Turbulent fluid flow characteristics: investigation using dynamic laser light scattering technique

S. V. Bhat; Karan Pal; S. Chopra

doi:10.1117/12.346794

29 April 1999 Turbulent fluid flow characteristics: investigation using dynamic laser light scattering technique

S. V. Bhat, Karan Pal, S. Chopra

Proceedings Volume 3729, Selected Papers from International Conference on Optics and Optoelectronics '98; (1999) https://doi.org/10.1117/12.346794
Event: Selected Papers from the International Conference on Optics and Optoelectronics, 1998, Dehradun, India

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.

Citation Download Citation

S. V. Bhat, Karan Pal, and S. Chopra "Turbulent fluid flow characteristics: investigation using dynamic laser light scattering technique", Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); https://doi.org/10.1117/12.346794

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