The influence of surface roughness and adhesion on particle rolling
| Autor: | B. G. M. van Wachem, Robert Wilson, Daniele Dini |
|---|---|
| Přispěvatelé: | Engineering and Physical Sciences Research Council, Engineering & Physical Science Research Council (EPSRC) |
| Rok vydání: | 2017 |
| Předmět: |
Length scale
Technology Engineering Chemical Materials science FLOW General Chemical Engineering Rolling resistance Flow (psychology) 0904 Chemical Engineering 02 engineering and technology symbols.namesake Engineering Surface roughness 0203 mechanical engineering Discrete element model RIGID PLANE Science & Technology Metallurgy FRICTION VAN-DER-WAALS NONSPHERICAL PARTICLES Adhesion Mechanics Chemical Engineering 021001 nanoscience & nanotechnology SPHERES MODEL 020303 mechanical engineering & transports SIMULATION symbols Chemical Engineering(all) Particle ELASTIC CONTACT FORCES van der Waals force 0210 nano-technology 0913 Mechanical Engineering |
| Zdroj: | Powder Technology. |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2017.01.080 |
| Popis: | The influence of surface roughness and contact adhesion on the rolling behaviour of dry particles has been investigated. Rough particle surfaces are approximated using an array of spheres, the properties of which are informed by random processes. An analytical model has been derived by considering the torques that a particle experiences. Two mechanisms of rolling resistance are explored – a stationary particle experiencing a tangential force, and a dynamically rolling particle. The analytical model is found to agree well with simulations of the equivalent system using the discrete element model. Adhesive forces are found to increase rolling resistance in all cases. The complex consequences of varying the height variance and length scale of the surface roughness are reproduced accurately by the analytical model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect