[논문]Enhanced mixing downstream of a pile in an estuarine flow

Lass, H.U.; Mohrholz, V.; Knoll, M.; Prandke, H.

doi:10.1016/j.jmarsys.2008.04.003

[해외논문] Enhanced mixing downstream of a pile in an estuarine flow

Journal of marine systems : journal of the European Association of Marine Sciences and Techniques, v.74 no.1/2, 2008년, pp.505 - 527

Lass, H.U. (Institute of Baltic Sea Research Warnemunde, Seestrasse 15, 18119 Rostock, Germany) , Mohrholz, V. , Knoll, M. , Prandke, H.

Abstract ▼ AI-Helper

We studied the impact on stratification and mixing of a bridge pile in a stratified shear flow at the Western Bridge of the Great Belt Fixed Link, Denmark, in January and April 2006. Stratification was measured with high horizontal resolution by towed CTD chains and dissipation of turbulent kinetic energy was measured by a free-falling MSS 90 microstructure profiler equipped with shear probes. Background stratification and current were measured by standard CTD and a bottom-mounted ADCP, respectively. The spatial and temporal variability of the flow field close behind a single pile was measured by an ADCP mounted on a small catamaran tethered to this pile. A shear background flow of varying strength was observed with an inflow of up to 80 cm s-1 in the surface layer and an outflow of 10 cm s-1 in the bottom layer. The brackish surface layer was separated from the saline Kattegat water in the bottom layer by an intermediate layer resulting in a Brunt-Vaisala frequency of up to 100 cycles per hour (cph). The maximum Reynolds number (Re) and internal Froude number (Fr) were 4.6x106 and 1.3, respectively. Eddies occurred downstream of a pile with a characteristic diameter of the pile and a frequency corresponding to a von Karman vortex street when near-surface Fr > 0.7. Enhanced mixing was observed in the von Karman vortex streets, which caused an increase in salinity by a few psu in the surface mixed layer of the eddy up to 400 m downstream of the piles. Differential advection by cross-channel circulation smeared out laterally from the wakes' salinity anomalies and turbulence. The dissipation of turbulent kinetic energy in the intermediate layer increased by an order of magnitude downstream of the piles as a function of Fr when Fr > 0.7. This enhanced mixing reduced the mean potential energy anomaly downstream by some 10 Jm-3 in the upper 15 m depth and caused an upstream-directed baroclinic pressure gradient of the same order as the barotropic pressure gradient, which forced reversed flow in the bottom layer.

Keyword

참고문헌 (30)

J. Hydraulic Res. Arntsen 35 435 1998 10.1080/00221689709498404 Lee waves and hydrodynamical load due to the motion of a submerged horizontal circular cylinder in a three layer fluid

상세보기
Batchelor 1967 An Introduction to Fluid Dynamics
Ocean Dyn Burchard 2005 10.1007/s10236-005-0025-2 Dynamics of medium-intensity dense water plumes in the Arkona Basin, Western Baltic Sea

상세보기
Estuar. Coast. Shelf Sci Burchard 2007 A dynamic equation for the potential energy anomaly for analysing mixing and stratification in estuaries and coastal seas
Dyn. Atmos. Ocean. Chashechkin 34 165 2001 10.1016/S0377-0265(01)00066-5 Experimental study of a fine structure of 2D wakes and mixing past an obstacle in a continuously stratified fluid

상세보기
Ekman 1906 Norw. North Pol. Exp. 1893-1896 Sc. Res. Vol. V, XV On dead-water
Farmer 125 1990 The physical oceanography of sea straits Measurements and modelling in the Great Belt: a unique opportunity for model verification
Oceanologia Feistel 45 623 2003 Temporal and spatial evolution of the Baltic deep water renewal in spring 2003
Fennel 1989 Analytical theory of forced oceanic waves
Gill 662 1982 Atmosphere-Ocean Dynamics
Environ. Proc. HELCOM 16 1986 Water balance of the Baltic Sea. - Baltic Sea
J. Mar. Res. Heywood 48 55 1990 10.1357/002224090784984623 The effect of flow disturbance by an oceanic island
Dyn. Atmos. Ocean. Holford 30 173 1999 10.1016/S0377-0265(99)00025-1 Turbulent mixing in a stratified fluid

