The Modern Information Technologies and Visualization Methods for Analysis of Computer Simulation Results for Complex Plasma

2014 ◽  
Vol 15 (4) ◽  
pp. 981-995 ◽  
Author(s):  
T. S. Ramazanov ◽  
S. K. Kodanova ◽  
M. K. Issanova ◽  
N. Kh. Bastykova ◽  
Zh. A. Moldabekov
Keyword(s):  
Software Package ◽  
Information Technologies ◽  
Simulation Method ◽  
Rapid Analysis ◽  
Dynamics Simulation ◽  
Complex Plasma ◽  
Simulation Results ◽  
Modern Information ◽  
Complex Plasmas ◽  
Equations Of Motions

AbstractIn this paper we present a software package based on modern information technologies that allows rapid analysis and visualization of the properties of complex plasmas. The properties of plasma are simulated by two means. First of all, we have applied the molecular dynamics simulation method which numerically solves the equations of motions for plasma particles. Secondly, we calculate microscopic properties of plasma by using the Boltzmann equation with additional relations, initial and boundary conditions.

Molecular Dynamics Simulations of Nanocomposite Diamond-Like Carbon

2005 ◽  
Author(s):  
G. T. Gao ◽  
J. D. Schall ◽  
K. Van Workum ◽  
P. T. Mikulski ◽  
J. A. Harrison
Keyword(s):  
Molecular Dynamics ◽  
Elastic Constants ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Diamond Structure ◽  
The Core ◽  
Constant Tension ◽  
Simulation Results ◽  
Dynamics Simulations ◽  
Carbon Network

A constant tension and constant temperature molecular dynamics simulation method was used in the calculations of the elastic constants of the nanocomposite systems. The nanocomposite systems contain a core of sp3 diamond structure surrounded by an amorphous carbon network. The simulation results show that the elastic properties of nanocomposites of diamond-like carbons are closely related to the size of the sp3 diamond core; the bigger the core, the larger the elastic constants, and the system becomes more anisotropic.

scholarly journals Estimation of the critical vitrification rate of pure metals using molecular dynamics simulation

2019 ◽  
Vol 486 (2) ◽  
pp. 168-172
Author(s):  
S. A. Rogachev ◽  
A. S. Rogachev ◽  
M. I. Alymov
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Cooling Rates ◽  
Long Term Stability ◽  
Simulation Results ◽  
Pure Metals ◽  
Range Of Values

A molecular dynamics simulation method was applied for estimation of critical cooling rates (vc) that required for amorphization of pure metals: Mg, Al, Ti, Fe, Co, Ni, Cu, Zr, Mo, Pd, Ag, Ta, W, Pt, Au, and Pb. The range of values vc was found to be from 7.9 × 1011 K/s for Al to 3.8 × 1013 K/s for Zr. The atomic structure obtained at different cooling rates is described. A dependence of the specific volume on temperature was investigated both during the amorphization and crystallization processes. The modelling shows, which metals have the highest temperature range of long-term stability of the amorphous phase (Fe, Mo, Ta, W). Estimates were given for the maximum radius of a melt drop that can be cooled at a rate of vc. The obtained simulation results were compared with available experimental data.

Dynamics Simulation of Automatic Rifle

2012 ◽  
Vol 482-484 ◽  
pp. 1547-1550
Author(s):  
Shan Lu ◽  
Bao Hua Wang ◽  
Ya Ping Qi
Keyword(s):  
Firing Rate ◽  
Dynamic Simulation ◽  
Simulation Method ◽  
Airway Device ◽  
Dynamics Simulation ◽  
Structure Parameters ◽  
High Firing Rate ◽  
Return Spring ◽  
Simulation Results ◽  
High Firing

By using dynamic simulation method, the launching technique of high firing rate for automatic rifle was studied. The influence of structure parameters of airway device, the stiffness of buffer spring and return spring on firing rate was studied. The simulation results provide the reference for the designing of high firing rate automatic rifle.

scholarly journals Investigation on Cf/PyC Interfacial Properties of C/C Composites by the Molecular Dynamics Simulation Method

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 679
Author(s):  
Yuan Zhou ◽  
Tianyuan Ye ◽  
Long Ma ◽  
Zixing Lu ◽  
Zhenyu Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Md Simulation ◽  
Average Length ◽  
Tensile Load ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Force Model ◽  
Element Analysis ◽  
Simulation Results

In this paper, a molecular dynamics (MD) simulation model of carbon-fiber/pyrolytic-carbon (Cf/PyC) interphase in carbon/carbon (C/C) composites manufactured by the chemical vapor phase infiltration (CVI) process was established based on microscopic observation results. By using the MD simulation method, the mechanical properties of the Cf/PyC interphase under tangential shear and a normal tensile load were studied, respectively. Meanwhile, the deformation and failure mechanisms of the interphase were investigated with different sizes of the average length L ¯ a of fiber surface sheets. The empirical formula of the interfacial modulus and strength with the change of L ¯ a was obtained as well. The shear properties of the isotropic pyrolysis carbon (IPyC) matrix were also presented by MD simulation. Finally, the mechanical properties obtained by the MD simulation were substituted into the cohesive force model, and a fiber ejection test of the C/C composite was simulated by the finite element analysis (FEA) method. The simulation results were in good agreement with the experimental ones. The MD simulation results show that the shear performance of the Cf/PyC interphase is relatively higher when L ¯ a is small due to the effects of non-in-plane shear, the barrier between crystals, and long sheet folding. On the other hand, the size of L ¯ a has no obvious influence on the interfacial normal tensile mechanical properties.

