Dynamic properties and third order diffusion coefficients of ions in electrostatic fields

1997 ◽  
Vol 106 (17) ◽  
pp. 7117-7123 ◽  
Author(s):  
Andreas D. Koutselos
Keyword(s):  
Diffusion Coefficients ◽  
Dynamic Properties ◽  
Third Order ◽  
Electrostatic Fields

scholarly journals Influence on ferric chloride aqueous solution caused by external electrostatic field: a molecular dynamics simulation study

RSC Advances ◽  
2018 ◽  
Vol 8 (68) ◽  
pp. 38706-38714 ◽  
Author(s):  
Shi Zhibo ◽  
Li Liyi ◽  
Han Yong ◽  
Bai Jie
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solution ◽  
Molecular Dynamics Simulation ◽  
Ferric Chloride ◽  
Electrostatic Field ◽  
Simulation Study ◽  
Dynamic Properties ◽  
Md Simulations ◽  
Dynamics Simulation ◽  
Electrostatic Fields

A detailed analysis of structural properties and dynamic properties of ferric chloride aqueous solution under external electrostatic fields with different intensities was performed by molecular dynamics (MD) simulations.

Collective Dynamics of Arrays of Micro Cantilevers Interacting Through Fringing Electrostatic Fields

2014 ◽  
Author(s):  
Slava Krylov ◽  
Stella Lulinsky ◽  
Bojan R. Ilic ◽  
Inbar Schneider
Keyword(s):  
Dynamic Properties ◽  
Electrostatic Force ◽  
Three Dimensional ◽  
Nonlinear Behavior ◽  
Silicon On Insulator ◽  
Element Analysis ◽  
Mechanical Coupling ◽  
Electrostatic Fields ◽  
Voltage Dependent ◽  
Electrostatic Coupling

We investigate the collective nonlinear behavior of an array of micro cantilevers interacting by fringing electrostatic fields and fabricated of silicon on insulator (SOI) wafer. The interaction is due to the mechanical coupling originated in the flexibility of the anchor and of the electrostatic coupling through voltage-dependent electrostatic force. In the framework of the reduced order model based on the Galerkin decomposition the array is considered as an assembly of single degree of freedom oscillators. The mechanical coupling matrix is extracted using the full scale finite element analysis of the array while the electrostatic force is approximated by a fit build using the three-dimensional numerical simulation. We show numerically and experimentally that large amplitude collective vibrations of the array can be achieved using parametric excitation while the dynamic properties of the array can be efficiently tuned by the applied voltage.

scholarly journals The Effect of Inelastic Collisions on Diffusion Coefficients for Electron Swarms

1977 ◽  
Vol 30 (3) ◽  
pp. 303 ◽  
Author(s):  
JLA Francey ◽  
DA Jones
Keyword(s):  
Momentum Transfer ◽  
Energy Dependence ◽  
Cross Sections ◽  
Diffusion Coefficients ◽  
Lateral Diffusion ◽  
Inelastic Collisions ◽  
Electrostatic Fields

The effect of inelastic collisions on the ratio of the longitudinal to lateral diffusion coefficients for electrons in electrostatic fields in gases is investigated for several different momentum transfer cross sections. The effect of varying both the strength of the inelastic effects and their energy dependence is examined and the results are used to discuss some of the DL/f.l data of Wagner et al. (1967).

The Investigation of Temperature Effect on Dynamic Characteristics of Rubber Isolator

2011 ◽  
Vol 138-139 ◽  
pp. 575-580
Author(s):  
De Bao Han
Keyword(s):  
Interpolation Method ◽  
Dynamic Properties ◽  
Low Frequency ◽  
Model Parameters ◽  
Force Model ◽  
Third Order ◽  
Restoring Force ◽  
First Order ◽  
The Third ◽  
Rubber Isolator

This article focuses on the temperature dependent dynamic properties of rubber isolator. First, a set of experimental device was designed to conduct the experimental investigation. Then, a polynomial model of hysteretic used as an isolator restoring force model was proposed and the model parameters were identified using the displacement-restoring force loop from experiment by the optimal least-squares arithmetic. Finally, the Hermite interpolation method was utilized to add the number of identified parameters, such that curvatures that represent the first order stiffness, the third order stiffness and damping varied with frequency, amplitude under different temperature were obtained. The analysis results indicated that the first order stiffness varies weakly with the temperature increasing, and there is an area of the first order stiffness varied drastically. The third order stiffness have a strong nonlinear area within the low frequency and little amplitude, the third order stiffness magnitude increases with the temperature increasing firstly, then decreases while the temperature over 50°C. There is a sensitive area as the amplitude less than 1.5mm, the damping decreases rapidly with the augmenting of vibration amplitude, and the rate of decreasing is less gradually with the temperature rising.

scholarly journals Anisotropic Diffusion in Electron Swarms

1975 ◽  
Vol 28 (5) ◽  
pp. 533 ◽  
Author(s):  
JLA Francey ◽  
DA Jones
Keyword(s):  
Free Path ◽  
Diffusion Coefficients ◽  
Anisotropic Diffusion ◽  
Collision Frequency ◽  
Mean Free Path ◽  
Distribution Functions ◽  
Isotropic Diffusion ◽  
Electrostatic Fields ◽  
Frequency Interaction

We show that the distribution functions derived by Parker (1963) in his analysis of the TownsendHuxley experiment can be used to calculate DL/D, the ratio of longitudinal to isotropic diffusion coefficients for electron swarms in electrostatic fields in gases. In the case of a constant collision frequency interaction our results agree with previous calculations, whilst for a constant mean free path we find DL/D = 0�58. This result is some 16% higher than previously published values but provides better agreement with experiment for electrons in helium.

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