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

Garrido Mendoza, Carlos Ariel; Thiagarajan, K.P.; Souto Iglesias, Antonio; Bouscasse, Benjamin y Colagrossi, A. (2014). Numerical Investigation of the Flow Features around Heave Plates Oscillating Close to a Free Surface or Seabed. En: "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.

Descripción

Título: Numerical Investigation of the Flow Features around Heave Plates Oscillating Close to a Free Surface or Seabed
Autor/es:
  • Garrido Mendoza, Carlos Ariel
  • Thiagarajan, K.P.
  • Souto Iglesias, Antonio
  • Bouscasse, Benjamin
  • Colagrossi, A.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Symposium on Ocean Technology
Fechas del Evento: 08/06/2014 - 13/06/2014
Lugar del Evento: San Francisco, California, USA
Título del Libro: ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
Fecha: 2014
ISBN: 978-0-7918-4549-3
Volumen: 7
Materias:
Escuela: E.T.S.I. Navales (UPM)
Departamento: Arquitectura y Construcción Navales [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 34749
Identificador DC: http://oa.upm.es/34749/
Identificador OAI: oai:oa.upm.es:34749
Identificador DOI: 10.1115/OMAE2014-23818
URL Oficial: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1911984
Depositado por: Memoria Investigacion
Depositado el: 24 Abr 2015 10:11
Ultima Modificación: 24 Abr 2015 10:11
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