Origin of stability in sedimentation -: art. no. 254503

被引：11
|
作者：
Segrè, PN [1 ]
机构：
[1] NASA, George C Marshall Space Flight Ctr, Biophys Grp, Huntsville, AL 35812 USA
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.89.254503
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Velocity fluctuations and particle concentrations are studied in a liquid fluidized bed to investigate the origin of steady state sedimentation. Both the velocity fluctuations and the particle concentrations are found to strongly depend on height. A flux balance model shows why the bed is stable: velocity fluctuations drive a downward particle flux that is compensated by an upward particle flux stemming from an excess flow velocity due to the stratification in concentration. Our results show that in steady state the magnitudes of the fluctuations are related to the degree of stratification.
引用
收藏
页数：4
相关论文
共 50 条
  • [31] Stability of γ and δ phases in Ti at high pressures -: art. no. 052106
    Joshi, KD
    Jyoti, G
    Gupta, SC
    Sikka, SK
    PHYSICAL REVIEW B, 2002, 65 (05)
  • [32] Stability of vortex structures in quantum dots -: art. no. 035421
    Saarikoski, H
    Reimann, SM
    Räsänen, E
    Harju, A
    Puska, MJ
    PHYSICAL REVIEW B, 2005, 71 (03)
  • [33] Stability of metal vicinal surfaces revisited -: art. no. 056104
    Desjonquères, MC
    Spanjaard, D
    Barreteau, C
    Raouafi, F
    PHYSICAL REVIEW LETTERS, 2002, 88 (05) : 561041 - 561044
  • [34] Fake supergravity and domain wall stability -: art. no. 104027
    Freedman, DZ
    Núñez, C
    Schnabl, M
    Skenderis, K
    PHYSICAL REVIEW D, 2004, 69 (10):
  • [35] Light ΛΛ hypernuclei and the onset of stability for ΛΞ hypernuclei -: art. no. 041001
    Filikhin, IN
    Gal, A
    PHYSICAL REVIEW C, 2002, 65 (04): : 4
  • [36] On the stability of the primordial closed string gas -: art. no. 059
    Cobas, MA
    Osorio, MAR
    Suárez, M
    JOURNAL OF HIGH ENERGY PHYSICS, 2006, (01):
  • [37] Thermal stability of ultrafine grained copper -: art. no. 094106
    Cízek, J
    Procházka, I
    Cieslar, M
    Kuzel, R
    Kuriplach, J
    Chmelík, F
    Stulíková, I
    Becvár, F
    Melikhova, O
    Islamgaliev, RK
    PHYSICAL REVIEW B, 2002, 65 (09) : 1 - 16
  • [38] Stability, causality, and Lorentz and CPT violation -: art. no. 065008
    Kostelecky, VA
    Lehnert, R
    PHYSICAL REVIEW D, 2001, 63 (06):
  • [39] Stability of AdSpXMq compactifications without supersymmetry -: art. no. 064033
    DeWolfe, O
    Freedman, DZ
    Gubser, SS
    Horowitz, GT
    Mitra, I
    PHYSICAL REVIEW D, 2002, 65 (06):
  • [40] Structure and thermal stability of gold nanoplates - art. no. 071904
    Kan, CX
    Wang, GH
    Zhu, XG
    Li, CC
    Cao, BQ
    APPLIED PHYSICS LETTERS, 2006, 88 (07)
12345