Author:
NEWMAN DAVID J.,KARNIADAKIS GEORGE EM
Abstract
We present simulation results of flow-induced vibrations of an
infinitely long flexible
cable at Reynolds numbers Re = 100 and Re = 200,
corresponding to laminar and
early transitional flow states, respectively. The question as to what
cable motions and
flow patterns prevail is investigated in detail. Both standing wave
and travelling wave
responses are realized but in general the travelling wave is the preferred response.
A standing wave cable response produces an interwoven pattern of vorticity, while a
travelling wave cable response produces oblique vortex shedding. A sheared inflow
produces a mixed standing wave/travelling wave cable response and chevron-like
patterns with vortex dislocations in the wake. The lift force on the
cable as well as its
motion amplitudes are larger for the standing wave response. At Re = 200,
the cable and wake response are no longer periodic, and the maximum
amplitude of the cable
is about one cylinder diameter, in agreement with experimental results.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
208 articles.
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