Manipulation of Bio-Particles by Electrokinetics

2004 ◽  
Author(s):  
Kuang Han Chu ◽  
Cheng-Hsien Liu
Keyword(s):  
Electric Field ◽  
Object Manipulation ◽  
High Electric Field ◽  
Experimental Results ◽  
Ac Electrokinetics ◽  
Modeling Simulation ◽  
Simulation Results ◽  
Electrokinetic Force ◽  
Anisotropic Etch

We propose and develop a new bio-particles manipulation device that has the similar size order as targeted bio-objects and is a non-contact approach to bio-objects using AC electrokinetics. We use micro pyramid array made by MEMS KOH anisotropic etch in our design. Simulation results using CFD-ACE+ and ANSYS show extremely high electric field around micro pyramids for our concept proof. Experimental results successfully demonstrate the feature of micro-object manipulation for our device. In this paper, we will present the design, fabrication, modeling, simulation, and testing results of our manipulation device using electrokinetic force.

Stick-Slip Vibration Between Two Large Concentric Circular Discs in Rotational Contact With Multiple Point Loads

2003 ◽  
Author(s):  
M. Baleri ◽  
F. Sassani ◽  
P. L. Ko
Keyword(s):  
Experimental Results ◽  
Integral Model ◽  
Mathematical Representation ◽  
Multiple Point ◽  
Stick Slip ◽  
System Parameters ◽  
Modeling Simulation ◽  
Contact Loads ◽  
Simulation Results ◽  
Good Agreement

This paper presents a study of the stick-slip frictional phenomenon when large contact areas subjected to uneven contact loads are involved. The objective of the investigation is to gain better understanding of the phenomenon from experimental observations and to develop a mathematical representation that can be used for modeling, simulation and design purposes. A dynamic integral-model has been proposed and simulations have been carried out. The effects of various system parameters on the behavior of the system have been studied experimentally and analytically. The simulation results using the proposed integral-model are in good agreement with the experimental results. The latter also show that stick-slip vibrations can be influenced by the loading conditions.

A Novel Method to Decrease Electric Field and SAR Using an External High Dielectric Sleeve at 3T Head MRI: Numerical and Experimental Results

2013 ◽  
Author(s):  
Bu S. Park ◽  
Joshua W. Guag ◽  
Leonardo M. Angelone ◽  
Sunder S. Rajan
Keyword(s):  
Numerical Simulation ◽  
Electric Field ◽  
Dielectric Materials ◽  
Boundary Region ◽  
Experimental Results ◽  
Head Model ◽  
Rf Coil ◽  
Mri Imaging ◽  
Simulation Results ◽  
High Dielectric

We present experimental and numerical simulation results showing that high dielectric materials (HDMs) located outside of a RF head coil decrease the electric field (E-field, |E|) with minimum change of the RF magnetic field (B1+) at 3T MRI imaging. Compared to previous research using HDMs located between the RF coil and sample, our method locating the HDM outside the coil allowed an increased sample size and more flexibility of HDM thickness optimization. Numerical simulation results showed more than 30% decrease in the local SAR at the boundary region of the head model. Validating experimental results showed a 21% decrease in the maximum |Etotal| using a HDM made of distilled water.

Influence of Icing to the Corona Loss Characteristics of the AC Power Transmission Lines

2013 ◽  
Vol 385-386 ◽  
pp. 1112-1116
Author(s):  
Jun Zhu ◽  
Zi Qiang Xu ◽  
Qing Zhong Geng ◽  
Yun Peng Liu ◽  
Jiang Hai Geng
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Experimental Results ◽  
Power Transmission Lines ◽  
Ac Power ◽  
Test Platform ◽  
Surface Electric Field ◽  
Simulation Results

The transmission line corridor will inevitably cross the icing area in China. Icing will influence the corona characteristics of transmission lines. In order to deeply analyze the influence law of the icing to corona loss characteristics, an icing test platform that can be utilized to simulate icing conditions was built. Icing test was done in the corona cage of 1.8m×1.8m×4m. Through changing the conductivity of freezing water and the length of icicle, corona loss of the icing conductor was measured and the surface electric field was also simulated with the software ANSYS. The results show that the length of icicle is an important factor affecting the corona loss of the AC conductor and the conductivity of freezing water on that impact is not obvious. Owing to the icicles, the distortion of the conductor electric field is serious. With the increase of icicle length, conductor corona loss value increases significantly. When the length of icicle increases to about 18mm, the increase of the corona loss value is no longer obvious trending to be saturated . The simulation results coincided with the experimental results very well.

