Entrainment of particles during the withdrawal of a fibre from a dilute suspension
Name
2006.15278.pdf
Description
Submitted version
Size
2.39 MB
Format
Adobe PDF
Checksum (MD5)
c4f194349550e9c3713552cf6fd7671c
Author(s)
Dincau, BM
Mai, E
Magdelaine, Q
Lee, JA
Bazant, MZ
Sauret, A
Date Issued
2020
Journal
Journal of Fluid Mechanics
Publisher
Cambridge University Press (CUP)
Version
Original manuscript
Abstract
© The Author(s), 2020. A fibre withdrawn from a bath of a dilute particulate suspension exhibits different coating regimes depending on the physical properties of the fluid, the withdrawal speed, the particle sizes and the radius of the fibre. Our experiments indicate that only the liquid without particles is entrained for thin coating films. Beyond a threshold capillary number, the fibre is coated by a liquid film with entrained particles. We systematically characterize the role of the capillary number, the particle size and the fibre radius on the threshold speed for particle entrainment. We discuss the boundary between these two regimes and show that the thickness of the liquid film at the stagnation point controls the entrainment process. The radius of the fibre provides a new degree of control in capillary filtering, allowing greater control over the size of the particles entrained in the film.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mathematics
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1017/JFM.2020.643
