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Toward Greener and Smarter Process Industries

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Engineering 2017年第2期3卷 152-153页

作者： wei ge State Key Laboratory of Multiphase Complex Systems. Institute of Process Engineering. Chinese Academy of Sciences Beijing 100190. China University of Chinese Academy of Sdences Beifing 100049 China

The main mission of the process industries is to process resourc-es and energies into a form that can be utilized in other industriesand throughout society. In this sense, process industries cover a vastterritory, encompassing the chemical/biochemical, material, mining,metallurgical, power, food, and even pharmaceutical industries; inaddition, they are closely related to mechanical, civil, electrical, andelectronic industries, as well as to emerging fields such as biotech-nology, nanotechnology, and information technologies.

关键词：期刊编辑工作规范写作方法

Simulation of dynamic fluid-solid interactions with an improved direct-forcing immersed boundary method

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Particuology 2015年第1期13卷 22-34页

作者： Shengbin Di wei ge State Key Laboratory of Multiphase Complex System Institute of Process EngineeringChinese Academy of Sciences University of Chinese Academy of Sciences

Dynamic fluid-solid interactions are widely found in chemical engineering, such as in particle-laden flows, which usually contain complex moving boundaries. The immersed boundary method （IBM） is a convenient approach to handle fluid-solid interactions with complex geometries. In this work, Uhlmann＇s direct-forcing IBM is improved and implemented on a supercomputer with CPU-GPU hybrid architec- ture. The direct-forcing IBM is modified as follows： the Poisson＇s equation for pressure is solved before evaluation of the body force, and the force is only distributed to the Cartesian grids inside the immersed boundary. A multidirect forcing scheme is used to evaluate the body force. These modifications result in a divergence-free flow field in the fluid domain and the no-slip boundary condition at the immersed boundary simultaneously. This method is implemented in an explicit finite-difference fractional-step scheme, and validated by 2D simulations of lid-driven cavity flow, Couette flow between two concentric cylinders and flow over a circular cylinder. Finally, the method is used to simulate the sedimentation of two circular particles in a channel. The results agree very well with previous experimental and numerical data, and are more accurate than the conventional direct-forcing method, especially in the vicinity of a moving boundary.

关键词： Immersed boundary method Fluid-solid interactions No-slip condition Divergence-free condition CPU-GPU hybrid architecture

EMMS-based modeling of gas-solid generalized fluidization:Towards a unified phase diagram

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Chinese Journal of Chemical Engineering 2021年第1期34卷 27-34页

作者： Juanbo Liu Xinhua Liu wei ge State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Dalian National Laboratory for Clean Energy Dalian 116023China

Hydrodynamic features of gas-solid generalized fluidization can be well expressed in the form of phase diagrams,which are important for engineering *** structure presents almost universally in generalized fluidization and should be considered in such phase ***,current phase diagrams were mainly proposed for cocurrent upward flow according to experimental data or empirical correlations with homogeneous *** energy-minimization multiscale(EMMS)model has shown the capability of capturing mesoscale structure in generalized fluidization,so EMMS-based phase diagrams of generalized fluidization were proposed in this article,which describe more reasonable global hydrodynamics over all regimes including the important engineering phenomena of choking and *** characteristics were also found in discrete particle simulation under various *** wider range of application,the typical hydrodynamic parameters of the phase diagrams were correlated to non-dimensional numbers reflecting the effects of material properties and operation *** study thus shows a possible route to develop a unified phase diagram in the future.

关键词： Fluidization Phase diagram Dimensionless correlation Mesoscale Mathematical modeling EMMS

Soft coarse-grained particle model for particle-fluid systems

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Particuology 2024年第1期84卷 178-193页

作者： Yanhao Ye Ji Xu wei ge State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing100190China

By modeling a group of neighboring real particles as a single coarse-grained particle(CGP),discrete particle method(DPM)is now capable of simulating industrial-scale particle-fluid ***,a systematic approach to determine the CGP properties and develop their interaction models is still lacking,which casts uncertainty on the predictivity of the *** this study,collisions between predefined particle groups are analyzed to construct kernel functions for modeling the CGPs and then the model parameters are determined by equating the statistical properties of the CGPs and the real particles in the physical process *** approach is implemented for homogeneous cooling of granular gas,then demonstrated effective in simulating experimental fluidized beds.

