Abstract We introduce a mean-field framework for the study of systems interacting particles sharing conserved quantity. The work generalises and unites existing fields asset-exchange models, often applied to socio-economic systems, aggregation-fragmentation typically used in modelling dynamics clusters. An initial model includes only two-body collisions, which is then extended include many-body...

The Shifting Sand is a barchan dune in Ngorongoro Lengai Geopark Arusha, Tanzania. geopark, UNESCO World Heritage Site, protected by the Conservation Area Authority. ranks amongst main geosites that have been attracting numerous tourists; it formed as result of volcanic ash eruptions led to tephra deposition on palaeosol (palaeosurface) Ootun area. easterly winds modified into dunes and headed ...

[1] Although evidence is mounting that links global warming to changes in atmospheric dynamics over the Atlantic realm, similar studies over the African continent are lacking. And even if such models would exist, it would be difficult to verify their validity due to the paucity of meteorological observations and anemometers in the central Sahara. A pragmatic way around this problem is to monito...

Studies of sand saltation are currently concentrating on wind tunnel experiments, theoretical analyses and numerical simulations under ideal as well as controllable conditions. These theoretical analyses and numerical simulations cannot accurately predict sand movements in field environments. In this paper, we simulate wind field patterns for two different surfaces of complex microtopography us...

Preprint of Capape, S., Martín-Vide, J., and Colombo, F. (2016). “Subaqueous Barchans and 1 Plane Beds from Deposition of Quartz Silt.” J. Hydraul. Eng., 10.1061/(ASCE)HY.19432 7900.0001212, 06016020 3 Subaqueous Barchans and Plane Beds from Deposition of Quartz Silt 4 S. Capape*, J.P. Martín-Vide, and F. Colombo 5 Abstract 6 The suspension flow of quartz silt (geometric mean grain size of 4.15...