Viscosity and thermal fields associated with strongly chaotic non‐Newtonian thermal convection

A. V. Malevsky, David A Yuen, L. M. Weyer

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)127-130
Number of pages4
JournalGeophysical Research Letters
Volume19
Issue number2
DOIs
StatePublished - Jan 24 1992

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