Analysis of flow pattern change in horizontal mini-channel under electric field force

2021 ◽  
Vol 121 ◽  
pp. 105081
Author(s):  
Hong-Wei Li ◽  
Ya-Cheng Wang ◽  
Chang-He Du ◽  
Wen-Peng Hong
Keyword(s):  
Electric Field ◽  
Flow Pattern ◽  
Field Force ◽  
Pattern Change ◽  
Electric Field Force

Kinetic Characteristic of the Dust Particles around the Insulators

2012 ◽  
Vol 455-456 ◽  
pp. 271-277 ◽  
Author(s):  
Jing Wang ◽  
Xi Dong Liang ◽  
Yu Liu
Keyword(s):  
Steady State ◽  
Electric Field ◽  
Drag Force ◽  
Kinetic Characteristic ◽  
Operating Conditions ◽  
Dust Particles ◽  
Field Force ◽  
Polarization Force ◽  
Electric Field Force ◽  
Accumulation Characteristic

Contamination accumulation characteristic of the insulators depends on the kinetic characteristic of the particles moving around the insulators to a great degree. There are many forces acting on the particles due to the combined influence of the electric field, the air fluid field and the gravitational field. The main four forces, which are the polarization force, the electric field force, the steady-state drag force and the gravitational force, were analyzed. Their effects on the moving particles’ trajectories were studied by both experiments and numerical calculation. The results indicate that the polarization force acts where the strength of the electric field changes strongly. Once the particles are charged, the electric field force acts and can drive the particles moving along the electric field lines. When there is a strong wind, the steady-state drag force is dominant and the particles move with the wind. These results can better explain the contamination accumulation characteristic of different insulators under different operating conditions.

Research on High Voltage Electromagnetic Electrostatic Spinning Machine Electric Field Analysis

2014 ◽  
Vol 684 ◽  
pp. 259-263
Author(s):  
Yang Tao Yu ◽  
Peng Cheng Zhao ◽  
Xin Wang ◽  
Ye Tian
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Collection Efficiency ◽  
Field Analysis ◽  
Collection Rate ◽  
Field Force ◽  
Electrostatic Spinning ◽  
Electric Field Analysis ◽  
Electric Field Force ◽  
Electrostatic Mechanism

The main approach to obtain nanomaterial is nanospinning technology at present. Due to the inherent characteristics of nanomaterial itself, which are easily affected by the electric field force effect of spinning. And for the spinning machine nozzle electric field is relatively complex, so nanospinning products at present, is easily affected by the electric field force and dissipated. So, the nanospinning collection efficiency is low. This paper adopts an oval enhanced electrostatic mechanism, method of using additional electric field to improve the balance obtained nanomaterial collection rate. And the construct high voltage electrostatic spinning machine virtual prototype,complete the analysis of the improved method of static electric field. The analysis results indicate that the electric field can effectively improve the collection rate of nanospinning. Through the study of the additional electric field strength further size on the electric field force and the ellipse, can more effectively improve the collection rate of nanospinning products.

scholarly journals The evolution of electron current sheet and formation of secondary islands in guide field reconnection

2011 ◽  
Vol 18 (5) ◽  
pp. 727-733 ◽  
Author(s):  
C. Huang ◽  
Q. Lu ◽  
Z. Yang ◽  
M. Wu ◽  
Q. Dong ◽  
...  
Keyword(s):  
Electric Field ◽  
Current Sheet ◽  
Diffusion Region ◽  
Two Dimensional ◽  
Electron Current ◽  
Particle In Cell ◽  
Field Force ◽  
Guide Field ◽  
Tearing Instability ◽  
Electric Field Force

Abstract. Two-dimensional (2-D) particle-in-cell (PIC) simulations are performed to investigate the evolution of the electron current sheet (ECS) in guide field reconnection. The ECS is formed by electrons accelerated by the inductive electric field in the vicinity of the X line, which is then extended along the x direction due to the imbalance between the electric field force and Ampere force. The tearing instability is unstable when the ECS becomes sufficiently long and thin, and several seed islands are formed in the ECS. These tiny islands may coalesce and form a larger secondary island in the center of the diffusion region.

Sticking Analysis of the Bistable Inductive Micro-Switch

2010 ◽  
Vol 97-101 ◽  
pp. 2876-2879 ◽  
Author(s):  
Wen Chao Tian ◽  
Huo Rong Ren ◽  
Liin Bin Wang ◽  
Huan Ling Liu
Keyword(s):  
Electric Field ◽  
Rough Surface ◽  
Edge Effect ◽  
Random Distribution ◽  
Field Force ◽  
Rough Model ◽  
Electric Field Force

Problems of the “false closure” and “instant closure” affect the antijamming capability and reliability of the micro-switch. Based on the sticking action, a new bistable micro-switch is put forward. A sine model is presented to describe the random distribution of the MEMS rough surface. Based on the sine rough model, the Casimir adhesion is simulated. The electric field force, which includes the edge effect, is discussed. Finally the threshold structure size is obtained, which can control the micro-switch to close stably and trigger automatically.

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