Agrawal, M and Vyasarayani, Chandrika Prakash
(2015)
Stability of time-periodic wake flow.
Masters thesis, Indian Institute of Technology Hyderabad.
Abstract
Understanding the stability of open shear flows such as wakes and jets has important implications for flows in industry and nature. When a fluid flows past a stationary bluff body such as a cylinder, the well-known Karman vortex shedding occurs where the shed vortices align themselves in a zigzag anti-symmetric pattern. Recent experiments and numerical simulations show that if the inlet flow is oscillatory or if the cylinder oscillates about a x position, the vortex shedding pattern can sometimes be symmetric rather than asymmetric. The goal of this thesis is to gain insight into the pattern formation process resulting in a symmetric shedding pattern. This can be achieved by carrying out a stability analysis on an oscillating wake profile.
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