Towed underwater PIV measurement for free-surface effects on turbulent wake of a surface-piercing body

Seol, Dong Myung; Seo, Jang‐Kyun; Rhee, Shin Hyung

doi:10.3744/jnaoe.2013.5.3.404

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…Yao et al [46] applied PIV to determine the turbulence created by a grid placed inside a free surface channel. Seol et al [47] used towed underwater PIV to determine the water vertical and horizontal velocity fields behind a floating body, in order to characterize the turbulent wake and the influence that free surface has on it. To demonstrate that image velocimetry can be successfully used to characterize relatively large free surface flows (like rivers), Muste et al [48] performed laboratory measurements on a 3.4 m wide and approximately 23.5 m long free surface channel combining PIV with controlled surface wave image velocimetry in order to adapt the management of sediments at a river water intake.…”

Section: Assessment and Analysis Of Behavioral Barriersmentioning

confidence: 99%

Experimental Study of a Fish Behavioral Barrier Based on Bubble Curtains for a River Water Intake

Circiumaru,

Chihaia,

El-Leathey

et al. 2024

Environmental Sciences

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The protection of fish habitat near water diversion or hydrotechnical facilities is of particular interest for researchers working in various fields. The chapter is focused on an experimental study of a fish behavioral barrier consisting of a bubble curtain operating along a river water intake scale model. It approaches elements of fish hydrodynamics, river water intakes, as well as physical and non-physical barriers for fish diversion from hydrotechnical facilities. The design, development, and testing of the fish behavioral barrier as well as the results of the experimental analysis are discussed. The proposed experimental setup was based on a barrier placed in the proximity of a river water intake scale model fitted and tested in a closed-circuit hydraulic stand. The intake chamber is provided with perforated orifices which communicate through an inlet with a lower tank for discharging the water into another tank located beneath. A certain water velocity within the hydraulic stand was set to assess the tandem operation of the bubble curtain and water intake. A sharp velocity gradient was found in most cases, indicating local velocity changes and creating the premises for impacting the fish behavior. Conclusions and future research development are also envisaged in the chapter.

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Section: Assessment and Analysis Of Behavioral Barriersmentioning

confidence: 99%

Experimental Study of a Fish Behavioral Barrier Based on Bubble Curtains for a River Water Intake

Circiumaru,

Chihaia,

El-Leathey

et al. 2024

Environmental Sciences

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“…For a single towing carriage run, 250 particle image pairs were acquired and Reynolds averaged to derive two in-plane components of the average velocity, two normal components of the Reynolds stresses, and one shear component. An uncertainty assessment of the PIV system, based on the uniform flow results (Seol et al, 2013), is reported in Table 1.…”

Section: Testing Facility Equipment and Data Acquisitionmentioning

confidence: 99%

Turbulent wake field reconstruction of VLCC models using two-dimensional towed underwater PIV measurements

et al. 2016

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In the present study, the wake fields of two full ship models were measured using a twodimensional (2D) towed underwater particle image velocimetry (PIV) system to identify the flow characteristics around a hull with a high block coefficient. The 2D PIV measurements and reconstructing the three-dimensional (3D) flow field by stacking the 2D measurements were validated and applied to the model ship wakes in a towing tank. The bare hull wake was measured for a very large crude oil carrier (VLCC) model, KVLCC2, at a Froude number of 0.142 based on the length between perpendiculars (L PP ). These measurements were compared with those of five-hole Pitot tubes, a Pitot-static tube, and hot-wire anemometers for validation. After the validation tests, the nominal wake field of a generic VLCC model with a Froude number of 0.145 based on L PP was measured. To identify the effects of a rudder and rotating propeller on the mean velocity and turbulence characteristics, a 3D reconstruction was carried out for the generic VLCC model under self-propulsion conditions.

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“…(Gui, et al, 2001), 파랑 중에 놓인 동일 모형의 위상별 선미 유동장 계 측 (Longo, et al, 2007), 수면 관통 물체 주위의 유동장 계측 (Seol, et al, 2013)이 수행되었다. 그리고 두 대의 카메라를 이용해 2차원 평면의 3차원 속도 성 분을 얻어낼 수 있는 스테레오스코픽 입자영상유속계(sereo prticle iage vlocimetry, SPIV)가 예인수조에 도입되어 활용되었 다.…”

Section: 대한조선학회논문집 제 51 권 제 4 호 2014년 8월unclassified

Uncertainty Assessment of a Towed Underwater Stereoscopic PIV System

Seo¹,

Seol²,

Han³

et al. 2014

Journal of the Society of Naval Architects of Korea

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Towed underwater PIV measurement for free-surface effects on turbulent wake of a surface-piercing body

Abstract: ABSTRACT:In the present study, a towed underwater particle image velocimetry (PIV)

Cited by 3 publications

References 13 publications

Experimental Study of a Fish Behavioral Barrier Based on Bubble Curtains for a River Water Intake

Experimental Study of a Fish Behavioral Barrier Based on Bubble Curtains for a River Water Intake

Turbulent wake field reconstruction of VLCC models using two-dimensional towed underwater PIV measurements

Uncertainty Assessment of a Towed Underwater Stereoscopic PIV System

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