eprintid: 10205055
rev_number: 11
eprint_status: archive
userid: 699
dir: disk0/10/20/50/55
datestamp: 2025-02-20 10:39:24
lastmod: 2025-02-20 10:39:24
status_changed: 2025-02-20 10:39:24
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Christou, A
creators_name: Stagonas, D
creators_name: Buldakov, E
creators_name: Stoesser, T
title: Focused waves on shear currents interacting with a vertical cylinder
ispublished: pub
divisions: UCL
divisions: B04
divisions: F44
keywords: Numerical wave tank, Large eddy simulations, Focused waves, Shear currents, Turbulence, Piercing cylinder
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: This paper reports on numerical simulations of focused waves on currents interacting with a vertical cylinder. The simulations are conducted using a Numerical Wave Tank (NWT) based on the method of Large Eddy Simulations (LES). Experimental data are utilised to validate the NWT's ability to reproduce accurately the wave–current kinematics for a following, an opposing and no current case, all under the same wave condition. The LES-predicted results in terms of wave elevations and velocities under wave crest and trough agree well with the experimental data for all conditions. The instantaneous and mean velocity field at various locations and current conditions as well as three-dimensional visualisations using isosurfaces of the Q-criterion showcase the complexity of the wave–current-cylinder interactions which is manifested in turbulence structures near the cylinder in the form of the horseshoe vortex, flow separation vortices as well as shear layer vortices in the cylinder wake. The effect of the focused wave on the distribution of the wall shear stress in the vicinity of the cylinder is quantified: while the overall distribution of the wall shear stress is similar with and without waves, the wall shear stress attains substantially higher values locally, up to 80 times, when the focused wave passes by than in the shear current only scenario.
date: 2025-05-15
date_type: published
publisher: Elsevier BV
official_url: https://doi.org/10.1016/j.coastaleng.2025.104698
full_text_type: other
language: eng
article_type_text: Article
verified: verified_manual
elements_id: 2357879
doi: 10.1016/j.coastaleng.2025.104698
lyricists_name: Stoesser, Thorsten
lyricists_name: Buldakov, Eugeny
lyricists_id: TSTOE28
lyricists_id: EBULD04
actors_name: Buldakov, Eugeny
actors_id: EBULD04
actors_role: owner
full_text_status: restricted
publication: Coastal Engineering
volume: 198
article_number: 104698
issn: 0378-3839
citation:        Christou, A;    Stagonas, D;    Buldakov, E;    Stoesser, T;      (2025)    Focused waves on shear currents interacting with a vertical cylinder.                   Coastal Engineering , 198     , Article 104698.  10.1016/j.coastaleng.2025.104698 <https://doi.org/10.1016/j.coastaleng.2025.104698>.      
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10205055/1/Buldakov_Focused_waves___current___cylinder_interaction__Coastal_Engineering.pdf