scholarly journals Modeling solid particle transport and air flow around obstacle

2021 ◽  
Author(s):  
S. Valger
Keyword(s):  
Solid Particle ◽  
Particle Transport ◽  
Air Flow

Just Suspended Speed for Solid Particle Transport in TorusReactor

2018 ◽  
pp. 879-885
Author(s):  
Alouache Ali ◽  
Selatnia Ammar ◽  
Halet Farid ◽  
Abdelouhab Lefkir ◽  
Houssem Eddine Sayah ◽  
...  
Keyword(s):  
Solid Particle ◽  
Particle Transport

Solid-particle motion in two-dimensional peristaltic flows

1976 ◽  
Vol 73 (1) ◽  
pp. 77-96 ◽  
Author(s):  
Tin-Kan Hung ◽  
Thomas D. Brown
Keyword(s):  
Reynolds Number ◽  
Solid Particle ◽  
Particle Motion ◽  
Particle Transport ◽  
Particle Displacement ◽  
Two Dimensional ◽  
Single Bolus ◽  
Highly Nonlinear ◽  
Neutrally Buoyant ◽  
Gap Width

Some insight into the mechanism of solid-particle transport by peristalsis is sought experimentally through a two-dimensional model study (§ 2). The peristaltic wave is characterized by a single bolus sweeping by the particle, resulting in oscillatory motion of the particle. Because of fluid-particle interaction and the significant curvature in the wall wave, the peristaltic flow is highly nonlinear and time dependent.For a neutrally buoyant particle propelled along the axis of the channel by a single bolus, the net particle displacement can be either positive or negative. The instantaneous force acting upon the particle and the resultant particle trajectory are sensitive to the Reynolds number of the flow (§ 3 and 4). The net forward movement of the particle increases slightly with the particle size but decreases rapidly as the gap width of the bolus increases. The combined dynamic effects of the gap width and Reynolds number on the particle displacement are studied (§ 5). Changes in both the amplitude and the form of the wave have significant effects on particle motion. A decrease in wave amplitude along with an increase in wave speed may lead to a net retrograde particle motion (§ 6). For a non-neutrally buoyant particle, the gravitational effects on particle transport are modelled according to the ratio of the Froude number to the Reynolds number. The interaction of the particle with the wall for this case is also explored (§ 7).When the centre of the particle is off the longitudinal axis, the particle will undergo rotation as well as translation. Lateral migration of the particle is found to occur in the curvilinear flow region of the bolus, leading to a reduction in the net longitudinal transport (§ 8). The interaction of the curvilinear flow field with the particle is further discussed through comparison of flow patterns around a particle with the corresponding cases without a particle (§ 9).

Solid Particle Transport in Laminar Flow

2015 ◽  
Author(s):  
Tálita Coffler Botti ◽  
Márcio da Silveira Carvalho
Keyword(s):  
Laminar Flow ◽  
Solid Particle ◽  
Particle Transport

Solid particle transport from a trough in a wind tunnel

1989 ◽  
Vol 57 (4) ◽  
pp. 235-240 ◽  
Author(s):  
T. Akiyama ◽  
Y. Miyamoto
Keyword(s):  
Wind Tunnel ◽  
Solid Particle ◽  
Particle Transport

Model parameter fine-tuning and ranking methodology to improve the accuracy of threshold velocity predictions for solid particle transport

2013 ◽  
Vol 110 ◽  
pp. 210-224 ◽  
Author(s):  
F. Byron Soepyan ◽  
Selen Cremaschi ◽  
Cem Sarica ◽  
Hariprasad J. Subramani ◽  
Gene E. Kouba
Keyword(s):  
Solid Particle ◽  
Particle Transport ◽  
Fine Tuning ◽  
Threshold Velocity ◽  
Model Parameter

21013 Study on Solid Particle Transport Using Gas-liquid Two-Phase Flow

2010 ◽  
Vol 2010.16 (0) ◽  
pp. 355-356
Author(s):  
Masaki MOTOHASHI ◽  
Hiroyasu OHTAKE ◽  
Yasuo KOIZUMI
Keyword(s):  
Solid Particle ◽  
Particle Transport ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

Investigation of the regularities of particle motion in a vortex air flow of radius variable in height

2020 ◽  
pp. 92-100
Author(s):  
S. P. Stepanenko ◽  
B. I. Kotov ◽  
R. A. Kalinichenko
Keyword(s):  
Flow Velocity ◽  
Solid Particle ◽  
Particle Motion ◽  
Equations Of Motion ◽  
Air Flow ◽  
Tangential Direction ◽  
Uniform Field ◽  
Fractionation Process ◽  
Conical Channel ◽  
Air Flow Velocity

Annotation Purpose. Improving the mathematical description of the motion of a solid particle in a vortex air flow for the case of changing the radius of twisting of the flow in the main direction. Methods. The specificity of the question under consideration determines the analytical method of research based on the compilation and analysis of the equations of motion of the particle, in the form of a sphere in the vortex air flow of a conical channel with uneven distribution of air flow velocity over height. Results. The motion of a solid particle in the air in the middle of a conical air-permeable surface is considered; air is sucked through the lateral surface of the cone with louver slits (holes) in the tangential direction, under the action of artificially created forces of the vortex air flow there is an effective intensification of grain fractionation. The obtained equation of particle motion under the action of vortex air flow allows to determine the dependence of material velocity in the grain material layer on a number of factors: geometric parameters of the separator, material feed angle, initial kinematic mode of the material and particle vitality coefficient. Conclusions. Based on the analysis of the force interaction of a particle of grain material with a vortex air flow, an improved mathematical model of particle motion in a non-uniform field of air flow velocity in a conical channel is obtained. Keywords: variable air velocity, trajectory, stability of forces, fractions, vortex air flow, fractionation process, grain mixture.

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