Subcritical flow past a circular cylinder surrounded by a porous layer

M. P. Sobera; C. R. Kleijn; H. A. Van den Akker

doi:10.1063/1.2189284

Subcritical flow past a circular cylinder surrounded by a porous layer

M. P. Sobera, C. R. Kleijn, H. A. Van den Akker

Delft University of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

A study of the flow at subcritical Re=3900 around a circular cylinder, surrounded at some fixed small distance by a porous layer with a hydraulic resistance typical for that of textile materials, has been performed by means of direct numerical simulations. The flow in the space between the porous layer and the solid cylinder was found to be laminar and periodic, with a frequency locked to that of the vortex shedding in the wake behind the cylinder. Time averaged flow velocities underneath the porous material were in good agreement with experimental data from laser Doppler anemometry.

Original language	English
Article number	038106
Journal	Physics of Fluids
Volume	18
Issue number	3
DOIs	https://doi.org/10.1063/1.2189284
Publication status	Published - Mar 2006
Externally published	Yes

Keywords

External flows
Flow instability
Flow simulation
Flow through porous media
Laminar to turbulent transitions
Pulsatile flow
Vortices
Wakes

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10.1063/1.2189284

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abstract = "A study of the flow at subcritical Re=3900 around a circular cylinder, surrounded at some fixed small distance by a porous layer with a hydraulic resistance typical for that of textile materials, has been performed by means of direct numerical simulations. The flow in the space between the porous layer and the solid cylinder was found to be laminar and periodic, with a frequency locked to that of the vortex shedding in the wake behind the cylinder. Time averaged flow velocities underneath the porous material were in good agreement with experimental data from laser Doppler anemometry.",

keywords = "External flows, Flow instability, Flow simulation, Flow through porous media, Laminar to turbulent transitions, Pulsatile flow, Vortices, Wakes",

author = "Sobera, {M. P.} and Kleijn, {C. R.} and {Van den Akker}, {H. A.}",

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AB - A study of the flow at subcritical Re=3900 around a circular cylinder, surrounded at some fixed small distance by a porous layer with a hydraulic resistance typical for that of textile materials, has been performed by means of direct numerical simulations. The flow in the space between the porous layer and the solid cylinder was found to be laminar and periodic, with a frequency locked to that of the vortex shedding in the wake behind the cylinder. Time averaged flow velocities underneath the porous material were in good agreement with experimental data from laser Doppler anemometry.

KW - External flows

KW - Flow instability

KW - Flow simulation

KW - Flow through porous media

KW - Laminar to turbulent transitions

KW - Pulsatile flow

KW - Vortices

KW - Wakes

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VL - 18

JO - Physics of Fluids

JF - Physics of Fluids

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ER -

Subcritical flow past a circular cylinder surrounded by a porous layer

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Keywords

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