On the solution of the neutron diffusion kinetic equation in planar geometry free of stiffness with convergence analysis

2019 ◽  
Vol 125 ◽  
pp. 272-282
Author(s):  
Fernanda Tumelero ◽  
Bardo Bodmann ◽  
Marco Túllio Vilhena ◽  
Celso M.F. Lapa
Keyword(s):  
Kinetic Equation ◽  
Convergence Analysis ◽  
Planar Geometry ◽  
Neutron Diffusion ◽  
Diffusion Kinetic

Study on Combustion Characteristics of Impurity Coal Based on TG-DTG-DTA

2012 ◽  
Vol 568 ◽  
pp. 360-363
Author(s):  
Zhan Wen He ◽  
Chuan Cheng Zhang
Keyword(s):  
Kinetic Equation ◽  
Kinetic Parameters ◽  
Heating Rate ◽  
Ignition Temperature ◽  
Combustion Process ◽  
Combustion Characteristics ◽  
Diffusion Kinetic

Abstract.Based on TG-DTG-DTA, combustion characteristics and kinetic parameters of impure coal in the 10 °C / min heating rate were studied. The results showed that with the increase in the proportion of impurities, ignition temperature, burned temperature significantly improved; combustion characteristics of index clearly decreased; combustion process can be described by a diffusion kinetic equation

scholarly journals Formation of Diffusion Layer on Ti-6Al-4V Alloy during Longtime Friction with Al

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1107
Author(s):  
Ruoyu Liu ◽  
Chuanbing Huang ◽  
Lingzhong Du ◽  
Hao Lan ◽  
Shige Fang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Kinetic Equation ◽  
Intermetallic Compound ◽  
Diffusion Layer ◽  
Diffusion Activation Energy ◽  
Diffusion Kinetic ◽  
Diffusion Growth ◽  
Parabolic Law ◽  
Dynamic Index ◽  
Diffusion Activation

Elements’ diffusion between Ti-6Al-4V alloy and Al in the process of sliding was investigated from 400 °C to 600 °C. The results showed that the atoms were diffused at the Ti-6Al-4V/Al interface. When sliding at 400 °C and 500 °C, no intermetallic compound was detected on the surface of Ti-6Al-4V alloy. When sliding at 600 °C, intermetallic TiAl3 was formed and grew on the surface of Ti-6Al-4V alloy. The diffusion thickness of Al atoms on the surface of Ti-6Al-4V alloy increased with increasing time and temperature. The diffusion kinetic equation of Al atoms on the surface of Ti-6Al-4V alloy was successfully established. The diffusion activation energy of Al atoms in the sliding process was calculated to be 28.22 kJ·mol−1 and the dynamic index n was 0.5. The diffusion growth of Al atoms was controlled by normal parabolic law with time.

Convergence analysis of two-node CMFD method for two-group neutron diffusion eigenvalue problem

2015 ◽  
Vol 302 ◽  
pp. 239-250
Author(s):  
Yongjin Jeong ◽  
Jinsu Park ◽  
Hyun Chul Lee ◽  
Deokjung Lee
Keyword(s):  
Eigenvalue Problem ◽  
Convergence Analysis ◽  
Neutron Diffusion

The combined diffusion-kinetic method of solving the kinetic equation

1969 ◽  
Vol 27 (4) ◽  
pp. 1109-1111
Author(s):  
A. V. Voronkov ◽  
V. V. Chuyanov
Keyword(s):  
Kinetic Equation ◽  
Kinetic Method ◽  
Diffusion Kinetic
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