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Proceedings Paper

Turbulent fluid flow characteristics: investigation using dynamic laser light scattering technique
Author(s): S. V. Bhat; Karan Pal; S. Chopra
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Paper Abstract

Dynamic laser light scattering technique (DLLS) has been used to investigate a grid generated 3D turbulent fluid flow. The probability distribution function of relative velocity fluctuations in the flow, P(V(R,t)) is obtained from the measurements of intensity autocorrelation function, g((tau) ) of the light scattered from the turbulent medium. The intermittent nature of turbulence and the presence of small scale coherent structures in the flow field is investigated from the changes in decay rate of g((tau) ) and functional form of P(V(R,t)). DLLS is also employed to study the turbulent drag reducing properties of certain interesting linear, high molecular weight polymers like polyacrylamide. By using the Laser Doppler Velocimetry technique, we also investigated a 2D turbulent flow in a soap film flowing under gravity.

Paper Details

Date Published: 29 April 1999
PDF: 4 pages
Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); doi: 10.1117/12.346794
Show Author Affiliations
S. V. Bhat, Indian Institute of Technology/Delhi (India)
Karan Pal, Indian Institute of Technology/Delhi (India)
S. Chopra, Indian Institute of Technology/Delhi (India)

Published in SPIE Proceedings Vol. 3729:
Selected Papers from International Conference on Optics and Optoelectronics '98
Kehar Singh; Om Prakash Nijhawan; Arun Kumar Gupta; A. K. Musla, Editor(s)

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