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Particuology 2010年第2期8卷 176-185页

作者： junwu wang State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Science P.O. Box 353 Beijing 100190 China

Turbulent fluidized bed reactors are widely used in industry. However, CFD simulations of the hydrody- namic characteristics of these reactors are relatively sparse, despite the urgent demand from industry. To address this problem, Eulerian simulations with an EMMS-based sub-grid scale model, accounting for the effect of sub-grid scale structures on the inter-phase friction, are performed to study the hydrodynamics inside a large-scale turbulent fluidized bed of FCC particles. It is shown that the simulated axial and radial solid concentration profiles, entrained solid fluxes and standard deviation of the solid concentration fluc- tuation agreed well with experimental data available in the literature. In-depth analysis of time-averaged particle velocity and solid concentration shows that a dense-suspension upflow regime coexists with fast fluidization regime in this bed, which is reminiscent of the hydrodynamic characteristics in high-density circulating fluidized bed （CFB） risers, even though they are operated in different fluidization regimes. The Reynolds stresses in turbulent fluidized beds are anisotropic, but the degree of anisotropy is far less pro- nounced than the reported values in CFB risers. It was also found that the solid concentration fluctuation and axial particle velocity fluctuation are strongly correlated. 2009 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

关键词： FluidizationEulerian simulationEMMS modelSub-grid scale model

Special Issue for the Future Chemical Engineering Scholars of Global Chinese Chemical Engineering Symposium

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Frontiers of Chemical Science and Engineering 2022年第6期16卷 775-776页

作者： Jesse Zhu junwu wang Particle Technology Research Centre Western UniversityLondonOntario N6A 5B9Canada State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

The Global Chinese Chemical Engineering Symposium(GCCES)is a prestigious and world-wide platform for the communication and academic exchange of chemical science and *** addition to its key roles in international academic exchanges and collaborations,as well as cross-disciplinary integration and industrial-academic co-operation,the GCCES strongly promotes the professional development of young Chinese chemical engineers and scientists by founding series of special forums for the winners of the Excellent Postgraduate Academic Forum,the Young Researchers Forum,the Future Chemical Engineering Scholars,and the International Award for Outstanding Young Chemical Engineers.

关键词： founding Global Scholars

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Special Issue for the 14th Global Chinese Chemical Engineering Symposium

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1321-1322页

The Global Chinese Chemical Engineering Symposium(GCCES)is a prestigious and world-wide platform for the communication and academic exchange of chemical science and *** special issue is a collection of the keynote lectures presented by the winners of Future Chemical Engineering Scholars,the Global Award for Outstanding Young Female Chemical Engineers,and the International Award for Outstanding Young Chemical Engineers,selected by the International Scientific Committee of the GCCES.

关键词： engineering. Global Engineers

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Editorial for the Special Issue on Frontiers of Chemical Engineering

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Engineering 2021年第1期7卷 1-2页

作者： Jesse Zhu junwu wang Particle Technology Research Centre University of Western OntarioLondonON N6A 5B9Canada State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

The Eleventh Global Chinese Chemical Engineers Symposium(GCCES-11)was held on August 2–5,2019,in Chengdu,China,organized by the School of Chemical Engineering of Sichuan *** GCCES is a prestigious and world-wide academic exchange platform organized by the Global Academy of Chinese Chemical Engineers(GACCE),for chemical engineers and scientists interested in innovation and professional development to gather,exchange ideas,and make *** focuses on a wide range of topics relevant to cutting-edge research,new technologies,and areas of emerging growth in chemical engineering and *** GCCES strongly promotes international academic exchanges and collaborations,facilitates cross-disciplinary integration and industrial-academic research co-operation,and encourages the professional development of young Chinese chemical engineers and scientists on the world stage.

