Order and chaos in fluid flows

Narasimha, R (1986) Order and chaos in fluid flows. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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This document is a slightly extended version of the fourth13; C V Raman Memorial Lecture given at the Indian Institute13; of Science on 3 March 1986. The chief aim of the Lecture was to discuss the role that order and chaos play in the dynamics of fluid motion. After briefly reviewing the major features of transitions from order to chaos and back that have emerged from observations over several decades, their possible relations with more recent work on dynamical systems exhibiting chaotic behaviour is discussed. It is concluded that certain basic features13; characteristic of turbulence, such as the appearance of high frequency chaos during transition, the persistence of chaos as nonlinearity increases, and the strong influence of external perturbations on the onset of chaos, are not yet within the scope of the new theories. However these recent developments have highlighted a significant and fascinating question, which is whether all transitions from order to chaos would follow only a finite number of possible fundamental modes. The answer to this question is not yet clear, but if it is yes, it certainly seems all possible modes have not, yet been discovered. However the question raised is extremely important and should be exciting and rewarding to pursue.

Item Type: Monograph (Technical Report)
Additional Information: Fourth Raman Memorial Lecture delivered at the Indian Institute of Science, Bangalore on 3 March 1986
Uncontrolled Keywords: Order;Chaos;Fluid flows
Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
Depositing User: Mr. Ravikumar R
Date Deposited: 19 Sep 2006
Last Modified: 24 Aug 2015 08:42
URI: http://nal-ir.nal.res.in/id/eprint/2730

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