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Title: A high-order finite difference investigation of boundary layer perturbations
Author: Togneri, Michael
ISNI:       0000 0004 2750 0443
Awarding Body: Cardiff University
Current Institution: Cardiff University
Date of Award: 2010
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Following this, we examine the use of spanwise oscillation of the wall, which is known to reduce drag in turbulent boundary layers. The parameters of the oscillation (specifically its magnitude, its frequency and the phase difference between the wall motion and the streak forcing) are altered and their influence on streak development investigated. It is found that in certain cases, the modification to the basis flow by wall oscillation means that the perturbations can grow exponentially. We also investigate the effects of altering the pattern of oscillation from sinusoidal in time to a smoothed square wave or sawtooth wave.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available