Single and collective fiber dynamics in confined microflows
type: Dataset
description: In this thesis, we studied the transport of single fibers and suspensions of fibers in microfluidic geometries. This collaboration work between Schlumberger and ESPCI-PMMH was motivated by the use of fibers in lost-circulation curing fluids in the oil industry. In this context where fibers are closely interacting with the flow boundaries, the roles of the geometry, flexibility and concentration of fibers as well as the flow geometry need to be understood. We created a microfluidic model system, integrating in a single experiment the fabrication and the flow of tailor-made fibers, using two different techniques. This new experimental system allows us to independently investigate the effect of all flow parameters. An in situ measurement of their mechanical properties is developed. Experimental and numerical work aims at understanding the transport of an isolated fiber in the Darcy flow, depending on its orientation and confinement. We show that the interactions of the fiber with the lateral borders of the microfluidic channel can lead to regular oscillations of the fiber. The collective dynamics of higher concentration of fibers is investigated when forcing them through a restriction in the microchannel. In particular, we address the question of the role of the orientation of the fibers on the clogging of the restrictions and the formation of fiber clusters upstream of the restriction.
landing page: https://pastel.hal.science/pastel-00765635
keyword: collective-effects
keyword: ecoulements-elongationnels
keyword: ecoulements-visqueux
keyword: effets-collectifs
keyword: extensional-flows
keyword: fibers
keyword: fibres
keyword: hele-shaw
keyword: hele-shaw-cell
keyword: infoeu-reposemanticsdoctoralthesis
keyword: lost-circulation
keyword: microfabrication
keyword: microfluidics
keyword: microfluidique
keyword: perte-de-circulation
keyword: physmecameflphysics-physicsmechanics-physicsfluid-mechanics-physicsclass-ph
keyword: physphysphys-flu-dynphysics-physicsphysics-physicsfluid-dynamics-physicsflu-dyn
keyword: spimecameflengineering-sciences-physicsmechanics-physicsmed-phfluids-mechanics-physicsc
keyword: theses
keyword: viscous-flows
issued: 2026-05-30T21:55:16.552154
modified: 2026-05-30T21:55:16.552169
language: en
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Single and collective fiber dynamics in confined microflows
type: Distribution
format: HTML
access URL: https://pastel.hal.science/pastel-00765635
issued: 2026-05-30T21:55:16.579299
modified: 2026-05-30T21:55:16.478925