ISSN:
1573-1472
Keywords:
Wind tunnel
;
Splash function
;
Restitution coefficient
;
Ejection number
;
Drifting snow
;
Saltation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract Wind-tunnel experiments of drifting snow were carried out andsplash functions were formulated to describe probability distributions of vertical restitution coefficient, horizontal restitution coefficient and ejection number when a natural snow particle collided at a natural snow surface. The following results were obtained: (1) The vertical restitution coefficient was usually larger than unity and decreased sharply with impact angle. At smaller impact angles around 5 degrees the vertical restitution coefficient exceeded a magnitude of ten. (2) The horizontal restitution coefficient, ranging from -1 to 1.5, decreased with impact velocity, but was not clearly dependent on impact angle. (3) The ejection number amounted to five per impact and increasedwith impact velocity. (4) Three splash functions to express the probability distributions of the vertical restitution coefficient, horizontal restitution coefficient and ejection number were formulated, which will be used in future computer simulations of the snow drifting process.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1002681026929
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