scholarly journals Research on fine particle separation in rotational flow field.

1995 ◽  
Vol 32 (10) ◽  
pp. 759-761
Author(s):  
Tadashi FUYUKI
Keyword(s):  
Flow Field ◽  
Fine Particle ◽  
Particle Separation ◽  
Rotational Flow

Numerical Simulation of Powder Dispersion Performance by Different Mesh Types

2016 ◽  
Vol 680 ◽  
pp. 82-85
Author(s):  
Jian Cai ◽  
Lan Chen ◽  
Umezuruike Linus Opara
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Fine Particle ◽  
Particle Deposition ◽  
Tetrahedral Mesh ◽  
Computational Time ◽  
Kinetic Characteristics ◽  
Powder Dispersion ◽  
Simulation Results ◽  
Time Accuracy

OBJECTIVE To investigate the influence of mesh type on numerical simulating the dispersion performance of micro-powders through a home-made tube. METHODS With the computational fluid dynamics (CFD) method, a powder dispersion tube was meshed in three different types, namely, tetrahedral, unstructured hexahedral and prismatic-tetrahedral hybrid meshes. The inner flow field and the kinetic characteristics of the particles were investigated. Results of the numerical simulation were compared with literature evidences. RESULTS The results showed that using tetrahedral mesh had the highest computational efficiency, while employing the unstructured hexahedral mesh obtained more accurate outlet velocity. The simulation results of the inner flow field and the kinetic characteristics of the particles were slightly different among the three mesh types. The calculated particle velocity using the tetrahedral mesh had the best correlation with the changing trend of the fine particle mass in the first 4 stages of the new generation impactor (NGI) (R2 = 0.91 and 0.89 for powder A and B, respectively). Conclusions Mesh type affected computational time, accuracy of simulation results and the prediction abilities of fine particle deposition.

Effects of fine particle outlet on performance and flow field of a centrifugal air classifier

2017 ◽  
Vol 117 ◽  
pp. 139-148 ◽  
Author(s):  
Zhanpeng Sun ◽  
Guogang Sun ◽  
Xiaonan Yang ◽  
Yi Yuan ◽  
Qinglian Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
Fine Particle ◽  
Air Classifier

Lattice Boltzmann Model in Rotational Flow Field

2002 ◽  
Vol 45 (2) ◽  
pp. 164-170 ◽  
Author(s):  
Shi-De FENG ◽  
Ying ZHAO ◽  
Michihisa TSUTAHARA ◽  
LUO De-Hai
Keyword(s):  
Flow Field ◽  
Lattice Boltzmann ◽  
Lattice Boltzmann Model ◽  
Rotational Flow ◽  
Boltzmann Model

Cyclic Flow Experiments of a Fine Particle Separation Hydrocyclone

2007 ◽  
Author(s):  
Lixin Zhao ◽  
Minghu Jiang
Keyword(s):  
Flow Condition ◽  
Fine Particle ◽  
Fine Particles ◽  
Separation Efficiency ◽  
Amplitude Ratio ◽  
Particle Separation ◽  
Separation Performance ◽  
Period Ratio ◽  
Cyclic Flow ◽  
Signal Type

Basic separating principle of hydrocyclones and the cyclic experimental research facilities are introduced. The difficulty of separating fine particle is described. Based on a solid-liquid hydrocyclone used for separating fine particles, effect of cyclic flow condition on hydrocyclone’s performance is studied. Effects of cyclic period ratio, cyclic flowrate amplitude ratio, Reynolds number, gas liquid ratio, and the cyclical signal type on the hydrocyclone’s fine particle separation performance, especially on relative overflow purifying rate were studied in detail. The results show that the separation efficiency of the hydrocyclone operated under cyclic flow condition can be higher than that in steady condition, when the cyclic period ratio is about 0.68 and the cyclic flowrate amplitude ratio is about 2%. Rectangular wave seems to be the best cyclic signal for enhancing the hydrocyclone’s separation efficiency. The cyclical change of flowrate leads to the increasing of hydrocyclone’s energy consumption to some extent, while the increasing amount is very less, which is no more than 3% in general.

107 Application of digital holography in behavior measurement of fine particle in flow field(2)

2006 ◽  
Vol 2006 (0) ◽  
pp. _107-1_-_107-4_
Author(s):  
Hideki TOMIOKA ◽  
Hiroyuki HIRAHARA ◽  
Masaaki KAWAHASHI
Keyword(s):  
Flow Field ◽  
Fine Particle ◽  
Digital Holography
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