scholarly journals Dynamics Simulation of Stirling Engine for Solar Energy Based on the Time-Varying Support Stiffness

2014 ◽  
Vol 8 (1) ◽  
pp. 710-715
Author(s):  
Junzhou Huo ◽  
Hanyang Wu ◽  
Jing Chen
Keyword(s):  
Damping Ratio ◽  
Simulation Method ◽  
Stirling Engine ◽  
Output Shaft ◽  
Dynamics Simulation ◽  
Time Varying ◽  
Vibration Displacement ◽  
Constant Stiffness ◽  
Simulation Results ◽  
Stiffness And Damping

In order to simulate the Stirling engine more easily, the stiffness and damping ratio of the crankshaft bearing are assumed to be steady-state in the research before, but this assumption is contrary to the real condition. Therefore, in this paper, a time-varying stiffness and damping ratio of the crankshaft bearing simulation method has been proposed. Compared with the simulation results of the crankshaft bearings with constant stiffness, the speed fluctuation coefficient of output shaft and crankshaft in time-varying stiffness model is increased by 10%, 24.6% and 13.7%; the vibration displacement of the center mass of output shaft is decreased by 3.0%; the average dynamic load on airframe is increased by 47.9%. From the simulation results, it is found that the time-varying stiffness and damping ratio of the crankshaft bearing is significant to the characteristics of the Stirling engine dynamic response.

Dynamics Simulation of Microbubbles in Ultrasonic Wave Field Considering the Secondary Bjerknes Force

2010 ◽  
Vol 459 ◽  
pp. 271-276
Author(s):  
Takashi Miwa ◽  
Yoshiki Yamakoshi
Keyword(s):  
Laminar Flow ◽  
Wave Field ◽  
Ultrasonic Wave ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Experimental Result ◽  
Sweep Method ◽  
Bubble Interaction ◽  
Bjerknes Force ◽  
Simulation Results

In order to control a large number of microbubbles with a pumping ultrasonic wave, it is essential to consider a bubble-to-bubble interaction. This paper proposes a simplified microbubble dynamics simulation method considered with bubble-to-bubble interaction in ultrasonic wave field. The microbubble dynamics is solved with difference method based on the Stokes’s low and the secondary Bjerknes force between microbubbles. The laminar flow is considered in the cylindrical calculation region. The effectiveness of the frequency sweep method in laminar flow is shown with simulation results. And a usefulness of this dynamics simulation is also discussed through the experimental result.

A Study on Surface Friction on Gold Substrate With 2D Molecular Dynamics Simulation

2008 ◽  
Author(s):  
Hualong Yu ◽  
Q. Jane Wang
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Md Simulation ◽  
Surface Friction ◽  
Gold Surface ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Two Dimensional ◽  
Gold Substrate ◽  
Simulation Results

This paper reports a study on the contact and friction between a gold surface and a rigid tip with a two-dimensional (2D) classical Molecular Dynamics (MD) simulation method. A multiscale method is used in the MD simulation. The MD simulation results are compared with the Hertzian cylindrical contact results. A criterion for the transition from surface sliding to surface scratching is also discussed with the assistance of stress analyses.

CONTENT OF TEACHING THE ELEMENTS OF ARTIFICIAL INTELLIGENCE IN A SCHOOL INFORMATICS COURSE

2020 ◽  
pp. 3-10
Author(s):  
I. V. Levchenko
Keyword(s):  
Artificial Intelligence ◽  
General Education ◽  
Extracurricular Activities ◽  
Information Technologies ◽  
Learning Experience ◽  
9Th Grade ◽  
Modern Information ◽  
Further Development ◽  
Form Variant ◽  
Theoretical Foundations

The article considers the feasibility of integrating artificial intelligence technologies into school education and identifies a problem in identifying didactic elements in the field of artificial intelligence, which must be mastered in a school informatics course. The purpose of the article is to propose variant of the content of teaching the elements of artificial intelligence for the general education of schoolchildren as part of the curricular and extracurricular activities in informatics. An analysis of the psychological, pedagogical and scientific-methodical literature in the field of artificial intelligence made it possible to identify the appropriateness of teaching schoolchildren the elements of artificial intelligence in the framework of a comprehensive informatics course, as the theoretical foundations of modern information technologies. Summarizing and systematizing the learning experience of schoolchildren in the field of artificial intelligence made it possible to form variant of the content of teaching the elements of artificial intelligence, which can be implemented in a compulsory informatics course for 9th grade, as well as in elective classes. The results of the study are the theoretical basis for the further development of the components of the methodological system of teaching the elements of artificial intelligence in a school informatics course. The research materials may be useful to specialists in the field of teaching informatics and to informatics teachers.

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