INTERMITTENT TURBULENCE IN THE SOLAR-WIND

被引:226
作者
BURLAGA, LF
机构
关键词
D O I
10.1029/91JA00087
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
This paper demonstrates the existence of intermittent turbulence in the solar wind at 8.5 AU. The pth-order velocity structure functions show scaling behavior in the range of periods from 0.85 hour to 13.6 hours for p less-than-or-equal-to 20. The exponent of the scaling law s(p) is a quadratic function of p. Our observations of s(p) for compressible MHD turbulence on a scale of the order of approximately 1 AU = 1.5 x 10(8) km are consistent with laboratory measurements of s(p) for gasdynamic turbulence on a scale of the order of 1 m, indicating the universal character of intermittent turbulence. The observations are not described by the "constant beta" model of intermittent turbulence. They are marginally consistent with the lognormal model. The observations are consistent with a random beta model prediction which assumes that the turbulence is a mixture of sheets and space-filling eddies.
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页码:5847 / 5851
页数:5
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