ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Turbulence collapses at a threshold particle loading in a dilute particle-gas suspension

Kumaran, V and Muramulla, NSP and Tyagi, A and Goswami, PS (2019) Turbulence collapses at a threshold particle loading in a dilute particle-gas suspension. In: EPL, 128 (6).

[img] PDF
epl_128-06_2020.pdf - Published Version
Restricted to Registered users only

Download (773kB) | Request a copy
Official URL: https://dx.doi.org/10.1209/0295-5075/128/64001


Direct Numerical Simulations (DNS) of the flow of a particle-gas suspension in a channel have been carried out to examine the turbulence attenuation due to particles. As the volume fraction is increased in the range 0-3.5 � 10-3, there is a discontinuous decrease in the turbulent velocity fluctuations at a critical volume fraction. The turbulent energy production rate decreases by an order of magnitude, accompanied by a much smaller increase in the energy dissipation due to particle drag, resulting in a decrease in the total energy dissipation. In contrast to the current understanding, the results show that turbulence attenuation is a discontinuous process, and is due to a disruption of the turbulent energy production mechanism, and not due to the increased dissipation due to the particles. .

Item Type: Journal Article
Publication: EPL
Publisher: Institute of Physics Publishing
Additional Information: The copyright of this article belongs to Institute of Physics Publishing
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 11 Aug 2020 10:14
Last Modified: 11 Aug 2020 10:14
URI: http://eprints.iisc.ac.in/id/eprint/64924

Actions (login required)

View Item View Item