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Seminar on "Free Turbulence, Bounded Turbulence, and Universal Theories" - 3 April 2017

Date and Venue Information:
3 April 2017, 4 PM, Room No. 2102, Academic Block II

Title of Lecture:
"​Free Turbulence, Bounded  Turbulence, and Universal Theories​" by Mahendra K. Verma, Physics Department, Indian Institute of Technology, Kanpur, India. Dr. Verma obtained his B.Tech in Computer Science from IIT Madras in 1988 and PhD from University of Maryland, USA in 1994. He has been conferred Swarna Jayanti fellowship in 2006 and an associate of International center for Theoretical Physics, Trieste.


In 1941, Kolmogorov enunciated a universal theory of fluid turbulence according to which the energy spectrum of homogeneous and isotropic flows exhibit k^{-5/3} energy spectrum. Though many experiments and simulations verify the above law, the theory is not applicable in the presence of additional forces or walls. We will show in this talk that the buoyancy-driven stably-stratified flows show k^{-11/5} spectrum. In the thermally-driven turbulence, the velocity field follows Kolmgorov’s law, and the thermal plates have profound influence on the temperature spectrum. Rotation makes major part of a turbulent flow laminar.

Thus, Kolmogorov’s universal theory of turbulence is not so universal when additional forces or walls are introduced.


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