Numerical study of coal particle cluster combustion under quiescent conditions

2007 ◽  
Vol 62 (16) ◽  
pp. 4336-4347 ◽  
Author(s):  
Shuyan Wang ◽  
Huilin Lu ◽  
Yunhua Zhao ◽  
Reza Mostofi ◽  
Ho Young Kim ◽  
...  
Keyword(s):  
Coal Particle ◽  
Numerical Study ◽  
Particle Cluster

scholarly journals A New Method for Predicting Erosion Damage of Suddenly Contracted Pipe Impacted by Particle Cluster via CFD-DEM

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1858 ◽  
Author(s):  
Jiarui Cheng ◽  
Yihua Dou ◽  
Ningsheng Zhang ◽  
Zhen Li ◽  
Zhiguo Wang
Keyword(s):  
Erosion Rate ◽  
Numerical Study ◽  
Target Surface ◽  
Impact Angle ◽  
Particle Collision ◽  
Particle Cluster ◽  
Interparticle Collision ◽  
Velocity Decay ◽  
Discrete Element Methods ◽  
The Impact

A numerical study on the erosion of particle clusters in an abrupt pipe was conducted by means of the combined computational fluid dynamics (CFD) and discrete element methods (DEM). Furthermore, a particle-wall extrusion model and a criterion for judging particle collision interference were developed to classify and calculate the erosion rate caused by different interparticle collision mechanisms in a cluster. Meanwhile, a full-scale pipe flow experiment was conducted to confirm the effect of a particle cluster on the erosion rate and to verify the calculated results. The reducing wall was made of super 13Cr stainless steel materials and the round ceramsite as an impact particle was 0.65 mm in diameter and 1850 kg/m3 in density. The results included an erosion depth, particle-wall contact parameters, and a velocity decay rate of colliding particles along the radial direction at the target surface. Subsequently, the effect of interparticle collision mechanisms on particle cluster erosion was discussed. The calculated results demonstrate that collision interference between particles during one cluster impact was more likely to appear on the surface with large particle impact angles. This collision process between the rebounded particles and the following particles not only consumed the kinetic energy but also changed the impact angle of the following particles.

Numerical study of coal particle ignition in air and oxy-atmosphere

2019 ◽  
Vol 37 (3) ◽  
pp. 2867-2874 ◽  
Author(s):  
Sima Farazi ◽  
Antonio Attili ◽  
Seongwon Kang ◽  
Heinz Pitsch
Keyword(s):  
Coal Particle ◽  
Numerical Study ◽  
Particle Ignition

Numerical study of the partial oxidation of a coal particle in steam and dry air atmospheres

2012 ◽  
Vol 77 (1) ◽  
pp. 32-46 ◽  
Author(s):  
M. Kestel ◽  
P. Nikrityuk ◽  
O. Hennig ◽  
C. Hasse
Keyword(s):  
Partial Oxidation ◽  
Coal Particle ◽  
Numerical Study ◽  
Dry Air

A Numerical Study of the Thawing Process of a Frozen Coal Particle

1983 ◽  
Vol 105 (1) ◽  
pp. 197-200 ◽  
Author(s):  
J. F. Raymond ◽  
B. Rubinsky
Keyword(s):  
Coal Particle ◽  
Numerical Study ◽  
Thawing Process

Numerical study of particle cluster flow in risers with cluster-based approach

2005 ◽  
Vol 60 (23) ◽  
pp. 6757-6767 ◽  
Author(s):  
Lu Huilin ◽  
Sun Qiaoqun ◽  
He Yurong ◽  
Sun Yongli ◽  
Jianmin Ding ◽  
...  
Keyword(s):  
Numerical Study ◽  
Particle Cluster ◽  
Cluster Flow

scholarly journals Numerical Study of the Effects of CO 2 Addition in Single Coal Particle Gasification

2017 ◽  
Vol 142 ◽  
pp. 1306-1311 ◽  
Author(s):  
Tata Sutardi ◽  
Manosh C. Paul ◽  
Nader Karimi ◽  
Paul L. Younger
Keyword(s):  
Coal Particle ◽  
Numerical Study

Numerical study of coarse coal particle breakage in pneumatic conveying

Particuology ◽  
2018 ◽  
Vol 38 ◽  
pp. 204-214 ◽  
Author(s):  
Jiawei Zhou ◽  
Yu Liu ◽  
Changlong Du ◽  
Songyong Liu ◽  
Jianping Li
Keyword(s):  
Coal Particle ◽  
Numerical Study ◽  
Particle Breakage ◽  
Pneumatic Conveying
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