scholarly journals A Kind of Coating Method of GaN-MOCVD Graphite Susceptor

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Xiao-feng Wu ◽  
Shi-gang Hu ◽  
Hai-ou Li ◽  
Jin Li ◽  
Zai-fang Xi ◽  
...  
Keyword(s):  
Film Growth ◽  
Comsol Multiphysics ◽  
Temperature Uniformity ◽  
Analysis Software ◽  
Element Analysis ◽  
Heating Efficiency ◽  
Coating Method ◽  
The Common ◽  
High Emissivity ◽  
Graphite Susceptor

A novel coating method for the GaN-MOCVD graphite susceptor is proposed in the paper, which means that the upper surface and sides of the graphite susceptor are covered with a low emissivity material coating, and the surface under the susceptor is covered with a high emissivity SiC coating. By using finite element analysis software COMSOL Multiphysics, the temperature field of the susceptors without coating, with common SiC coating, and with improved coating is obtained and compared, which shows that the susceptor with the improved coating not only increases the heating efficiency of the heater, but also improves the temperature uniformity of the substrate, which can be of great benefit to the film growth. In addition, this improved coating for the susceptor has the same heating sensitivity as the common SiC coating.

Numerical Simulation of PC Steel Bar Induction Heating Process

2011 ◽  
Vol 228-229 ◽  
pp. 270-275
Author(s):  
Qian Zhe Zhao ◽  
Yi Bing Liu ◽  
Yan Ping Liu ◽  
Wei Song Zhou
Keyword(s):  
Numerical Simulation ◽  
Induction Heating ◽  
Active Power ◽  
Experimental Fact ◽  
Heating Process ◽  
Temperature Uniformity ◽  
Element Analysis ◽  
Heating Efficiency ◽  
Steel Bar ◽  
Main Factors

Based on electromagnetic and temperature field models of nonlinear ferromagnetic materials, this paper conducts a finite element analysis of the induction heating process of PC steel bar, thus obtaining the change curves of temperature, active power, heating efficiency and power density. The main factors and mechanisms affecting the heating efficiency and the temperature uniformity are analyzed systematically by a combination of the simulation result and the experimental fact. This work is expected to contribute significantly for optimizing the key parameters of induction heating production of PC steel bar.

Simulation of Temperature Distribution in Current Transformers with Current Flow

2013 ◽  
Vol 313-314 ◽  
pp. 882-886 ◽  
Author(s):  
Zhen Hua Yan ◽  
Xiang Ren ◽  
Hang Ren ◽  
Wei Dong Ding
Keyword(s):  
Finite Element Analysis ◽  
Temperature Distribution ◽  
Current Flow ◽  
Maximum Temperature ◽  
Comsol Multiphysics ◽  
Analysis Software ◽  
Current Transformers ◽  
Maximum Temperature Difference ◽  
Element Analysis ◽  
Ambient Temperatures

On-site experience suggests the possibility of condensation of the moisture in Current transformers (CTs) which is impossible theoretically if temperature distribution in the CT is uniform. In order to study the temperature distribution in a typical CT, finite element analysis software (COMSOL Multiphysics) is used to obtain the temperature distribution of the outer surface and inside of SF6 in CT in different ambient temperatures (20 °C to-10 °C). Besides, experiments are conducted to obtain the temperature of different positions on the CT surface that correspond to conductor, shell, spacer and porcelain bushing that are inside the CT with different ambient temperature. Both simulation and experiments show that temperature distribution in the CT is non-uniform, and the closer the part is to the conductor, the higher the temperature. Furthermore, maximum temperature difference remains about 35 °C in both simulation and experiments with different ambient temperatures from 20 °C to-10 °C.

