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Structural sensitivity of the precessing vortex core instability in swirled jets
This thesis performs an LES study of the flow through a swirling nozzle. The nozzle has
one single stream with swirl being generated by vanes mounted on an axially aligned
centrebody. The end face of the centrebody ...
Stability of wall-bounded compressible shear flows
In this work, the linear stability of compressible shear flows in channels and pipes are studied. A steady fully-developed laminar flow of an ideal gas, driven in a channel and a pipe by a constant body acceleration, is ...
Numerical Analysis to Understand Influence of Ventilation Systems on Thermal Comfort Parameters, Quality of Air, and Local Sweating
The body’s heat exchange mechanisms include sensible heat transfer at the skin surface (also called “Dry Heat exchange”) due to temperature differences (via conduction, convection, and radiation (long-wave and short-wave)), ...
Coalescence of Polymeric Droplets
Coalescence is an energy minimization phenomenon in which two equilibrium droplets undergo
a transition to attain a final equilibrium state, i.e., a coalesced state. Coalescence begins
with a point contact between the ...
Direct Numerical Simulation of Square Vortex Flows
Atmospheric and oceanic flows are often modeled as two-dimensional due to their large planar extents (∼ 1000 km) and small vertical extent (∼ 10 km). Most phenomena in these systems are governed by the theory of two-dimensional ...
Secondary Atomization of a Droplet in Diverse Interaction Settings
Secondary atomisation refers to the process by which liquid droplets, which are already in a dispersed state, are further atomised down into smaller droplets. This process occurs after primary atomisation, which is the ...
Insights into evaporation, atomization and precipitate formation of polymer droplets
Evaporation of polymer droplets is an active area of interest due to its applications in systems such as ink jet printing, thin films, spray combustors to name a few. Thus, understanding complex dynamics of evaporating ...
Vorticity and scalar transport in turbulent round jets with and without heating
The round turbulent jets are ubiquitous in both natural and engineered systems such as clouds,
engine exhausts, chimney plumes, and respiratory flows. We aimed to understand the vorticity and
scalar transport in turbulent ...
Interfacial oscillations and atomization of liquid jets from non-circular orifices
Understanding the flow behaviour of liquid jets discharging from orifices is essential for several applications such as fuel spraying, ink-jet printing, aerosol devices in pharmaceutical industries, micro-machined fuel ...