On the characteristics and stability of the wakes of cylinders with a triangular cross-section
thesisposted on 19.11.2019 by ZHI YUEN NG
In order to distinguish essays and pre-prints from academic theses, we have a separate category. These are often much longer text based documents than a paper.
Fluid flowing past a cylindrical structure can change the way it moves upon contact with the cylinder. Abrupt changes in their dynamics occur through transitions and can elicit a response from the cylinder through oscillations and larger air resistance, amongst other responses, which may be detrimental to engineering structures if overlooked or underestimated. This thesis investigates the causes of such transitions when the cylinder presents sharp corners to- or is asymmetrically aligned with the flow. The results here demonstrates when such transitions may occur and the fast transition to wake turbulence thereafter, and how the structure might react to it.