Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session J18: Flow of Dense Granular Materials and Suspensions
3:00 PM–6:00 PM,
Tuesday, March 16, 2021
Sponsoring
Unit:
GSNP
Chair: Ishan Srivastava
Abstract: J18.00003 : Bedform dynamics: interaction, attraction and repulsion of dunes*
4:12 PM–4:48 PM
Live
Presenter:
Nathalie Vriend
(Univ of Cambridge)
Authors:
Nathalie Vriend
(Univ of Cambridge)
Karol A Bacik
(Univ of Cambridge)
Paul Jarvis
(University of Geneva)
Here, we present a unique, recirculating, laboratory experiment in which we create and trace aqueous dunes over long times. We examine the interaction between two dunes of different sizes, and present a phase space diagram with outcomes of the resulting interaction. Furthermore, we explore the feedback mechanism between a bedform and the flow providing the forcing, and identify a repulsion mechanism that ensures that bedforms do not coarsen without limit.
**NMV was supported by a Royal Society Dorothy Hodgkin Fellowship (DH120121) and currently is supported by a Royal Society University Research Fellowship (URF191332). This research was partly funded by Royal Society Challenge Grant (CH160065), an Isaac Newton Trust Early Career Grant (RG74916) and a PhD studentship from Schlumberger Research Cambridge Limited.
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