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SUMMARY: Interactions between barchan dunes - Willian Righi Assis\, Univer
 sity of Campinas (UNICAMP). School of Mechanical Engineering
DTSTART:20220512T103000Z
DTEND:20220512T113000Z
UID:TALK173096@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Barchans are crescentic-shaped dunes formed in areas of unidir
 ectional fluid flow and a limited amount of granular material. They are or
 ganized in dune fields\, which can be found in deserts\, rivers\, the bott
 om of oceans\, and even in extraplanetary environments\, and the regulatio
 n of their size involves the interaction between different barchans within
  a field. This study aims to investigate the binary interactions of subaqu
 eous barchan dunes. The experiments were performed at the University of Ca
 mpinas (Brazil) and the setup consisted of a 5 m long closed-conduit chann
 el with a rectangular cross-section (width = 160 mm and height = 50mm). A 
 camera was placed above the test section to record the interactions. As a 
 result\, we could observe five interaction patterns from a binary field an
 d we organized them into two proposed maps that provide a comprehensive cl
 assification for barchan-barchan interactions based on the Shields number 
 and the number of grains of each dune. Mass Exchange and grain motion duri
 ng the interactions were also computed. The results achieved so far repres
 ent a significant step toward understanding the size regulation of barchan
 s found in water\, air\, and even in other planetary environments. 
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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