5 papers
On the scaling of bubble interactions in dynamic turbulence: theoretical, numerical, and experimental study
Vivek Kumar, Prasoon Suchandra, Shivam Prajapati +2
This study investigates dilute bubbly decaying homogeneous isotropic turbulence at high Reynolds number using theory, direct numerical simulation, and experiments. The turbulent ki…
Mass-Transfer Control With Microbubbles in Highly Turbulent Decaying Flows
Vivek Kumar, Prasoon Suchandra, Jason Rom +3
We hypothesize that combining extreme turbulence with a minute reduction in surface tension (surface tension of the liquid) using surfactant provides a simple and scalable rou…
Laminar-to-Turbulent Transition of Yield-Stress Fluids in Pipe and Channel Flows
Shivam Prajapati, Prasoon Suchandra, Vivek Kumar +3
We present direct numerical simulations (DNS) of laminar to turbulent transition in Herschel-Bulkley (HB) yield-stress fluids flowing through pipes and rectangular channels. The si…
Depth-Aware Machine Learning Framework for Bubble Characterization in Two-Phase Flows
Chaitanya S Nayak, Faizaan Mohammed, Vivek Kumar +2
Understanding the three-dimensional motion of bubbles is essential for interpreting transport and mixing in multiphase flows, especially when bubbles deform under shear or move rap…
Bubble coalescence dynamics in a high-Reynolds number decaying turbulent flow
Vivek Kumar, Prasoon Suchandra, Ardalan Javadi +2
This study experimentally investigates bubble size evolution and void fraction redistribution in an unexplored, coalescence-dominated regime of decaying turbulent bubbly flow. The…