A new collision model for ellipsoidal particles in shear flow

Saini, Nadish; Kleinstreuer, Clement

doi:10.1016/j.jcp.2018.09.039

Cited by 11 publications

(3 citation statements)

References 47 publications

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“…A simplified model for non-spherical particles, where collision forces are applied only through a spring, was presented in Mohaghegh and Udaykumar (2017). Saini and Kleinstreuer (2019) recently used a non-linear springdashpot-slider system without any lubrication model to simulate the collision between two ellipsoids in shear flow. While there is not much literature related to the collision model for ellipsoids in viscous fluid, the granular flow and the computer graphics communities have been working on collisions between ellipsoids in dry environment since more than a decade (Guendelman et al, 2003;Tonge et al, 2012;Buist et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

A collision model for DNS with ellipsoidal particles in viscous fluid

Jain

Tschisgale

Fröhlich

2019

International Journal of Multiphase Flow

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Section: Introductionmentioning

confidence: 99%

A collision model for DNS with ellipsoidal particles in viscous fluid

Jain

Tschisgale

Fröhlich

2019

International Journal of Multiphase Flow

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“…(4) Ellipsoid model Related scholars have proposed algorithms for inter-particle collision detection for ellipsoidal particles. The ellipsoid equation method was used to directly model ellipsoidal particles [26][27][28]. Soybean particles can be approximated as ellipsoidal shapes, and whether an ellipsoid model of soybean particles can be directly established is related to the findings presented in the following studies.…”

Section: Geometric Modelmentioning

confidence: 99%

A Review of the Application of Discrete Element Method in Agricultural Engineering: A Case Study of Soybean

Yan

Wang

et al. 2022

Processes

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The discrete element method has become a common method for analyzing the contact interaction between particulate materials and between particles and mechanical components. It has been widely used in agricultural engineering and other fields. Taking soybean as an example, soybean seed particles always have contact effects between particles and mechanical components in the process of planting, harvesting, threshing, separation, cleaning, and processing. The discrete element method can be used to obtain information on the contact forces between seed particles and mechanical parts, as well as the velocity and displacement of seed particle motion from a microscopic perspective. This paper summarizes the application of the discrete element method in soybean cultivation and production processes in recent years. This will help future researchers to conduct relevant test studies, develop and improve existing research methods. It can also serve as a guide and reference for the production and processing of other granular materials and the optimization of agricultural machinery components.

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“…The particles studied in the above methods are round particles, but the shape of the practical particles is irregular. Currently, Studies on collision of elliptical particles [24] and collision of irregular particles [4] have also been conducted.…”

Section: Introductionmentioning

confidence: 99%

Modeling of soot particle collision and growth paths in gas-solid two-phase flow

2021

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Particle collision is an important process in soot particle growth. In this research, based on gas-solid two-phase flow, particle trajectory was traced by the Lagrange approach with periodic boundaries. Trajectory intersection, collision probability, and critical velocity were considered, and the growth path of each particle was traced. The collision frequency (fc), agglomeration frequency (fa), and friction collision frequency (ffc) were calculated, and the main influence factors of particle collision were analyzed. The results showed that fc, fa, fa/fcincreased with the increase of the particle volume fraction and gasphasevelocity(v), but the particle initial diameter (dpi) andvhad the great influence on fa/fc. fa/fcobviously decreased with the increase of dpiand v.The statistical analysis of fa/fcand Stokes number showed that fa/fcdecreased with the increase of Stokes number, especially when stokes number was extremely small, fa/fcdecreased rapidly. Using the trajectory analysis of each particle, the particle growth process could be classified in three types: firstly, the particles that did not agglomerate with any particles during the entire calculation process; secondly, the particles that continually agglomerated with small particles to generate larger ones; and finally, the particles that were agglomerated by larger particles at some calculation moment.

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A new collision model for ellipsoidal particles in shear flow

Cited by 11 publications

References 47 publications

A collision model for DNS with ellipsoidal particles in viscous fluid

A collision model for DNS with ellipsoidal particles in viscous fluid

A Review of the Application of Discrete Element Method in Agricultural Engineering: A Case Study of Soybean

Modeling of soot particle collision and growth paths in gas-solid two-phase flow

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