Fragmentation in oblique impaction for nanoparticle-agglomerates with different structures

Gensch, Manuel; Weber, Alfred P.

doi:10.1016/j.apt.2018.09.029

Cited by 5 publications

(6 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As already indicated in Fig. 1b in the case of oblique impaction only a fraction of the total velocity, i.e., the normal component, conducts the particles towards the wall [21]. In Fig.…”

Section: Characterization Of the Oblique Impactionsupporting

confidence: 66%

“…Therefore, higher gas velocities are necessary to achieve the same degree of deposition. With an increasing obliquity, also the sharpness of cut decreases due to less severe deviation and a more asymmetric distribution of impact velocities and impact positions 21. For a given Stokes number an increase of L / D ratio leads to reduced impaction angles because of the above‐mentioned slowing of the jet velocity by gas entrainment.…”

Section: Resultsmentioning

confidence: 99%

“…For a given Stokes number an increase of L / D ratio leads to reduced impaction angles because of the above‐mentioned slowing of the jet velocity by gas entrainment. However, at high values of Stokes the particles are focused on the center line of the gas jet resulting in a narrower distribution of impact velocities and positions 21, 22.…”

Section: Resultsmentioning

confidence: 99%

“…This effect is supposedly due to the phenomenon that at higher impact velocities the particles are again able to escape the greased target surface by a combination of rolling, gliding and bouncing. More details on the velocity calculation by Rennecke and Weber [22] and Gensch and Weber [21] can be found in the Supporting Information.…”

Section: Characterization Of the Oblique Impactionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of the Impaction Angle on the Triboelectric Charging of Aerosol Nanoparticles

Bierwirth

Gensch

Weber

2021

Chemie Ingenieur Technik

View full text Add to dashboard Cite

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Supporting Information available onlineA low pressure impactor is used to measure triboelectric charging behavior of metallic nanoparticles. Ag nanoparticles, produced by spark discharge, were impacted onto Pt sputtered targets. The influence of the impaction angle and impaction velocity on the triboelectric charging was investigated. While for perpendicular impaction the charge transfer behavior of previous work was confirmed, the oblique impaction revealed new phenomena. Additional charge transfer was observable, which increases with obliqueness. The possibility of mass transfer between particle and target due to the high-energy collisions was also investigated. SEM characterization and Auger spectroscopy indicate mass transfer from the particle to the target surface.

show abstract

“…As already indicated in Fig. 1b in the case of oblique impaction only a fraction of the total velocity, i.e., the normal component, conducts the particles towards the wall [21]. In Fig.…”

Section: Characterization Of the Oblique Impactionsupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of the Oblique Impactionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the Impaction Angle on the Triboelectric Charging of Aerosol Nanoparticles

Bierwirth

Gensch

Weber

2021

Chemie Ingenieur Technik

View full text Add to dashboard Cite

show abstract

“…The collision characteristics between the complex agglomerates would depend on their structure and mechanics properties; however, such models or studies are scarce in the literature. If we do not limit to nanoparticle agglomerates, instead, various kinds of agglomerates are concerned with, the characteristics of agglomerates during collisional fragmentation have been investigated by quite a few experimental [5][6][7][8] and numerical simulation [9][10][11][12][13][14][15][16][17][18] studies.…”

Section: Introductionmentioning

confidence: 99%

A finite‐discrete element model for simulating collision and fragmentation of nanoparticle agglomerates

Zhang,

Liu

2023

AIChE Journal

View full text Add to dashboard Cite

The fragmentation/adhesion behavior of nanoparticle agglomerate collision, which is challenging to model, is a crucial factor affecting fluidization. In this study, a discrete‐finite element method (FDEM) based cohesive crack model is developed to simulate normal collisions between a complex agglomerate (around 1 mm) and a wall. In the FDEM model, the complex agglomerate is built from primary agglomerates (around a few micrometers), whose adhesive force and Young's modulus are measured by an atomic force microscope (AFM). The simulation results including fragmentation morphology and plastic deformation agree well with the collision experiments. Finally, the sensitivity of the model is tested, including adhesive force, solid holdup, and Young's modulus. Fragment distribution is found to fit well with a two‐parameter Weibull function and damage ratio is found to have a polynomial relation with a modified Weber number. The model output shows a potential to be utilized in macroscopic model.

show abstract

Influence of clean air and inlet configuration on the performance of slit nozzle virtual impactor

Zahir

Heo

Yook

2019

Advanced Powder Technology

View full text Add to dashboard Cite

Fragmentation in oblique impaction for nanoparticle-agglomerates with different structures

Cited by 5 publications

References 29 publications

Influence of the Impaction Angle on the Triboelectric Charging of Aerosol Nanoparticles

Influence of the Impaction Angle on the Triboelectric Charging of Aerosol Nanoparticles

A finite‐discrete element model for simulating collision and fragmentation of nanoparticle agglomerates

Influence of clean air and inlet configuration on the performance of slit nozzle virtual impactor

Contact Info

Product

Resources

About