On the shape of barchan dunes
Klaus Kroy, Sebastian Fischer, Benedikt Obermayer
Abstract
Barchans are crescent-shaped sand dunes forming in aride regions with unidirectional wind and limited sand supply. We report analytical and numerical results for dune shapes under different environmental conditions as obtained from the so-called `minimal model' of aeolian sand dunes. The profiles of longitudinal vertical slices (i.e. along the wind direction) are analyzed as a function of wind speed and sand supply. Shape transitions can be induced by changes of mass, wind speed and sand supply. Within a minimal extension of the model to the transverse direction the scale-invariant profile of transverse vertical cuts can be derived analytically.
Create a lesson
Related papers
Designing tunable hyperuniformity in random organization through nonlocal noise
Yusheng Lei, Yuhan Peng, Ran Ni
Long-time Brownian dynamics of hard and sticky colloids by geometric projection
Rémi Martin, Sandrine Duluard, Céline Merlet
Statistical approach of random packing of polydisperse similar hyperspheres: with application to binomial and lognormal size distributions
H. J. H. Brouwers
Hydrated porous substrates modulate the spatiotemporal dynamics of bacterial turbulence
Zixiang Lin, Jin Zhu, Hongyi Bian et al.
Amplified transport variability in granular slope flows near the critical angle
Fumiaki Nakai, Yuto Sasaki
Topology Does Not Determine Defect Mobility in Active Polar Matter
Abhra Puitandy, Shradha Mishra