Adhesion study between micron-scale graphite particles and rough walls using the finite element method

Sun, Qi; Peng, Wei; Xiao, Hai; Yu, Suyuan

doi:10.1016/j.apt.2021.04.005

Cited by 6 publications

(6 citation statements)

References 37 publications

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“…This makes the capillary force less sensitive to the irregular shape of the particle or the surface roughness of the particle and contact surface. It was reported earlier that the contact radius is a key factor that influences the adhesion force [13,15]. In the present study, the adhesion forces were mainly composed of van der Waals and capillary forces.…”

Section: Measurement Of Adhesion Force Between Coal Dust Particles An...supporting

confidence: 48%

“…It is seen from Equations ( 1) and ( 3) that an increase in contact radius leads to an increase in the adhesion force. However, according to the adhe- It was reported earlier that the contact radius is a key factor that influences the adhesion force [13,15]. In the present study, the adhesion forces were mainly composed of van der Waals and capillary forces.…”

Section: Measurement Of Adhesion Force Between Coal Dust Particles An...mentioning

confidence: 52%

“…The adhesion of small particles to materials exists in multiple domains, such as the photovoltaic industry [9,10], the food industry [11], the pharmaceutical industry [12], marine mining [13,14], the nuclear industry [15], and indoor air quality monitoring [16], and has been extensively studied. Moutinho et al [9] studied the effect of surface roughness and relative humidity (RH) on the adhesion force between dust particles and solar glass using atomic force microscopy (AFM).…”

Section: Introductionmentioning

confidence: 99%

“…Ma et al [13,14] studied the adhesion force between particles of deep-sea soil and metals using in situ AFM, and the results indicated that the 5052 aluminum alloy had better self-cleaning properties than pure titanium and titanium alloys and that there existed a critical surface roughness that corresponded to the minimum adhesion force. Sun et al [15] studied the adhesion of graphite particles with rough walls of gas-cooled reactors. The results showed that the adhesion increased with particle size, and both surface roughness and aspherical particle morphology played important roles, which caused obvious deviations between the results of AFM measurements and theoretical models hypothesizing spherical particles and a smooth, flat plane.…”

Section: Introductionmentioning

confidence: 99%

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Adhesion Behavior of Underground Coal Dust with Fused Silica: Effects of Relative Humidity and Particle Size

Zhou,

Yang,

Shang

2024

Processes

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Coal dust particles adhering to a camera lens reduce its light transmittance, which deteriorates the performance of the camera and may lead to serious problems with mining equipment that requires visual ability. Aiming at improving coal dust removal and cleaning technologies, the adhesion behavior of coal dust with fused silica is studied here. Experiments were conducted from microscopic and statistical points of view. The adhesion force between a single coal dust particle and fused silica is tested using atomic force microscopy (AFM), and the number and size distribution of large amounts of coal dust particles on fused silica are tested using a home-made adhesion experimental platform and image processing method. The results show that the adhesion force increases at high relative humidity (RH); it is dominated by van der Waals forces at low RH and capillary forces at high RH. The fused silica glass surface is predominantly covered by small-sized coal dust particles, and the total number of particles as well as the proportion of large-sized particles increases with RH. The theoretical values of van der Waals and capillary forces are significantly larger than the experimental values, owing to the irregular shape and roughness of the surface of the coal dust.

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Section: Measurement Of Adhesion Force Between Coal Dust Particles An...supporting

confidence: 48%

Section: Measurement Of Adhesion Force Between Coal Dust Particles An...mentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adhesion Behavior of Underground Coal Dust with Fused Silica: Effects of Relative Humidity and Particle Size

Zhou,

Yang,

Shang

2024

Processes

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“…When calculating the physical information inside the particles, the finite element method (FEM) is widely used [5][6][7]. It is a numerical solution method for elastic mechanics problems that developed rapidly with the advancement of computer power.…”

Section: Introductionmentioning

confidence: 99%

DEFEM Method and Its Application in Pebble Flows

Liu¹,

Gui²,

Wu³

et al. 2024

Energy Consumption, Conversion, Storage, and Efficiency

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Based on the concept of embedded discrete elements (EDEs), the discrete element-embedded finite element model (DEFEM) is extended in this work. The new method can be used to calculate the motion and stress variation of particles. This work discusses its application in granular flow simulation for particle motions with small deformations. The updated Lagrangian finite element method is used to obtain the coupling solution of the internal stress and the overall motion of particles in the DEFEM. The computation of deformation displacement is based on the concepts of displacement decomposition (translational and rotational motions and deformation displacement). The deformation displacement is the difference between particles and template particles [rigid body, using the discrete element method (DEM) to calculate translational and rotational displacements]. It is used to calculate the dynamic stress distribution of particles and the internal force of the node. Therefore, it has a wide scope of application (for example, it can be extended to non-spherical particles). The software validation proves the accuracy of this method. The application of the DEFEM in the accumulation process of particles is given. The motion characteristics and deformation of particles are discussed, and the stress distribution and force chain structure in particle accumulation are obtained.

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