[Seminar] Prof. Prasad Perlekar "Turbulence in buoyancy-driven bubbly flows"

Speaker

Prof. Prasad Perlekar
TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research

Title

Turbulence in buoyancy-driven bubbly flows

Abstract

The flow of suspension of deformable objects (bubbles or droplets) is omnipresent in a variety of natural and industrial processes. A swarm of rising bubbles in an otherwise quiescent fluid, at moderate volume-fraction, generates pseudo-turbulence studied by several experiments and numerical simulations over the last three decades. We present a Direct Numerical Simulation (DNS) study of buoyancy-driven bubbly flows. We investigate the statistical properties of the liquid velocity comparison and make comparisons with experiments. Using the scale-by-scale energy budget analysis, we study the role of surface tension and inertial forces. 

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