Brazil-nut effect versus reverse Brazil-nut effect in a moderately dense granular fluid
نویسندگان
چکیده
منابع مشابه
Granular convection and the Brazil nut effect in reduced gravity.
We present laboratory experiments of a vertically vibrated granular medium consisting of 1-mm-diameter glass beads with embedded 8-mm-diameter intruder glass beads. The experiments were performed in the laboratory as well as in a parabolic flight under reduced-gravity conditions (on Martian and Lunar gravity levels). We measured the mean rise velocity of the large glass beads and present its de...
متن کاملA horizontal Brazil-nut effect and its reverse.
Transport effects in a monolayer consisting of a binary granular mixture, confined in a horizontally vibrating circular dish, are studied experimentally and compared with a reduced theoretical model. Depending on the ratio of the particles' material density and size, migration of the larger particles occurs either towards the boundary or to the center of the circular container. These directed m...
متن کاملCompetition of Brazil nut effect, buoyancy, and inelasticity induced segregation in a granular mixture
It has been recently reported that a granular mixture in which grains differ in their restitution coefficients presents segregation: the more inelastic particles sink to the bottom. When other segregation mechanisms as buoyancy and the Brazil nut effect are present, the inelasticity induced segregation can compete with them. First, a detailed analysis, based on numerical simulations of two dime...
متن کاملScaling behavior in the convection-driven Brazil nut effect.
The Brazil nut effect is the phenomenon in which a large intruder particle immersed in a vertically shaken bed of smaller particles rises to the top, even when it is much denser. The usual practice while describing these experiments has been to use the dimensionless acceleration Γ = aω(2)/g, where a and ω are, respectively, the amplitude and the angular frequency of vibration and g is the accel...
متن کاملGranular Mechanics in Asteroid Regolith: Simulating and Scaling the Brazil Nut Effect
Introduction It is well known that shaking can drive size sorting and segregation in granular media ( [1] and references therein). We consider the hypothesis that seismic shaking on asteroids could promote the size sorting of its constituent particles [2]. Such sorting is evident in the images sent by the Hayabusa mission of the surface of the asteroid Itokawa [3]. The simplest example of this ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 2008
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.78.020301