关键词： professional engineer organized

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车联网卡实名登记系统应用分析

汽车电器 2025年第2期 18-21,29页

作者：彭杰方剑王君武王海波湖北汽车工业学院湖北十堰435003 东风商用车有限公司湖北十堰442000 湖北正奥比克希汽车电气系统有限公司湖北十堰442000

车联网卡作为连接车辆与互联网的桥梁,在提供便捷服务的同时,也伴随着信息安全和隐私保护的严峻挑战。随着数字化经济的快速发展,电信诈骗犯罪日益猖獗,车联网卡也成为了不法分子的潜在利用工具。设计开发车联网卡实名登记系统,运用光... 详细信息

车联网卡作为连接车辆与互联网的桥梁,在提供便捷服务的同时,也伴随着信息安全和隐私保护的严峻挑战。随着数字化经济的快速发展,电信诈骗犯罪日益猖獗,车联网卡也成为了不法分子的潜在利用工具。设计开发车联网卡实名登记系统,运用光学字符识别(OCR)与人脸识别等先进技术,实现人、车、卡三者信息的紧密绑定。这一系统的推出,不仅筑牢网络安全的防线,也进一步增强数据安全和个人隐私安全的保障力度,为构建和谐社会注入强大的科技力量。

关键词：车联网卡实名登记管理系统光学字符识别人脸识别

Simulation of the L-valve in the circulating fluidized bed with a coarse-grained discrete particle method

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Particuology 2024年第7期90卷 266-280页

作者： Ruixiang Tang Zheng Zou Ji Xu junwu wang Qingshan Zhu Hongzhong Li State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesP.O.Box 353Beijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing100190China

Stable and controllable solid flow is essential in circulating fluidized bed (CFB) systems. The L-valve is a typical non-mechanical valve that can provide flexible solid feeding. The investigation of the solid circulation rate and the hydrodynamic characteristics of the L-valve is crucial to its design and operation. The gas-solid flow in the L-valve of a full-loop CFB is studied with the coarse-grained discrete particle method (EMMS-DPM). Good agreements on the solid circulation rate and the pressure drop through the L-valve are achieved between the simulated and experimental data. The solid circulation rate increases linearly with the aeration velocity until the stable particle circulation of the CFB is destroyed. The flow patterns in the horizontal section of L-valve are gas-solid slug flow above the stationary solid layer and the moving solid layer, respectively. The effects of L-valve geometric parameters on the solid flow characteristics are also investigated. The results indicate that reducing the diameter and length of the horizontal section of L-valve can improve the solid transport efficiency, especially at low aeration velocity. Besides, the solid conveying capacity and flow stability are improved when the sharp bend of L-valve is modified to be a gradual bend.

关键词： L-valve Circulating fluidized bed Full loop Discrete particle method Gas-solid flow

Characteristics of laser induced discharge tin plasma and its extreme ultraviolet radiation

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Frontiers of Optoelectronics 2021年第3期14卷 352-359页

作者： junwu wang Xinbing wang Duluo ZUO Wuhan National Research Center for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

In this paper,a CO_(2) laser induced discharge plasma extreme ultraviolet(EUV)source experimental device was *** optical emission spectroscopy was used to diagnose the characteristics of the plasma,and the evolution of electron temperature and electron density with time was *** influence of discharge voltage on plasma parameters was analyzed and *** EUV radiation characteristics of the plasma were investigated by self-made grazing incidence EUV *** EUV radiation intensity and conversion efficiency were discussed.

关键词： extreme ultraviolet(EUV)radiation laser induced discharge plasma optical emission spectroscopy electron temperature and density

Discrete particle methods for engineering simulation:Reproducing mesoscale structures in multiphase systems

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Resources Chemicals and Materials 2022年第1期1卷 69-79页

作者： Ji Xu Peng Zhao Yong Zhang junwu wang Wei Ge State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesP.O.Box 353Beijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China

Most natural resources are processed as particle-fluid multiphase systems in chemical,mineral and material indus-tries,therefore,discrete particles methods(DPM)are reasonable choices of simulation method for engineering the relevant processes and ***,direct application of these methods is challenged by the complex multiscale behavior of such systems,which leads to enormous computational cost or otherwise qualitatively inac-curate description of the mesoscale *** coarse-grained DPM based on the energy-minimization multi-scale(EMMS)model,or EMMS-DPM,was proposed to reduce the computational cost by several orders while main-taining an accurate description of the mesoscale structures,which paves the way for its engineering *** empowered by the high-efficiency multi-scale DEM software DEMms and the corresponding customized heterogeneous supercomputing facilities with graphics processing units(GPUs),it may even approach realtime simulation of industrial *** short review will introduce the principle of DPM,in particular,EMMS-DPM,and the recent developments in modeling,numerical implementation and application of large-scale DPM which aims to reach industrial scale on one hand and resolves mesoscale structures critical to reaction-transport coupling on the other *** review finally prospects on the future developments of DPM in this direction.

