Hydrodynamic Forces Exerting on an Oscillating Cylinder under Translational Motion in Water Covered by Compressed Ice
Article
Article Title | Hydrodynamic Forces Exerting on an Oscillating Cylinder under Translational Motion in Water Covered by Compressed Ice |
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ERA Journal ID | 123718 |
Article Category | Article |
Authors | Stepanyants Yury and Sturova, Izolda |
Journal Title | Water: an open access journal |
Journal Citation | 13 (6) |
Article Number | 822 |
Year | 2021 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 2073-4441 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/w13060822 |
Web Address (URL) | https://www.mdpi.com/2073-4441/13/6/822 |
Abstract | This paper presents the calculation of the hydrodynamic forces exerted on an oscillating circular cylinder when it moves perpendicular to its axis in infinitely deep water covered by compressed ice. The cylinder can oscillate both horizontally and vertically in the course of its translational motion. In the linear approximation, a solution is found for the steady wave motion generated by the cylinder within the hydrodynamic set of equations for the incompressible ideal fluid. It is shown that, depending on the rate of ice compression, both normal and anomalous dispersion can occur in the system. In the latter case, the group velocity can be opposite to the phase velocity in a certain range of wavenumbers. The dependences of the hydrodynamic loads exerted on the cylinder (the added mass, damping coefficients, wave resistance and lift force) on the translational velocity and frequency of oscillation were studied. It was shown that there is a possibility of the appearance of negative values for the damping coefficients at the relatively big cylinder velocity; then, the wave resistance decreases with the increase in cylinder velocity. The theoretical results were underpinned by the numerical calculations for the real parameters of ice and cylinder motion. |
Keywords | Added mass; Damping coefficient; Deep water; Hydrodynamic load; Ice cover; Ideal fluid; Moving cylinder; Wave resistance |
ANZSRC Field of Research 2020 | 510399. Classical physics not elsewhere classified |
490109. Theoretical and applied mechanics | |
Funder | Ministry of Education and Science of the Russian Federation |
Byline Affiliations | School of Sciences |
Nizhny Novgorod State Technical University, Russia | |
Lebedev Institute of the Russian Academy of Sciences |
https://research.usq.edu.au/item/w3q19/hydrodynamic-forces-exerting-on-an-oscillating-cylinder-under-translational-motion-in-water-covered-by-compressed-ice
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