eprintid: 10203826
rev_number: 17
eprint_status: archive
userid: 699
dir: disk0/10/20/38/26
datestamp: 2025-02-28 10:19:58
lastmod: 2025-02-28 10:19:58
status_changed: 2025-02-28 10:19:58
type: thesis
metadata_visibility: show
sword_depositor: 699
creators_name: Liu, Qingsong
title: Fluid-particle interactions in channel flows
ispublished: unpub
divisions: UCL
divisions: B04
divisions: C06
divisions: F59
note: Copyright © The Author 2025. Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) Licence (https://creativecommons.org/licenses/by-nc/4.0/).  Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms.  Access may initially be restricted at the author’s request.
abstract: This thesis describes a research study on mathematical modelling of solid particle
trajectories in a fluid-filled channel. Inspired by the idea that ice crystal particles
can clog sensors on aircraft wings, the original motivation for the research is to
avoid collisions between particles and channel walls. Therefore most of the twodimensional
solution testing stops at the moment when the particle collides with
the channel wall. The thesis, which combines numerical and analytical work, begins
with investigations of the trajectory of a single particle in a fixed shape channel
within which the oncoming inviscid fluid flow is uniform; here we find sustained oscillations
provide a possible way to keep the particle moving in the channel without
collision. Then we move on to the motion trajectories of a particle in an expanding
or contracting channel subject to various different channel shapes. In the subsequent
chapter we create a multi-particle motion model. Besides the fixed shape model or
the regular shape model, the motion trajectories of a particle in a flexible-walled
channel whose deformation is caused by the pressure effects are also considered
in this thesis. In the final two chapters, the motion trajectories of a particle in a
fluid within flow at low Reynolds number are addressed, followed by the overall
conclusion.
date: 2025-01-28
date_type: published
oa_status: green
full_text_type: other
thesis_class: doctoral_open
thesis_award: Ph.D
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2354459
lyricists_name: Liu, Qingsong
lyricists_id: QLIUB33
actors_name: Liu, Qingsong
actors_id: QLIUB33
actors_role: owner
full_text_status: public
pages: 191
institution: UCL (University College London)
department: Mathematics
thesis_type: Doctoral
editors_name: Smith, Frank
citation:        Liu, Qingsong;      (2025)    Fluid-particle interactions in channel flows.                   Doctoral thesis  (Ph.D), UCL (University College London).     Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10203826/7/Liu_10203826_Thesis_id_removed.pdf