Design Optimization of 1.2kV 4H-SiC Trench MOSFET

2019 ◽  
Vol 963 ◽  
pp. 605-608
Author(s):  
Tian Dai ◽  
Peter M. Gammon ◽  
Vishal Ajit Shah ◽  
Xiao Deng ◽  
Michael R. Jennings ◽  
...  
Keyword(s):  
Electric Field ◽  
Design Optimization ◽  
Gate Oxide ◽  
High Electric Field ◽  
Fabrication Process ◽  
Experimental Results ◽  
Base Region ◽  
Field Stress

In a trench MOSFET structure, p+ trench bottom implant (also called p+ shielding region) is commonly used to protect the gate oxide from high electric field stress, however, if the design and fabrication process are not optimized properly, the p+ shielding region together with n-drift and the p-base region will form a parasitic JFET which severely degrades the on-state performance of the device. This paper presents this parasitic JFET effect with experimental results and the optimization work that has been done to eliminate the parasitic JFET.

scholarly journals Design and Characterization of a Microwave Planar Sensor for Dielectric Assessment of Vegetable Oils

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1030 ◽  
Author(s):  
Aleksandr Ivanov ◽  
Timur Agliullin ◽  
Dario Laneve ◽  
Vincenza Portosi ◽  
Artem Vorobev ◽  
...  
Keyword(s):  
Dielectric Permittivity ◽  
Electric Field ◽  
Numerical Simulations ◽  
Vegetable Oils ◽  
Experimental Validation ◽  
Experimental Results ◽  
Geometrical Parameters ◽  
Frequency Range ◽  
Simulation Results

We report on the numerical simulations and experimental validation of a microwave planar sensor based on two coupled rings operating in the 4–6 GHz range. The fabricated sensor is used to characterize the dielectric permittivity of vegetable oils. We optimized the geometrical parameters in order to improve the overlap between the oil samples under study and the electric field. The experimental results showed an excellent match with the simulation results. The fabricated sensor allowed to retrieve the oil permittivity with a sensitivity of about 35 MHz per permittivity unit in the frequency range of interest. This paves the way to the realization of compact and sensitive sensors for a wide plethora of fields ranging from industry and food to chemistry and biology.

Study on Charge and Discharge Phenomenon of Lithium Ion Battery under High Electric Field

2020 ◽  
Vol 140 (8) ◽  
pp. 650-655
Author(s):  
Shoki Tsuji ◽  
Yoji Fujita ◽  
Hiroaki Urushibata ◽  
Akihiko Kono ◽  
Ryoichi Hanaoka ◽  
...  
Keyword(s):  
Electric Field ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
High Electric Field

Simulation of carding condensing process

2021 ◽  
pp. 004051752098812
Author(s):  
Xixi Qian ◽  
Yuanying Shen ◽  
Qiaoli Cao ◽  
Jun Ruan ◽  
Chongwen Yu
Keyword(s):  
Experimental Results ◽  
Simulation Results ◽  
Carding Machine ◽  
The Web

A simulation describing the fiber movement during the condensation was conducted, and the effect of the condensation in the carding machine was studied. The simulation results showed that the condensation has the blending and the evening effect on the condensed sliver, which can be explained by the fiber rearrangement. Moreover, the increasing web width and the decreasing condensing length can result in a more uniform sliver. Further, the evening effect of the web width on the web was verified by experiments. The simulation results were in general agreement with the experimental results.

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