상세보기
Jacobsen 1980 The Belt Project, Nat. Agency Environ. Prot., Copenhagen Sea water exchange of the Baltic measurements and methods
J. Geophys. Res. Lass 108 3042 2003 10.1029/2002JC001465 On the dynamics and mixing of inflowing salt-water in the Arkona Sea

상세보기
J. Geophys. Res. Lass 110 C11019 2005 10.1029/2004JC002848 On the pathways and residence time of saltwater plumes in the Arkona Sea

상세보기
J. Geophys. Res. Liljebladh 101 No. C4 8895 1996 10.1029/95JC03303 Observations of the deepwater flow into the Baltic Sea

상세보기
J. Phys. Oceanogr. McComas 11 139 1981 10.1175/1520-0485(1981)011<0139:TSORIA>2.0.CO;2 Time scales of resonant interactions among oceanic internal waves

상세보기
Cont. Shelf Res. Matthaus 12 1375 1992 10.1016/0278-4343(92)90060-W Characteristics of major Baltic inflows - a statistical analysis

상세보기
J. Mar. Environ. Eng. Moeller 4 97 1997 Mixing in stratified flow caused by obstacles
J. Phys. Oceanogr. Osborn 10 83 1980 10.1175/1520-0485(1980)010<0083:EOTLRO>2.0.CO;2 Estimates of the local rate of vertical diffusion from dissipation measurements

상세보기
Ottesen-Hansen 153 1989 The physical oceanography of sea straits Zero blocking solution for the Great Belt Link
J. Wind Eng. Ind. Aerodyn. Ozono 67&68 103 1997 10.1016/S0167-6105(97)00066-4 Stably stratified flow around a horizontal rectangular cylinder in a channel of finite depth

상세보기
Prandke 2000 MITEC Report Technical Note No. I.96.87, European Commission, Joint Research Centre, Space Applications Institute, Ispra/Italy
Deep-Sea-Res. I, Sellschopp 44 147 1997 10.1016/S0967-0637(96)00087-8 A towed CTD chain for two-dimensional high resolution hydrography

상세보기
Cont. Shelf Res. Sellschopp 26 2393 2006 10.1016/j.csr.2006.07.004 Direct observations of a medium-intensity inflow into the Baltic Sea

상세보기
Phil. Trans. R. Soc. Lond. A Simpson 302 531 1981 10.1098/rsta.1981.0181 The shelf sea fronts: implication of their existence and behaviour

상세보기
Geophys. Res. Lett. Umlauf 34 L08601 2007 10.1029/2007GL029521 The transverse structure of turbulence in a rotating gravity current

상세보기
Dt. Hydrogr. Z. Wyrtki 7 91 1954 10.1007/BF02019548 Schwankungen im Wasserhaushalt der Ostsee

상세보기
Phys. Fluids Xu 7-9 2243 1995 10.1063/1.868472 Turbulent wakes of stratified flow past a cylinder

상세보기

활용도 분석정보

상세보기

다운로드

내보내기

활용도 Top5 논문

해당 논문의 주제분야에서 활용도가 높은 상위 5개 콘텐츠를 보여줍니다.
더보기 버튼을 클릭하시면 더 많은 관련자료를 살펴볼 수 있습니다.

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

[해외논문] Enhanced mixing downstream of a pile in an estuarine flow

Abstract ▼ AI-Helper

Keyword

참고문헌 (30)

이 논문을 인용한 문헌

활용도 분석정보

활용도 Top5 논문

관련 콘텐츠

원문 URL 링크

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

연합인증

[해외논문] Enhanced mixing downstream of a pile in an estuarine flow

Abstract ▼ AI-Helper

Keyword

참고문헌 (30)

이 논문을 인용한 문헌

활용도 분석정보

활용도 Top5 논문 더보기

관련 콘텐츠

원문 URL 링크

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

활용도 Top5 논문