Experimental investigation of the wave-induced flow around a surface-touching cylinder

Mattioli, Matteo; Mancinelli, Alessandro; Brocchini, Maurizio

doi:10.1016/j.jfluidstructs.2012.10.002

Cited by 37 publications

(15 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present study, calculations of turbulence parameters for wave-induced conditions were performed by phase-averaging of the velocity signal (Mattioli et al [40], Umeyama [9,10]).…”

Section: Data Processing and Analysismentioning

confidence: 99%

Turbulence characteristics of wave-blocking phenomena

Chatterjee

Mazumder

Ghosh

2018

Applied Ocean Research

View full text Add to dashboard Cite

This study explores experimentally the turbulent flow in a laboratory flume, interacting with waves propagated against the flow. It focuses a region of 'wave-blocking' for which there is a stream-wise location on the water surface, where the wave propagation velocity vanishes. The observations are corroborated by finding a critical wave frequency for a particular discharge above which the waves are effectively blocked; and verified by the dispersion relation of monochromatic wave. The counter-current propagating waves show an evolutionary change in the flow with three segmented regions, viz, flow at the upstream, blocking at the mid-stream and waves in the downstream. The instantaneous velocity data were collected using 3-D Micro-acoustic Doppler velocimeter (ADV) along the flume centerline. This study addresses the changes in the mean flows, Reynolds stresses, eddy viscosity, turbulence kinetic energy fluxes and associated contributions of burst-sweep cycles to the total Reynolds shear stress due to addition of surface waves against a current. The velocity power spectral analysis shows the energy distribution over the whole profile from upstream to downstream. The quadrant analysis is also used to highlight the turbulent event evolutions along the flow; and shows that at the waveblocking and wave dominated regions, the contributions from ejection and sweep to the total shear stress are dominant. The changes in turbulence key parameters due to waveblocking may affect the sediment transport in coastal region.

show abstract

“…In the present study, calculations of turbulence parameters for wave-induced conditions were performed by phase-averaging of the velocity signal (Mattioli et al [40], Umeyama [9,10]).…”

Section: Data Processing and Analysismentioning

confidence: 99%

Turbulence characteristics of wave-blocking phenomena

Chatterjee

Mazumder

Ghosh

2018

Applied Ocean Research

View full text Add to dashboard Cite

show abstract

“…The dependence on the burial depth is described in (11) by an exponential function, whose denominator is e 0 /D − 0.5. Such a formulation is clearly valid for cases where the burial depth is not larger than 0.5.…”

Section: Scour Depth In Clayey Soils With Large Clay-content Rangesmentioning

confidence: 99%

“…Understanding the flow that waves and currents induce around these pipelines is critical in assessing the loads that they experience (e.g. [11]) and in identifying necessary measures to ensure stability and safety (e.g. [4]).…”

Section: Introductionmentioning

confidence: 99%

Scour depth under pipelines placed on weakly cohesive soils

Postacchini

Brocchini

2015

Applied Ocean Research

View full text Add to dashboard Cite

“…Animation of tunnel erosion; video 3. Animation of lee-wake erosion) (animations have been extracted from scour experiments conducted by Mattioli et al [41]). …”

Section: Pipeline Affected By Local Seabed Erosionmentioning

confidence: 99%

Insights on the design of free-spanning pipelines

Drago

Mattioli

Bruschi

et al. 2015

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

The design of free-spanning pipelines is performed with the aim of ensuring their integrity against permanent loads generated by seabed roughness, functional loads induced by internal pressure and temperature, and dynamic loads induced by marine currents and direct wave action. In particular, a load and resistance factored design is applied that focuses on extreme environmental loads, and a fatigue limit state approach is applied as a consequence of free-span dynamics due to vortex shedding-induced vibration and direct wave action. The pipeline free-span scenario can be permanent, when generated by seabed roughness, or characterized by short- to long-term evolution, when generated by seabed mobility and scouring in shallow waters. Free-span analysis is generally a task involving a number of disciplines and should be carried out using a multidisciplinary approach. The paper illustrates various themes related to free-span analysis: (i) free-span scenarios, (ii) characterization of the environment from deep to shallow water related to proper seabed properties, (iii) hydrodynamic load regimes, (iv) pipeline free-span design assessment aiming to reduce overstress and fatigue damage, (v) erodible seabed mobility and local scour, and (vi) some experiences of inspection surveys chosen as representative of a free-spanning pipeline in sandy soils.

show abstract

Experimental investigation of the wave-induced flow around a surface-touching cylinder

Cited by 37 publications

References 34 publications

Turbulence characteristics of wave-blocking phenomena

Turbulence characteristics of wave-blocking phenomena

Scour depth under pipelines placed on weakly cohesive soils

Insights on the design of free-spanning pipelines

Contact Info

Product

Resources

About