Numerical Investigation of the Flow Features around Heave Plates Oscillating Close to a Free Surface or Seabed

Garrido Mendoza, Carlos Ariel and Thiagarajan, K.P. and Souto Iglesias, Antonio and Bouscasse, Benjamin and Colagrossi, A. (2014). Numerical Investigation of the Flow Features around Heave Plates Oscillating Close to a Free Surface or Seabed. In: "Symposium on Ocean Technology", 08/06/2014 - 13/06/2014, San Francisco, California, USA. ISBN 978-0-7918-4549-3. pp. 1-11. https://doi.org/10.1115/OMAE2014-23818.

Description

Title: Numerical Investigation of the Flow Features around Heave Plates Oscillating Close to a Free Surface or Seabed
Author/s:
  • Garrido Mendoza, Carlos Ariel
  • Thiagarajan, K.P.
  • Souto Iglesias, Antonio
  • Bouscasse, Benjamin
  • Colagrossi, A.
Item Type: Presentation at Congress or Conference (Article)
Event Title: Symposium on Ocean Technology
Event Dates: 08/06/2014 - 13/06/2014
Event Location: San Francisco, California, USA
Title of Book: ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
Date: 2014
ISBN: 978-0-7918-4549-3
Volume: 7
Subjects:
Faculty: E.T.S.I. Navales (UPM)
Department: Arquitectura y Construcción Navales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Performance of heave plates used in offshore structures is strongly influenced by their added mass and damping, which are affected by proximity to a boundary. A previous paper by the authors presented numerical simulations of the flow around a circular solid disk oscillating at varying elevations from seabed [1]. The force calculated was used to evaluate the added mass and damping coefficients for the disk. The simulations suggest that as the structure moves closer to the seabed the added mass and damping coefficients (Ca and Cb) increases continuously. In order to understand the physics behind the added mass and damping trends, when a heave plate is moving near a seabed or closer to the free surface, the flow characteristics around the heave plate are examined numerically in this paper. Flow around oscillating disks is dominated by generation and development of phase-dependent vortical structures, characterized by the KC number and the distance from the seabed or free surface to the heave plate. Numerical calculations presented in this paper have comprised the qualitative analysis of the vortex shedding and the investigation of the links between such vortex shedding and, on one hand the damping coefficient, and on the other hand, pairing mechanisms such as the shedding angle.

More information

Item ID: 34749
DC Identifier: http://oa.upm.es/34749/
OAI Identifier: oai:oa.upm.es:34749
DOI: 10.1115/OMAE2014-23818
Official URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1911984
Deposited by: Memoria Investigacion
Deposited on: 24 Apr 2015 10:11
Last Modified: 24 Apr 2015 10:11
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