| Title: |
On the influence of bed roughness on saltation in inertial regime |
| Authors: |
Minster, Gaspard; Floc'H, France; Valance, Alexandre; Le Dantec, Nicolas; Nicolle, Amandine; Zerr, Benoit |
| Contributors: |
Lab-STICC_ENSTAB_CID_PRASYS; Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC); École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique); Institut Mines-Télécom Paris (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique); Institut Mines-Télécom Paris (IMT); École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne); Geo-Ocean (GEO-OCEAN); Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS); Institut de Physique de Rennes (IPR); Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS); Institut Universitaire Européen de la Mer (IUEM); Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS); Département STIC Brest (STIC); Adaptation et diversité en milieu marin (ADMM); Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff = Roscoff Marine Station (SBR); Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Equipe ROBotics for EXploration (Lab-STICC_ROBEX); Agence Nationale de la Recherche,Grant/Award Numbers: ANR-10-IEED-0006-10, ANR-17-EURE-0015; Investissements d’Avenir; ANR-10-IEED-0006,FEM,France Energies Marines(2010); ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
| Source: |
ISSN: 0197-9337. |
| Publisher Information: |
HAL CCSD; Wiley |
| Publication Year: |
2024 |
| Collection: |
Université de Rennes 1: Publications scientifiques (HAL) |
| Subject Terms: |
bed roughness; coarse sediment; critical Shields; inertial regime; saltation; [SDE]Environmental Sciences; [PHYS]Physics [physics] |
| Description: |
International audience ; In extreme tidal environment, occurrences of saltating pebbles have been observed. The ambition to instal hydrokinetic turbines in such environment requires knowledge on the presence of pebbles in saltation in the water column because they can damage the structures. An experimental study is realized in a free-surface flume with no slope and different bed roughnesses as in marine environment. With fast camera the trajectories of hundreds of spherical particles are analysed. Our study deals with saltation in the inertial regime (i.e., large Stokes number) over fixed beds with various roughnesses. In inertial regime, the bed roughness has more influence on the collision process and the trajectory of the particles than for non-inertial motion where viscous forces play a key role. Jump height and length increase with bed roughness, with height increasing quicker than length leading to a more vertical trajectory for higher bed roughness. The vertical restitution coefficient is shown to increase with bed |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1002/esp.5767 |
| Availability: |
https://hal.univ-brest.fr/hal-04419645; https://hal.univ-brest.fr/hal-04419645v1/document; https://hal.univ-brest.fr/hal-04419645v1/file/Earth%20Surf%20Processes%20Landf%20-%202024%20-%20Minster%20-%20On%20the%20influence%20of%20bed%20roughness%20on%20saltation%20in%20inertial%20regime.pdf; https://doi.org/10.1002/esp.5767 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.199F1285 |
| Database: |
BASE |