematically discussed and the existing challenges as well as improvement tactics of LSBs have also been ***,the preparation methods and characterization technologies of various vacancies are summarized,including oxygen vacancies,sulfur vacancies,selenium vacancies,other anion vacancies,cation vacancies,*** latest applications of vacancy engineering in LSBs are also summarized in this ***,some prospects and insights for further investigation and practical application of vacancy engineering in LSBs are put forward.

关键词： Lithium-sulfur batteries(LSBs) Defects Vacancy engineering Electronic structure Shuttle effect

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Strain-induced Precipitation Behavior ofδPhase in Inconel 718 Alloy

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Journal of Iron and Steel Research International 2014年第3期21卷 375-381页

作者： xian-ping WEI wen-jie ZHENG Zhi-gang song Ting LEI Qi-long YONG Qing-cheng XIE Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Central Iron and Steel Research Institute No.704 Institute of China Shipbuilding Industry Corporation

To study the precipitation dynamics of 3 phase in Inconel 718 alloy, two-stage interrupted compression method was used in the region of cold deformation temperatures and the temperatures range from 875 to 975 ℃. The precipitation-time-temperature （PTT） curve of 3 phase was obtained by analyzing the softening kinetics curves. For verifying the type of the precipitates and confirming the validity of the test, the transmission electron microscopy （TEM）, scanning transmission electron microscopy （STEM） and energy dispersion spectrum （EDS） were em- ployed. Experimental results indicated that the PTT curve for 3 precipitation exhibited a typical ＂C＂ shape and the nose points of start and finish precipitation were about 5 s at 920 ℃ and 2 815 s at 940 ℃, respectively. In addition, the nucleation of δ was heterogeneous. The nucleation sites varied with temperatures, including dislocation, grain boundary and stacking fault within γ″ phase. And 3 particles grew quickly at higher temperature with lower density. Moreover, the driving force of nucleation was mainly including chemical free energy, interracial energy and disloca- tion distorted energy. And the dislocation distorted energy could decide the density of nucleation in the strain-induced process.

关键词： Inconel 718 alloy strain-induced precipitation cold deformation nucleation site

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Elemental Partitioning Characteristics of Equilibrium Phases in Inconel 718 Alloy at 600-1100℃

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Journal of Iron and Steel Research International 2013年第6期20卷 88-94页

作者： WEI xian-ping ZHENG wen-jie song Zhi-gang LEI Ting YONG Qi-long XIE Qing-cheng Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Central Iron and Steel Research Institute No.704 Institute of China Shipbuilding Industry Corporation

The optimization of heat treatment and chemical composition for Inconel 718 alloy has been investigated uninterruptedly because of its excellent mechanical properties and metallurgical *** species , chemical compositions and content of equilibrium phases of Inconel 718alloy in the temperature range of 600-1 100℃ were calculated by using thermodynamic software ＂ Thermo-Calc ＂ and the latest relevant datebase of Ni-base superalloys.A concept of elemental partitioning fraction was used to study the partitioning characteristics of alloying elements in each equilibrium phase at different temperatures , such as Ni , Cr , Fe , Nb , Mo , Al , Ti and C , and some calculation results were confirmed under a scanning transmission electron microscope （ STEM ） .The results showed that the elemental partitioning characteristics with the change of temperature revealed the selective partitioning characteristic of alloying elements in equilibrium phases at different temperatures , such as Nb was mainly distributed in δ and γ′phase , C in carbides , Al and Ti in γ′phase and Cr , Mo in Laves *** the same time , the effect of the change of component and quantity for each precipitated phase on matrix phase can be helpfully understood , which provided a theoretic foundation to optimize the chemical composition and heat treatment in different environments for Inconel 718alloy.

