Triboelectric charging model for particles with rough surfaces

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F25%3A43931974" target="_blank" >RIV/60461373:22340/25:43931974 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0921883125000081?pes=vor&utm_source=clarivate&getft_integrator=clarivate" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0921883125000081?pes=vor&utm_source=clarivate&getft_integrator=clarivate</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apt.2025.104787" target="_blank" >10.1016/j.apt.2025.104787</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Triboelectric charging model for particles with rough surfaces

Popis výsledku v původním jazyce

The triboelectric charging of particles depends on the contact area of the particle and the contacting surface. Even though the surface topology determines the real contact area, particle charging models do not account for surface roughness. In this paper, we combine contact mechanics and triboelectrification models to predict the charging of rough particles. First, a laser confocal microscope was used to measure the statistical descriptors of polyethylene (PE) particles surface topology. Then, we described particle surfaces by distributing spheroidal asperities on the smooth particle core until the surface roughness reached the measured value. The Hertz contact mechanics model was used to predict the deformation of the asperity-covered particle and the resulting real contact area in dependence on impact velocity. Finally, we introduced the real contact area into the condenser model for triboelectric particle charging. The accuracy of the new model predictions was demonstrated by comparing it to a more complex surface reconstructions that account for the fractal surface topology. Furthermore, the model&apos;s predicted particle saturation charges agree well with our shaker experiments and with experimental data in the literature on the charging of plane surfaces. The developed triboelectric charging model for particles with rough surfaces is simple and requires only standard descriptors of the surface topology; thus, it suits large-scale simulations of electrifying powder flows. © 2025 The Society of Powder Technology Japan

Název v anglickém jazyce

Triboelectric charging model for particles with rough surfaces

Popis výsledku anglicky

The triboelectric charging of particles depends on the contact area of the particle and the contacting surface. Even though the surface topology determines the real contact area, particle charging models do not account for surface roughness. In this paper, we combine contact mechanics and triboelectrification models to predict the charging of rough particles. First, a laser confocal microscope was used to measure the statistical descriptors of polyethylene (PE) particles surface topology. Then, we described particle surfaces by distributing spheroidal asperities on the smooth particle core until the surface roughness reached the measured value. The Hertz contact mechanics model was used to predict the deformation of the asperity-covered particle and the resulting real contact area in dependence on impact velocity. Finally, we introduced the real contact area into the condenser model for triboelectric particle charging. The accuracy of the new model predictions was demonstrated by comparing it to a more complex surface reconstructions that account for the fractal surface topology. Furthermore, the model&apos;s predicted particle saturation charges agree well with our shaker experiments and with experimental data in the literature on the charging of plane surfaces. The developed triboelectric charging model for particles with rough surfaces is simple and requires only standard descriptors of the surface topology; thus, it suits large-scale simulations of electrifying powder flows. © 2025 The Society of Powder Technology Japan

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20400 - Chemical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ADVANCED POWDER TECHNOLOGY

ISSN

0921-8831

e-ISSN

1568-5527

Svazek periodika

36

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

nestránkováno

Kód UT WoS článku

001422649900001

EID výsledku v databázi Scopus

2-s2.0-85216699686