8 papers
Direct numerical simulations of multi-layer Rayleigh-Taylor instability under asymmetric interfacial density stratification
Abhijeet Guha, Prasoon Suchandra, Aditi Sengupta
Direct numerical simulations of thermally stratified multi-layer Rayleigh-Taylor instability are performed to investigate the influence of interfacial Atwood number (At) on instabi…
Cascade-driven fragmentation-aggregation transitions in decaying turbulence
Vivek Kumar, Prasoon Suchandra, Shivam Prajapati +2
In decaying turbulence, the turbulent cascade is not merely a passive background for breakup but an evolving stability boundary that dynamically selects the fragmentation-aggregati…
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 rout…
Impact of the formation angle on the drag of bio-inspired -formations
Prasoon Suchandra, Shabnam Raayai-Ardakani
Bio-inspired flight formation is a well known technique for energy saving among groups of fixed-wing aircraft, and as of recently, for groups of quad-rotors. Here, we s…
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…
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…
Impact of bio-inspired V-formation on flow past arrangements of non-lifting objects
Prasoon Suchandra, Shabnam Raayai-Ardakani
Inspired by the energy-saving character of group motion, great interest is directed toward the design of efficient swarming strategies for groups of unmanned aerial/underwater vehi…