关键词： Coarse-graining Discrete element method(DEM) EMMS-DPM(EMMS-based discrete particle method) GPU-CPU heterogeneous computing Mesoscale

A parathyroid hormone related supramolecular peptide for multi-functionalized osteoregeneration

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Bioactive Materials 2024年第4期34卷 181-203页

作者： Zhuowen Hao Qinyu Feng Yi wang Ying wang Hanke Li Yingkun Hu Tianhong Chen junwu wang Renxin Chen Xuan Lv Zhiqiang Yang Jiayao Chen Xiaodong Guo Jingfeng Li Department of Orthopedics Zhongnan Hospital of Wuhan UniversityWuhan430071China Department of Obstetrics and Gynecology Renmin Hospital of Wuhan UniversityWuhan430060China Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Supramolecular peptide nanofiber hydrogels are emerging biomaterials for tissue engineering,but it is difficult to fabricate multi-functional systems by simply mixing several short-motif-modified supramolecular peptides because relatively abundant motifs generally hinder nanofiber cross-linking or the formation of long *** bioactive factors to the assembling backbone is an ideal strategy to design multi-functional supramolecular peptides in spite of challenging synthesis and ***,a multi-functional supramolecular peptide,P1R16,is developed by coupling a bioactive factor,parathyroid hormone related peptide 1(PTHrP-1),to the basic supramolecular peptide RADA16-I via solid-phase *** is found that P1R16 self-assembles into long nanofibers and co-assembles with RADA16-I to form nanofiber hydrogels,thus coupling PTHrP-1 to hydrogel matrix.P1R16 nanofiber retains osteoinductive activity in a dose-dependent manner,and P1R16/RADA16-I nanofiber hydrogels promote osteogenesis,angiogenesis and osteoclastogenesis in vitro and induce multi-functionalized osteoregeneration by intramembranous ossification and bone remodeling in vivo when loaded to collagen(Col)*** red blood marrow formation,ideal osteointegration and adapted degradation are observed in the 50%P1R16/Col scaffold ***,this study provides a promising strategy to develop multi-functional supramolecular peptides and a new method to topically administrate parathyroid hormone or parathyroid hormone related peptides for non-healing bone defects.

关键词： Supramolecular peptide nanofiber hydrogels Parathyroid hormone Self-assembly Co-assembly Bone tissue engineering

Quantifying growth and breakage of agglomerates in fluid-particle flow using discrete particle method

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Chinese Journal of Chemical Engineering 2018年第5期26卷 914-921页

作者： Lingfeng Zhou junwu wang Wei Ge Shiwen Liu Jianhua Chen Ji xu Limin wang Feiguo Chen Ning Yang Rongtao Zhou Lin Zhang Qi Chang Philippe Ricoux Alvaro Fernandez State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Tianjin University Tianjin 300072 China TOTALSA - R&D Groupe Paris 92069 France Total Research & Technology Feluy Belgium Germany

The cohesive solids in liquid flows are featured by the dynamic growth and breakage of agglomerates, and the difficulties in the development, design and optimization of these systems are related to this significant *** this paper, discrete particle method is used to simulate a solid–liquid flow system including millions of cohesive particles, the growth rate and breakage rate of agglomerates are then systematically investigated. It was found that the most probable size of the agglomerates is determined by the balance of growth and breakage of the agglomerates the cross point of the lines of growth rate and breakage rate as a function of the particle numbers in an agglomerate, marks the most stable agglomerate size. The finding here provides a feasible way to quantify the dynamic behaviors of growth and breakage of agglomerates, and therefore offers the possibility of quantifying the effects of agglomerates on the hydrodynamics of fluid flows with cohesive particles.

关键词： Agglomerate Growth and breakage Quantification Discrete particle method