Abstract
Oblique collisions of two wetted spheres are simulated with numerical and analytical methods. Improved expressions are developed for squeezing and sliding lubrication forces from thin fluid layers on the sphere surfaces, and a simple expression is provided for the capillary force. Previous observations of three primary collision outcomes (rebound, stick, and stick-rotate-separate) are confirmed and extended. The analytical models show close agreement with full numerical simulations of these collision outcomes and the corresponding wet coefficient of restitution. Qualitative agreement is also shown with prior experimental work. This work is expected to have relevance for future simulations of many wet particles using discrete-element methods.
7 More- Received 23 September 2019
- Accepted 5 May 2020
- Corrected 22 September 2020
DOI:https://doi.org/10.1103/PhysRevFluids.5.054305
©2020 American Physical Society
Physics Subject Headings (PhySH)
Corrections
22 September 2020
Correction: A missing value has been inserted in Eq. (12).