Fast numerical simulation of vortex shedding in tube arrays using a discrete vortex method

Sweeney, C.; Meskell, Craig

doi:10.1016/j.jfluidstructs.2003.08.009

Cited by 18 publications

(6 citation statements)

References 26 publications

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“…Whereas numerous studies are devoted to macroscopic cylinder arrays (Ziada 2006;Sweeney and Meskell 2003), fluidics aspects involved in the corresponding microscale analog of flow past cylindrical arrangements have rarely been addressed in the literature. The compact nature of the microfluidic geometry allows fitting, several thousands of confined micropins in a small area.…”

Section: Introductionmentioning

confidence: 99%

Vortex shedding from confined micropin arrays

Renfer

Tiwari

Meyer

et al. 2013

Microfluid Nanofluid

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The hydrodynamics in microcavities populated with cylindrical micropins was investigated using dynamic pressure measurements and fluid pathline visualization. Pressure signals were Fourier-analyzed to extract the flow fluctuation frequencies, which were in the kHz range for the tested flow Reynolds numbers (Re) of up to 435. Three different sets of flow dependent characteristic frequencies were identified, the first due to vortex shedding, the second due to lateral flow oscillation and the third due to a transition between these two flow regimes. These frequencies were measured at different locations along the chip (e.g. inlet, middle and outlet). It is established that vortex shedding initiates at the outlet and then travels upstream with increase in Re. The pathline visualization technique provided direct optical access to the flow field without any intermediate post-processing step and could be used to interpret the frequencies determined through pressure measurements. Microcavities with different micropin height-to-diameter aspect ratios and pitch-to-diameter ratios were tested. The tests confirmed an increase in the Strouhal number (associated with the vortex shedding) with increased confinement (decrease in the aspect ratio or the pitch), in agreement with macroscale measurements. The compact nature of the microscale geometry tested, and the measurement technique demonstrated, readily enabled us to investigate the flow past 4,420 pins with various degrees of confinements; this makes the measurements performed and the techniques developed here an important tool for investigating large arrays of similar objects in a flow field.

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Section: Introductionmentioning

confidence: 99%

Vortex shedding from confined micropin arrays

Renfer

Tiwari

Meyer

et al. 2013

Microfluid Nanofluid

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“…They also studied the flow past a single row of cylinders in the same range of Reynolds numbers. Sweeney and Meskell (2003) used a discrete vortex method to simulate vortex-shedding in tube arrays for Re ¼2200, whereas Huang et al (2006) used a commercial solver (FLUENT) for the numerical simulation of flow around rows of cylinders for Re r100. Lam et al (2006) conducted a numerical simulation of cross-flow past a row of rigid and flexible cylinders at Re ¼2.67 Â 10 4 .…”

Section: Introductionmentioning

confidence: 99%

Numerical study of aperiodic phenomena past two staggered rows of cylinders in cross-flow

Anagnostopoulos

Seitanis

2014

Ocean Engineering

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“…Unlike traditional grid-based CFD techniques, such as finite volume, finite difference or finite element, the vortex method approach has demonstrated sufficient accuracy over a range of applications (Sweeney and Meskell, 2003;Price, 2003, 2005), as well as being computationally efficient so that results can be obtained relatively quickly. These factors combined have led to a number of researchers being able to apply the vortex method to real designs, with the numerical procedure used very successfully as a design tool within bridge deck design procedures (Larsen and Walther, 1997;MacKenzie et al, 2002;Vejrum et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation into the aerodynamic characteristics and aeroelastic stability of a footbridge

Taylor

Vezza

2009

Journal of Fluids and Structures

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The results of a numerical investigation into the aerodynamic characteristics and aeroelastic stability of a proposed footbridge across a highway in the north of England are presented. The longer than usual span, along with the unusual nature of the pedestrian barriers, indicated that the deck configuration was likely to be beyond the reliable limits of the British design code BD 49/01. The calculations were performed using the discrete vortex method, DIVEX, developed at the Universities of Glasgow and Strathclyde. DIVEX has been successfully validated on a wide range of problems, including the aeroelastic response of bridge deck sections. In particular, the investigation focussed on the effects of non-standard pedestrian barriers on the structural integrity of the bridge. The proposed deck configuration incorporated a barrier comprised of angled flat plates, and the bridge was found to be unstable at low wind speeds with the plates having a strong turning effect on the flow at the leading edge of the deck. These effects are highlighted in both a static and dynamic analysis of the bridge deck, along with modifications to the design that aim to improve the aeroelastic stability of the deck. Proper orthogonal decomposition (POD) was also used to investigate the unsteady pressure field on the upper surface of the static bridge deck. The results of the flutter investigation and the POD analysis highlight the strong influence of the pedestrian barriers on the overall aerodynamic characteristics and aeroelastic stability of the bridge

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Fast numerical simulation of vortex shedding in tube arrays using a discrete vortex method

Cited by 18 publications

References 26 publications

Vortex shedding from confined micropin arrays

Vortex shedding from confined micropin arrays

Numerical study of aperiodic phenomena past two staggered rows of cylinders in cross-flow

A numerical investigation into the aerodynamic characteristics and aeroelastic stability of a footbridge

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