VISCOSITY AND THERMAL FIELDS ASSOCIATED WITH STRONGLY CHAOTIC NON-NEWTONIAN THERMAL-CONVECTION

被引：15

作者：

MALEVSKY, AV ^{[1
]}

YUEN, DA ^{[1
]}

WEYER, LM ^{[1
]}

机构：

[1] UNIV MINNESOTA,DEPT GEOL & GEOPHYS,MINNEAPOLIS,MN 55455

来源：

GEOPHYSICAL RESEARCH LETTERS | 1992年 / 19卷 / 02期

关键词：

D O I：

10.1029/91GL03181

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We have investigated the thermomechanical structure in strongly chaotic non-Newtonian thermal convection for both base-heated and internally-heated systems. Temperature can build up in stagnant regions and a non-Newtonian mantle can tolerate less internal-heating. Viscosity fields of strongly chaotic regime show a granular structure. The horizontal spectra of viscosity fluctuations obey a power-law and yield a fractal dimension of 1. 6 to 1. 8 for the isoviscosity lines, providing evidence for two-dimensional turbulence. Long wavelength viscosity variations are smoothed out by the turbulent non-Newtonian flows.

引用

页码：127 / 130

页数：4

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