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Michael S. Triantafyllou. Davis, Joshua Tolford, 1978- Massachusetts Institute of Technology. Dept. of Ocean Engineering. Massachusetts Institute of Technology. Department of Ocean Engineering 2005-05-19T14:37:30Z 2005-05-19T14:37:30Z 2001 2001 http://hdl.handle.net/1721.1/16796 50406166 Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2001. Includes bibliographical references (leaves 100-102). This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. This thesis describes the results of over 2000 experimental runs conduced at the MIT Ship Model Testing Tank. A rake of constant temperature anemometers is employed to study the spanwise velocity correlation and the vertical velocity profile downstream of a vibrating cylinder. Experiments involve either free vibration implemented through a force feedback system or forced sinusoidal motion. All experiments are conducted at a towing speed within the subcritical flow regime at Re ~ 3 x 104. This thesis explores the connection between these downstream velocity properties and the vortex-induced vibrations of the cylinder. In addition to downstream velocities, experimental data include lift and drag forces and cylinder displacement. Vortices are found to be correlated along the entire length of the test cylinder only within a specific band of motion amplitudes and frequencies. Overall, forced oscillations produce vortices that are more organized and well correlated than those shed from a freely vibrating cylinder. by Joshua Tolford Davis. S.M. 102 leaves 8283176 bytes 8282888 bytes application/pdf application/pdf eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Ocean Engineering. Velocity characteristics in the wake of an oscillating cylinder Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="9f8d6551-95f7-4bc0-9077-91519952831e"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Velocity characteristics in the wake of an oscillating cylinder</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2001</PublicationDate> <Authors> <Author> <DisplayName>Davis, Joshua Tolford, 1978-</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Ocean Engineering.</Keyword> <Abstract>This thesis describes the results of over 2000 experimental runs conduced at the MIT Ship Model Testing Tank. A rake of constant temperature anemometers is employed to study the spanwise velocity correlation and the vertical velocity profile downstream of a vibrating cylinder. Experiments involve either free vibration implemented through a force feedback system or forced sinusoidal motion. All experiments are conducted at a towing speed within the subcritical flow regime at Re ~ 3 x 104. This thesis explores the connection between these downstream velocity properties and the vortex-induced vibrations of the cylinder. In addition to downstream velocities, experimental data include lift and drag forces and cylinder displacement. Vortices are found to be correlated along the entire length of the test cylinder only within a specific band of motion amplitudes and frequencies. Overall, forced oscillations produce vortices that are more organized and well correlated than those shed from a freely vibrating cylinder.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>