EXPERIMENTAL TEST OF TIME SCALES IN FLOWING SAND

被引：36

作者：

BAXTER, GW ^{[1
]}

LEONE, R ^{[1
]}

BEHRINGER, RP ^{[1
]}

机构：

[1] DUKE UNIV,CTR NONLINEAR STUDIES,DURHAM,NC 27706

来源：

EUROPHYSICS LETTERS | 1993年 / 21卷 / 05期

关键词：

WAVES; NON-NEWTONIAN DYNAMICS; OTHER TOPICS IN MECHANICAL AND ACOUSTICAL PROPERTIES OF CONDENSED MATTER;

D O I：

10.1209/0295-5075/21/5/011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe dynamic measurements of the stress obtained during a sand flow. The data show a large noise component as seen in power spectra for these data which satisfy P = = P0omega(-alpha) over at least three decades. Values of alpha span 1.3 less-than-or-equal-to alpha less-than-or-equal-to 2.3. A calculation of the Hurst parameter of fractional Brownian motion yields values of H which satisfy alpha = 2H + 1 within statistical errors. A time scale predicted from continuum models of sand flow may be present, but the inherent noise makes this scale difficult to determine.

引用

页码：569 / 574

页数：6

共 11 条

[1]

BAXTER GW, 1990, 2 PHASE FLOWS WAVES

[2]

BAXTER GW, 1991, EUR J MECH B S181, V10

[3]

BEHRINGER RP, 1992, IN PRESS PATTERN FOR

[4]

Feder J., 1988, FRACTALS