Deposition of a particle-laden film on the inner wall of a tube

Deok-Hoon Jeong, Anezka Kvasnickova, Jean-Baptiste Boutin, David Cébron, and Alban Sauret
Phys. Rev. Fluids 5, 114004 – Published 19 November 2020
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Abstract

The withdrawal of a liquid or the translation of a liquid slug in a capillary tube leads to the deposition of a thin film on the inner wall. When particles or contaminants are present in the liquid, they deposit and contaminate the tube if the liquid film is sufficiently thick. In this article, we experimentally investigate the condition under which particles are deposited during the air invasion in a capillary tube initially filled with a dilute suspension. We show that the entrainment of particles in the film is controlled by the ratio of the particle and the tube radii and the capillary number associated with the front velocity. We also develop a model which suggests optimal operating conditions to avoid contamination during the withdrawal of a suspension from a tube. This deposition mechanism can also be leveraged in coating processes by controlling the deposition of particles on the inner walls of channels.

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  • Received 11 August 2020
  • Accepted 2 November 2020

DOI:https://doi.org/10.1103/PhysRevFluids.5.114004

©2020 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft MatterFluid Dynamics

Authors & Affiliations

Deok-Hoon Jeong1, Anezka Kvasnickova1, Jean-Baptiste Boutin1, David Cébron2, and Alban Sauret1,*

  • 1Department of Mechanical Engineering, University of California, Santa Barbara, California 93106, USA
  • 2Université Grenoble Alpes, CNRS, ISTerre, Grenoble, France

  • *asauret@ucsb.edu

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Issue

Vol. 5, Iss. 11 — November 2020

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