scholarly journals Temperature field distribution of coal seam in heat injection

2017 ◽  
Vol 21 (suppl. 1) ◽  
pp. 39-45 ◽  
Author(s):  
Zhizhen Zhang ◽  
Weihong Peng ◽  
Xiaoji Shang ◽  
Kun Wang ◽  
Heng Li ◽  
...  
Keyword(s):  
Coal Seam ◽  
Flow Problem ◽  
Boundary Integral ◽  
Heat Sources ◽  
Natural Boundary ◽  
Temperature Field Distribution ◽  
Temperature Filed ◽  
Natural Boundary Element Method ◽  
Heat Injection ◽  
Steady Heat

In this article, we present a natural boundary element method (NBEM) to solve the steady heat flow problem with heat sources in a coal seam. The boundary integral equation is derived to obtain the temperature filed distribution of the coal seam under the different injecting conditions.

Study of Temperature Field Distribution and Deformation of Chain Link Based on Pro/E

2014 ◽  
Vol 490-491 ◽  
pp. 836-840
Author(s):  
Bing Ma ◽  
Li Zhen Liu ◽  
Xue Feng Bai ◽  
He Wang ◽  
Li Wei Yang ◽  
...  
Keyword(s):  
Temperature Field ◽  
Thermal Conduction ◽  
Heat Recovery ◽  
Maximum Stress ◽  
Hot Forging ◽  
Field Variation ◽  
Temperature Field Distribution ◽  
Chain Link ◽  
Temperature Filed ◽  
Stress And Deformation

This paper studies the temperature field variation of the chain link as well as the stress and deformation distribution of the pin which works in hot forging and stamping production line with heat recovery function. The approach is to build the model of the chain link with Pro/Engineer and apply it to the simulation with Pro/Mechanica. To be specific, it is to stimulate the thermal conduction of the chain link and the stress state of the pin under high temperature with Pro/Mechanica-Thermal and Pro/Mechanica-Structure module, respectively. The results are the temperature filed nephogram of the chain link as well as the stress and deformation nephogram of the pin. The simulation shows that:1) the temperature reaches 420°C at the contacts of the outer and inner plates at 600s, 2) the maximum stress of the pin is 112Mpa at the ends where the pin meets the outer and inner plates,3) the pins max deformation is 0.0159mm at the middle of the pin. Comparing the simulation to the actual temperature at the contacts of the outer and inner plates,which is measured ten times in advance with average of 439°C ,the simulation is favorable. According to the results above, graphite lubrication should be chosen for the chain and the pin can work properly with deformation rate of 0.795. By this way of simulating with Pro/Mechanica, complicated calculations and repeated tests can be reduced largely, meanwhile, useful parameters and mathematical model can also be provided for manufacturing and process control.

On the free-surface flow of very steep forced solitary waves

2013 ◽  
Vol 739 ◽  
pp. 1-21 ◽  
Author(s):  
Stephen L. Wade ◽  
Benjamin J. Binder ◽  
Trent W. Mattner ◽  
James P. Denier
Keyword(s):  
Free Surface ◽  
Solitary Waves ◽  
Flow Problem ◽  
Nonlinear Approximation ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Boundary Integral ◽  
Weakly Nonlinear ◽  
Nonlinear Solutions

AbstractThe free-surface flow of very steep forced and unforced solitary waves is considered. The forcing is due to a distribution of pressure on the free surface. Four types of forced solution are identified which all approach the Stokes-limiting configuration of an included angle of $12{0}^{\circ } $ and a stagnation point at the wave crests. For each type of forced solution the almost-highest wave does not contain the most energy, nor is it the fastest, similar to what has been observed previously in the unforced case. Nonlinear solutions are obtained by deriving and solving numerically a boundary integral equation. A weakly nonlinear approximation to the flow problem helps with the identification and classification of the forced types of solution, and their stability.

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