Temperature and Stress Fields of Reactive Powder Concrete under High Temperature

2012 ◽  
Vol 174-177 ◽  
pp. 1193-1198
Author(s):  
Jin Hui Liu ◽  
Hong Bin Liu ◽  
Yang Ju ◽  
Kai Pei Tian ◽  
Li Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Stress Distribution ◽  
Stress Fields ◽  
Comsol Multiphysics ◽  
Reactive Powder Concrete ◽  
Analysis Software ◽  
Element Analysis ◽  
Reactive Powder ◽  
Variation Rule ◽  
Good Agreement

The temperature and stress fields of reactive powder concrete under high temperature are investigated using finite element analysis software COMSOL MULTIPHYSICS. In this simulation, the influence of variation of thermal parameters with temperature on the temperature and stress distribution is taken into account. The temperature and stress distribution are obtained. And the variation rule of numerical results shows very good agreement with the experimental data.

Dynamic Analysis of DVG 850 High-Speed Machining Center

2012 ◽  
Vol 487 ◽  
pp. 203-207
Author(s):  
Gong Xue Zhang ◽  
Xiao Kai Shen
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Response Analysis ◽  
Improved Method ◽  
Analysis Software ◽  
Element Analysis ◽  
Harmonic Response ◽  
Machining Center ◽  
Calculation Results ◽  
Harmonic Response Analysis

Purpose, with the application of workbench finite element analysis software, get the analysis results of DVG 850 high-speed vertical machining center via the modal analysis and harmonic response analysis. Use the calculation results for reference, put forward the improved method, and prove the credibility of the simulation analysis by testing DVG 850 prototype.

scholarly journals Effect of magnetic field on nanofluid free convection in Conical Partially Annular Space

2020 ◽  
Vol 330 ◽  
pp. 01005
Author(s):  
Abderrahmane AISSA ◽  
Mohamed Amine MEDEBBER ◽  
Khaled Al-Farhany ◽  
Mohammed SAHNOUN ◽  
Ali Khaleel Kareem ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hartmann Number ◽  
Volume Fraction ◽  
Boussinesq Approximation ◽  
Simulation Software ◽  
Comsol Multiphysics ◽  
Governing Equations ◽  
Element Analysis ◽  
Vertical Side ◽  
Side Walls

Natural convection of a magneto hydrodynamic nanofluid in a porous cavity in the presence of a magnetic field is investigated. The two vertical side walls are held isothermally at temperatures Th and Tc, while the horizontal walls of the outer cone are adiabatic. The governing equations obtained with the Boussinesq approximation are solved using Comsol Multiphysics finite element analysis and simulation software. Impact of Rayleigh number (Ra), Hartmann number (Ha) and nanofluid volume fraction (ϕ) are depicted. Results indicated that temperature gradient increases considerably with enhance of Ra and ϕ but it reduces with increases of Ha.

Design Research of Steel Pipe Combination of Angle Steel Tower of XiYue 220kV Cross Section

2013 ◽  
Vol 470 ◽  
pp. 408-411 ◽  
Author(s):  
Yan Zhong Ju ◽  
Xiao Xu Fu ◽  
Neng Xian Zeng
Keyword(s):  
Finite Element Analysis ◽  
Cross Section ◽  
Design Research ◽  
Axial Stress ◽  
Steel Pipe ◽  
Stress Difference ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Angle Steel

Given the path situation of Xiyue substation 220kV four outlets project crossing Shunde waterway section,this article applies of Dao Heng tower full stress analysis software and the finite element analysis software ANSYS to two steel pipe combination of angle steel towers to carry on design research,contrast axial stress of two kinds of software,analyse the reasons of axial stress difference.

ANSYS Simply Supported Deep Beams Based on the Study of Mechanical Properties

2013 ◽  
Vol 351-352 ◽  
pp. 782-785
Author(s):  
Yong Bing Liu ◽  
Xiao Zhong Zhang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Mechanical Model ◽  
Work Performance ◽  
Deep Beam ◽  
Analysis Software ◽  
Deep Beams ◽  
Element Analysis ◽  
Simply Supported ◽  
Force Characteristics

Established the mechanical model of simply supported deep beam, calculation and analysis of simple supported deep beams by using finite element analysis software ANSYS, simulated the force characteristics and work performance of the deep beam. Provides the reference for the design and construction of deep beams.

Sign in / Sign up

Export Citation Format

Share Document