关键词： Inconel 718alloy Thermo-Calc thermodynamic calculation elemental partitioning fraction

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Effects of Carbon Content on Mechanical Properties of Inconel 718 Alloy

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Journal of Iron and Steel Research International 2015年第1期22卷 78-83页

作者： wen-jie ZHENG xian-ping WEI Zhi-gang song Qi-long YONG Han FENG Qing-cheng XIE Central Iron and Steel Research Institute Materials Research Center Dong Fang Steam Turbine Works No.704 Institute of China Shipbuilding Industry Corporation

For improving the service performance of Inconel 718 alloy, especially used as a corrosion-resistant alloy for special environment, the microstructure and mechanical property of different carbon-containing Inconel 718 alloys were investigated by the Thermo-Calc software and experiments. The experimental results indicated that the mor- phology, distribution and types of carbides mainly existing in the form of MC＇were hardly influenced by solution treatment at 1050 ℃ for 1 h. The precipitation amount and particle size of carbides decreased with the decrease of carbon content, which was the main reason resulting in the increase of ductility and toughness. In addition, moving dislocation could be restrained by the precipitation of carbides. Therefore, the strength could benefit from the precip- itation strengthening of carbides when the precipitation of γ′/γ″ phase was not influenced by the precipitation of carbides.

关键词： Inconel 718 alloy microstructure carbide mechanical property precipitation strengthening

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Leaf chlorophyll content retrieval of wheat by simulated RapidEye, Sentinel-2 and EnMAP data

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Journal of Integrative Agriculture 2019年第6期18卷 1230-1245页

作者： CUI Bei ZHAO Qian-jun HUANG wen-jiang song Xiao-yu YE Hui-chun ZHOU xian-feng Institute of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijing 100094P.R.China University of Chinese Academy of Sciences Beijing 100094P.R.China Key Laboratory of Earth Observation Hainan ProvinceSanya 572029P.R.China Beijing Research Center for Information Technology in Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China College of Life Information Science and Instrument Engineering Hangzhou Dianzi UniversityHangzhou 310018P.R.China

Leaf chlorophyll content(LCC)is an important physiological indicator of the actual health status of individual *** accurate estimation of LCC can therefore provide valuable information for precision field ***-edge information from hyperspectral data has been widely used to estimate crop ***,after the advent of red-edge bands in satellite imagery,no systematic evaluation of the performance of satellite data has been *** this end,we analyze herein the performance of winter wheat LCC retrieval of currant and forthcoming satellites(RapidEye,Sentinel-2 and EnMAP)and their new red-edge bands by using partial least squares regression(PLSR)and a vegetation-indexbased *** satellite spectral data were obtained by resampling ground-measured hyperspectral data under various field conditions and according to specific spectral response functions and spectral *** results showed:1)This study confirmed that RapidEye,Sentinel-2 and EnMAP data are suitable for winter wheat LCC *** the PLSR approach,Sentinel-2 data provided more accurate estimates of LCC(R2=0.755,0.844,0.805 for 2002,2010,and 2002+2010)than do RapidEye data(R2=0.689,0.710,0.707 for 2002,2010,and 2002+2010)and EnMAP data(R2=0.735,0.867,0.771 for 2002,2010,and 2002+2010).For index-based approaches,the MERIS terrestrial chlorophyll index,which is a vegetation index with two red-edge bands,was the most sensitive and robust index for LCC for both the Sentinel-2 and EnMAP data(R2≥0.628),and the indices(NDRE1,SRRE1 and CIRE1)with a single red-edge band were the most sensitive and robust indices for the RapidEye data(R2≥0.420);2)According to the analysis of the effect of the wavelength and number of used red-edge spectral bands on LCC retrieval,the short-wavelength red-edge bands(from 699 to 734 nm)provided more accurate predictions when using the PLSR approach,whereas the long-wavelength red-edge bands(740 to 783 nm)gave more accurate predictions when using

关键词： leaf chlorophyll content RapidEye Sentinel-2 EnMAP red-edge band

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Noninvasive beam diagnosis based on the TM_(010)mode

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Nuclear Science and Techniques 2024年第7期35卷 115-125页

作者： Chuang-Ye song wen-Hui Huang Department of Engineering Physics Tsinghua University BeijingBeijing100084China of Education Beijing100084China

A resonant cavity based on the TM_(010)mode is an effective tool for noninvasive beam characterization. This technique has the advantages of a high signal-to-noise ratio, compact structure, and is related to multiple parameters compared with other beam monitors. In this study, high-precision measurements of the bunch charge, arrival time, bunch length, and energy parameters based on the TM_(010)mode are discussed. A cavity beam arrival time monitor(BAM) utilizing a phase cavity has been widely used in many facilities. Regarding bunch-length measurements, the influence of the beam energy, beam offset,and longitudinal spectrum on the TM_(010)mode are carefully considered to reduce errors, and the theoretical resolution of two cavities with different frequencies is analyzed. Owing to the dependence of the beam velocity of the beam loss factor, this method can also be used for the detection low beam energy using two cavities with the same frequency but different cavity lengths. A set of three cavities with different lengths and frequencies of 1.902 and 11.424 GHz is presented for measuring the four aforementioned parameters.

