Boundaries influence on the flow field around an oscillating sphere
This work analyzes the effects of the interaction between an oscillating sphere and free surface flows through the reconstruction of the flow field around the body and the analysis of the displacements. The experiments were performed in an open water channel, where the sphere had three different bou...
Published in: | Volume 7: CFD and VIV |
---|---|
Main Authors: | , , |
Other Authors: | , , |
Format: | Conference Object |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/11563/52842 https://doi.org/10.1115/OMAE2013-11385 |
id |
ftunivbasilicata:oai:iris.unibas.it:11563/52842 |
---|---|
record_format |
openpolar |
spelling |
ftunivbasilicata:oai:iris.unibas.it:11563/52842 2024-04-14T08:05:10+00:00 Boundaries influence on the flow field around an oscillating sphere MIRAUDA, DOMENICA Antonio Volpe Plantamura Stefano Malavasi Mirauda, Domenica Antonio Volpe, Plantamura Stefano, Malavasi 2013 http://hdl.handle.net/11563/52842 https://doi.org/10.1115/OMAE2013-11385 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000360868500074 ispartofbook:- Proceedings of the 32nd International Conference on Ocean, Offshore, and Arctic Engineering OMAE2013 volume:1 firstpage:1 lastpage:10 http://hdl.handle.net/11563/52842 doi:10.1115/OMAE2013-11385 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84893147189 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/conferenceObject 2013 ftunivbasilicata https://doi.org/10.1115/OMAE2013-11385 2024-03-21T17:31:42Z This work analyzes the effects of the interaction between an oscillating sphere and free surface flows through the reconstruction of the flow field around the body and the analysis of the displacements. The experiments were performed in an open water channel, where the sphere had three different boundary conditions in respect to the flow, defined as h* (the ratio between the distance of the sphere upper surface from the free surface and the sphere diameter). A quasi-symmetric condition at h*=2, with the sphere equally distant from the free surface and the channel bottom, and two conditions of asymmetric bounded flow, one with the sphere located at a distance of 0.003m from the bottom at h*=3.97 and the other with the sphere close to the free surface at h*=0, were considered. The sphere was free to move in two directions, streamwise (x) and transverse to the flow (y), and was characterized by values of mass ratio, m*=1.34 (ratio between the system mass and the displaced fluid mass), and damping ratio, ζ=0.004. The comparison between the results of the analyzed boundary conditions has shown the strong influence of the free surface on the evolution of the vortex structures downstream the obstacle. Conference Object Arctic Università degli Studi della Basilicata: CINECA IRIS Volume 7: CFD and VIV |
institution |
Open Polar |
collection |
Università degli Studi della Basilicata: CINECA IRIS |
op_collection_id |
ftunivbasilicata |
language |
English |
description |
This work analyzes the effects of the interaction between an oscillating sphere and free surface flows through the reconstruction of the flow field around the body and the analysis of the displacements. The experiments were performed in an open water channel, where the sphere had three different boundary conditions in respect to the flow, defined as h* (the ratio between the distance of the sphere upper surface from the free surface and the sphere diameter). A quasi-symmetric condition at h*=2, with the sphere equally distant from the free surface and the channel bottom, and two conditions of asymmetric bounded flow, one with the sphere located at a distance of 0.003m from the bottom at h*=3.97 and the other with the sphere close to the free surface at h*=0, were considered. The sphere was free to move in two directions, streamwise (x) and transverse to the flow (y), and was characterized by values of mass ratio, m*=1.34 (ratio between the system mass and the displaced fluid mass), and damping ratio, ζ=0.004. The comparison between the results of the analyzed boundary conditions has shown the strong influence of the free surface on the evolution of the vortex structures downstream the obstacle. |
author2 |
Mirauda, Domenica Antonio Volpe, Plantamura Stefano, Malavasi |
format |
Conference Object |
author |
MIRAUDA, DOMENICA Antonio Volpe Plantamura Stefano Malavasi |
spellingShingle |
MIRAUDA, DOMENICA Antonio Volpe Plantamura Stefano Malavasi Boundaries influence on the flow field around an oscillating sphere |
author_facet |
MIRAUDA, DOMENICA Antonio Volpe Plantamura Stefano Malavasi |
author_sort |
MIRAUDA, DOMENICA |
title |
Boundaries influence on the flow field around an oscillating sphere |
title_short |
Boundaries influence on the flow field around an oscillating sphere |
title_full |
Boundaries influence on the flow field around an oscillating sphere |
title_fullStr |
Boundaries influence on the flow field around an oscillating sphere |
title_full_unstemmed |
Boundaries influence on the flow field around an oscillating sphere |
title_sort |
boundaries influence on the flow field around an oscillating sphere |
publishDate |
2013 |
url |
http://hdl.handle.net/11563/52842 https://doi.org/10.1115/OMAE2013-11385 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000360868500074 ispartofbook:- Proceedings of the 32nd International Conference on Ocean, Offshore, and Arctic Engineering OMAE2013 volume:1 firstpage:1 lastpage:10 http://hdl.handle.net/11563/52842 doi:10.1115/OMAE2013-11385 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84893147189 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1115/OMAE2013-11385 |
container_title |
Volume 7: CFD and VIV |
_version_ |
1796301992541290496 |