关键词： Coarse-grain(CG) Discrete particle method(DPM) Fluidized bed Multi-scale simulation

Theoretical study on the stability of nanobubbles and its verification in molecular dynamics simulation

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Particuology 2024年第4期87卷 99-105页

作者： Sheng Mi Chaofeng Hou wei ge School of Chemical Engineering and Technology Tianjin UniversityTianjin300072China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing.100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

The stability of vapor nanobubbles in bulk liquid was investigated theoretically and the critical bubble size was derived from macroscale thermodynamic equations,below which the system destabilizes with sharp drop in *** critical size was quantitatively verified in molecular dynamic simulation using the Lennard-Jones model of argon,where stronger attraction between the molecules at lower density is found to contribute most to the drop of system pressure and,as the Laplace pressure on the curved bubble interface fails to balance the pressure difference across the interface,the bubbles become *** theoretical model could be extended to other systems where reliable equations of state and interfacial tension are available.

关键词： Nanobubble Stability Phase diagram Critical size

Relative Superlinearity Implies Infinitely Many Solutions to Sturm-Liouville BVPs with Laplacian Type Operators

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Acta Mathematica Sinica,English Series 2005年第5期21卷 1015-1026页

作者： wei Gao ge wei Ping SUN Department of Applied Mathematics Beijing Institute of Technology Beijing 100081 P. R. China

By the use of continuation theorems and the duality principle it＇s proved that for both homogeneous and nonhomogeneous Sturm-Liouville boundary value problems with Laplacian type operators, relative superlinearity im... 详细信息

关键词： p-Laplacian-like operator periodic solutions degree

Focusing on the meso-scales of multi-scale phenomena-In search for a new paradigm in chemical engineering

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Particuology 2010年第6期8卷 634-639页

作者： Jinghai Li wei ge wei Wang Ning Yang The EMMS Group State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

To celebrate the 90th birthday of Professor Mooson Kwauk, who supervised the multi-scale research at this Institute in the last three decades, we dedicate this paper outlining our thoughts on this subject accumulated from our previous studies. In the process of developing, improving and extending the energy- minimization multi-scale （EMMS） method, we have gradually recognized that meso-scales are critical to the understanding of the different kinds of multi-scale structures and systems. It is a common challenge not only for chemical engineering but also for almost all disciplines of science and engineering, due to its importance in bridging micro- and macro-behaviors and in displaying complexity and diversity. It is believed that there may exist a common law behind meso-scales of different problems, possibly even in different fields. Therefore, a breakthrough in the understanding of meso-scales will help materialize a revolutionary progress, with respect to modeling, computation and application.

关键词： Meso-scale Multi-scale Complex system EMMS Multi-phase High performance computation

Pitch control strategy before the rated power for variable speed wind turbines at high altitudes

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Journal of Hydrodynamics 2019年第2期31卷 379-388页

作者： Ming-wei ge wei-ming Ke Hong-xia Chen School of Renewable Energy North China Electric Power UniversityBeijingl 02206China School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China

The wind turbines in the world's highest wind farm with an altitude of over 4 000 m in Naqu county of China were put into operation in *** with the wind turbines at lower altitudes,the rated wind speed of these wind turbines are much larger,and the corresponding tip-speed ratio at the rated power reduces significantly due to the lower air ***,the power coefficient at the point of the rated power is decreased to a rather low *** improve the performance of the wind turbines at very high altitudes,this paper proposes a new pitch control strategy for variable speed wind turbines at the constant-speed phase,especially at the rated-speed phase before the rated power is *** is shown that the new pitch control strategy works very well for the wind farms at very high altitude and with low air density,with the catch of the wind energy enhaneed and the aerodynamic loads significantly reduced.

关键词： Wind turbine pitch control strategy high altitudes

FMRP： a new chapter with chromatin

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Protein & Cell 2014年第12期5卷 885-888页

作者： Qingzhong He wei ge National Key Laboratory of Medical Molecular Biology & Department of Immunology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences School of Basic Medicine Peking Union Medical College Beijing 100005 China

EDITOR＇S NOTE：Recently, Alpatov et al. and Zhang et al. reported the nuclear function of FMRP in replication stress-induced DNA damage response. As a well-known cytoplasmic protein functioning in pathogenesis of fragile X syndrome. FMRP＇s existence and function in nucleus should be cautiously considered. Here, the authors discuss the works in an alternative perspective. They consider：

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