scholarly journals Simulation of Bouncing Solid Particle in Oil: Spherical vs. Polyhedral Particle Shape Effect

2021 ◽  
Author(s):  
Fatemeh Razavi ◽  
Alexandra Komrakova ◽  
Carlos F. Lange
Keyword(s):  
Solid Particle ◽  
Particle Shape ◽  
Shape Effect ◽  
Particle Shape Effect ◽  
Polyhedral Particle

scholarly journals Particle-Based Numerical Simulation Study of Solid Particle Erosion of Ductile Materials Leading to an Erosion Model, Including the Particle Shape Effect

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 286
Author(s):  
Shoya Mohseni-Mofidi ◽  
Eric Drescher ◽  
Harald Kruggel-Emden ◽  
Matthias Teschner ◽  
Claas Bierwisch
Keyword(s):  
Solid Particle ◽  
Particle Shape ◽  
Solid Particles ◽  
Solid Particle Erosion ◽  
Shape Effect ◽  
Particle Erosion ◽  
Erosion Model ◽  
Ductile Materials ◽  
Erosion Behavior ◽  
Numerical Predictions

Solid particle erosion inevitably occurs if a gas–solid or liquid–solid mixture is in contact with a surface, e.g., in pneumatic conveyors. Having a good understanding of this complex phenomenon enables one to reduce the maintenance costs in several industrial applications by designing components that have longer lifetimes. In this paper, we propose a methodology to numerically investigate erosion behavior of ductile materials. We employ smoothed particle hydrodynamics that can easily deal with large deformations and fractures as a truly meshless method. In addition, a new contact model was developed in order to robustly handle contacts around sharp corners of the solid particles. The numerical predictions of erosion are compared with experiments for stainless steel AISI 304, showing that we are able to properly predict the erosion behavior as a function of impact angle. We present a powerful tool to conveniently study the effect of important parameters, such as solid particle shapes, which are not simple to study in experiments. Using the methodology, we study the effect of a solid particle shape and conclude that, in addition to angularity, aspect ratio also plays an important role by increasing the probability of the solid particles to rotate after impact. Finally, we are able to extend a widely used erosion model by a term that considers a solid particle shape.

Exploration of particle shape effect on Cu-H2O nanoparticles over a moving plate

2019 ◽  
Vol 30 (4) ◽  
pp. 1867-1879 ◽  
Author(s):  
Ganesh Kumar K. ◽  
Chamkha Ali J. ◽  
Prasannakumara B.C. ◽  
Jyothi A.M.
Keyword(s):  
Heat Transfer ◽  
Particle Shape ◽  
Nonlinear Thermal Radiation ◽  
Shape Effect ◽  
Moving Plate ◽  
Content Type ◽  
Opposite Trend ◽  
Thermodynamic Performance ◽  
Particle Shape Effect ◽  
Nanoparticle Shapes

Purpose This paper aims to explore particle shape effect on Cu-H2O nanoparticles over a moving plate in the presence of nonlinear thermal radiation. To characterize the effect, particle shape and viscous dissipation are considered. Convergent solutions for the resulting nonlinear systems are derived and the effects of embedded parameters of interest on velocity and temperature field are examined. Design/methodology/approach The Runge–Kutta–Fehlberg fourth-fifth order method along with shooting technique is used to solve the governing equations (6) and (7) with boundary conditions (8). A suitable finite value of η∞ is considered in such a way that the boundary conditions are satisfied asymptotically. Findings The results show an increase in both the heat transfer and thermodynamic performance of the system. However, among the three nanoparticle shapes, disk shape exhibited better heat transfer characteristics and heat transfer rate. On the other hand, the velocity profile enhances with increasing values of ϕ in the first solution, but the opposite trend was found in the second solution. Originality/value The present paper deals with an exploration of particle shape effect on Cu-H2O nanoparticles over a moving plate in the presence of nonlinear thermal radiation. To characterize the effect, particle shape and viscous dissipation are considered. Convergent solutions for the resulting nonlinear systems are derived and the effects of embedded parameters of interest on velocity and temperature field are examined. The skin friction coefficient and Nusselt number are numerically tabulated and discussed. The results show an increase in both heat transfer and thermodynamic performance of the system. However, among the three nanoparticle shapes, disk shape exhibited better heat-transfer characteristics and heat-transfer rate. On the other hand, the velocity profile enhances with increasing values of ϕ in the first solution, but the opposite trend was found in the second solution.

Particle shape effect on hydrodynamics and heat transfer in spouted bed: A CFD–DEM study

Particuology ◽  
2021 ◽  
Author(s):  
Dianyu E ◽  
Peng Zhou ◽  
Suya Guo ◽  
Jia Zeng ◽  
Jiaxin Cui ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Particle Shape ◽  
Shape Effect ◽  
Spouted Bed ◽  
Particle Shape Effect

Particle shape effect on thermal conductivity and shear wave velocity in sands

2017 ◽  
Vol 12 (3) ◽  
pp. 615-625 ◽  
Author(s):  
Changho Lee ◽  
Hyoung Suk Suh ◽  
Boyeong Yoon ◽  
Tae Sup Yun
Keyword(s):  
Thermal Conductivity ◽  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Particle Shape ◽  
Shape Effect ◽  
Particle Shape Effect
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