关键词： TM_(010)mode Noninvasive diagnosis Beam length Low energy

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Silver Chloride Loaded Mesoporous Silica Particles and Their Application in the Antibacterial Coatings on Denture Base

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Chemical Research in Chinese Universities 2013年第6期29卷 1214-1218页

作者： LI xian-liang ZUO Wei-wen LUO Meng SHI Zuo-sen CUI Zhan-chen ZHU song State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin University Changchun 130012 P.R.China Hospital of Stomatology Jilin University Changchun 130021 P.R.China

Thiol-functionalized MCM-41 type mesoporous silica particles（MSPs） were prepared and loaded with silver chloride to act as antibacterial agents. The antibacterial activity of the silver chloride loaded MSPs（AgCI-MSPs） was evaluated by the minimum bactericidal concentration（MBC） against Candida albieans（ATCC 10231）. The AgC1-MSPs with the highest antibacterial activity were then dispersed in hybrid coatings with different mass ratios to fabricate antibacterial coatings. The antibacterial activity of the coatings was tested against Candida albicans{ATCC 10231） and Streptococcus mutans（ATCC 25175）. The resulting antibacterial coatings exhibited high antibacterial activity, good adhesion to the substrate and high hardness.

关键词： Mesoporous silica Silver chloride antibacterial Coating

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The evolution of cooperation in public good game with deposit

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Chinese Physics B 2019年第8期28卷 22-30页

作者： xian-Jia Wang wen-Man Chen Economics and Management School Wuhan UniversityWuhan 430070China Institute of System and Engineer Wuhan UniversityWuhan 430070China

The emergence of cooperation still remains a fundamental conundrum in the social and behavior *** introduce a new mechanism,deposit mechanism,into theoretical model to explore how this mechanism promotes cooperation in a well-mixed ***,we extend the common binary-strategy combination of cooperation and defection in public good game by adding a third strategy,namely,deposit *** players with deposit cooperation strategy pay a deposit in advance to obtain the benefits of public good at a lower contributions compared with the players with cooperation strategy,when the provision of public good is ***,we explore the evolution of cooperation in the public good game with deposit by means of the replicator *** computations and stimulations show that the deposit mechanism can promote cooperation in a well-mixed population,and the numbers of equilibrium point are determined by variables of public good *** the one hand,when the coexistence of cooperators and defectors is the stable equilibrium point in the evolutionary system,increasing the threshold of public good and adopting the weak altruism way for share benefits can enhance the level of cooperation in the *** the other hand,if the coexistence of deposit cooperators and defectors is the stable equilibrium point,it is effective to promote the deposit cooperation by lowering the values of discount and deposit,and raising the threshold of public good.

关键词： evolutionary game theory cooperation deposit weak altruism discount rate

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Heat Treatment of Spray Deposition SiCp/6066 Aluminum Matrix Composites

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Journal of Central South University 2000年第2期12卷 61-64页

作者： Gong Hao-ran Li wen-xian Department of Materials Science and Engineering Central South University of TechnologyChangsha 410083China

Heat treatment of spray deposition 10% SiCp/6066 ( φ (SiCp)=10%) composites was investigated by means of hardness measurement. The results show that heat treatment technology is influenced by the presence of SiC particles. Compared with the base alloy 6066, the composites have lower burning temperature and is burnt at 540 ℃ due to the enrichment of Mg and Cu atoms in the SiCp/6066 interfaces. As a result, solution treatment of the composites should be carried out at lower temperature. The aging parameter values such as the aging temperature, the precipitation temperature of β′ and β phases, as well as the peak aging time, become lower. The optimum heat treatment process conditions are that the composites are solution treated at 515 ℃ and aged at 165 ℃ for 5 h.

关键词： spray deposition composites solution treatment temperature aging

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