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ISSN Online: 2688-7231

ISBN Online: 978-1-56700-524-0

Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
December, 17-20, 2021, IIT Madras, Chennai, India

Effect of mass ratio on the response of an upstream truncated circular cylinder

Get access DOI: 10.1615/IHMTC-2021.80
pages 53-57


Simultaneous in-line and transverse vortex-induced vibrations of a circular cylinder truncated at the front face have been numerically studied using the stabilized finite-element formulation. Two sets of computations with mass ratios (m*), defined as the ratio of the mass per unit length of the truncated circular cylinder to the mass of displaced fluid per unit length, 1 and 10 are performed in the Reynolds number (Re) range of 50−200. The effect of mass ratio on the response characteristics is investigated. For both m*, the transverse displacement curve comprises three distinct zones: Desynchroniztion I (DS I), lock-in, and Desynchroniztion II (DS II). The m* = 10 cylinder witnesses a jump in the transverse displacement curve near the closure of lock-in. This interesting observation is found to be absent for m* = 1 cylinder. In the lock-in zone, the response curve is convex in nature for m* = 1 while it is concave for m* = 10 cylinder. For both m*, the locus of the cylinder center establishes the presence of quasi-periodicity in cylinder motion near the closure of lock-in. The extent of quasi-periodicity is higher for high m* case. The 2S mode of vortex shedding is present at the beginning of lock-in for both the m*.
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