scholarly journals A BEM for the Hydrodynamic Analysis of Oscillating Water Column Systems in Variable Bathymetry

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3403 ◽  
Author(s):  
Kostas Belibassakis ◽  
Alexandros Magkouris ◽  
Eugen Rusu
Keyword(s):  
Boundary Element Method ◽  
Water Column ◽  
Black Sea ◽  
Bottom Topography ◽  
The Black Sea ◽  
Device Performance ◽  
Oscillating Water Column ◽  
Energy Potential ◽  
Hydrodynamic Analysis

In this work, a novel Boundary Element Method (BEM) is developed and applied to the investigation of the performance of Oscillating Water Column (OWC) systems, taking into account the interaction of the incident wave field with the bottom topography. The modelling includes the effect of additional upwave walls and barriers used to modify the resonance characteristics of the device and improve its performance as the U-OWC configuration. Numerical results illustrating the effects of depth variation in conjunction with other parameters—such as chamber dimensions as well as the parameters associated with the turbine and power take-off system—on the device performance are presented and discussed. Finally, a case study is presented regarding the potential installation of an OWC in a selected port site in the Black Sea, characterized by a good wave energy potential, on the coast of Romania.

scholarly journals Niche partitioning of bacterial communities along the stratified water column in the Black Sea

2021 ◽  
Vol 10 (3) ◽  
Author(s):  
Mariia Pavlovska ◽  
Ievgeniia Prekrasna ◽  
Evgen Dykyi ◽  
Andrii Zotov ◽  
Artem Dzhulai ◽  
...  
Keyword(s):  
Water Column ◽  
Black Sea ◽  
Bacterial Communities ◽  
Niche Partitioning ◽  
The Black Sea

Wave energy potential and variability for the south west coasts of the Black Sea: The WEB-based wave energy atlas

2020 ◽  
Vol 154 ◽  
pp. 136-150 ◽  
Author(s):  
Bilal Bingölbali ◽  
Halid Jafali ◽  
Adem Akpınar ◽  
Serkan Bekiroğlu
Keyword(s):  
Black Sea ◽  
Wave Energy ◽  
The Black Sea ◽  
The South ◽  
Energy Potential ◽  
Web Based ◽  
South West ◽  
The Web

Epipelic and Epipsammic Microalgae Responses to Environmental Parameters: The Black Sea Case Study (Gulf of Odesa, Ukraine)

2021 ◽  
Vol 23 (4) ◽  
pp. 377-394
Author(s):  
A. A. Snigirova ◽  
S. О. Sylantyev ◽  
О. Yu. Goncharov ◽  
A. V. Koshelev
Keyword(s):  
Black Sea ◽  
Environmental Parameters ◽  
The Black Sea

scholarly journals ANALYZING FLOW ENERGY POTENTIAL OF THE BOSPHORUS STRAIT

2018 ◽  
pp. 76
Author(s):  
Mehmet Özturk ◽  
Cihan Sahin ◽  
Yalcin Yuksel
Keyword(s):  
Black Sea ◽  
Lower Layer ◽  
The Black Sea ◽  
Sea Of Marmara ◽  
Energy Potential ◽  
Flow Energy ◽  
Strong Current ◽  
Layered Flow ◽  
Current Flows ◽  
Current Energy

Ocean currents represent a potentially notable, currently untapped, reservoir of energy. The regions with strong current velocities such as narrow straits connecting two water bodies exhibit high current energy (power) potential especially where the water depths are relatively shallow (EECA, 2009). The Bosphorus, connecting the Black Sea to the Sea of Marmara, is a typical narrow sea strait that generally exhibits a two-layered flow pattern: the upper layer current flows south towards the Sea of Marmara while the underlying current flows in opposite direction towards the Black Sea (Yüksel et al., 2008). The predominant mechanisms for the upper and lower layer flows are the higher water level of the Black Sea and the denser water of the Sea of Marmara, respectively.

Modeling the distribution of nitrogen species and isotopes in the water column of the Black Sea

2008 ◽  
Vol 111 (1-2) ◽  
pp. 106-124 ◽  
Author(s):  
S.K. Konovalov ◽  
C.A. Fuchsman ◽  
V. Belokopitov ◽  
J.W. Murray
Keyword(s):  
Water Column ◽  
Black Sea ◽  
The Black Sea ◽  
Nitrogen Species

scholarly journals Control of the geomorphology and gas hydrate extent on widespread gas emissions offshore Romania

2017 ◽  
Vol 188 (4) ◽  
pp. 26 ◽  
Author(s):  
Vincent Riboulot ◽  
Antonio Cattaneo ◽  
Carla Scalabrin ◽  
Arnaud Gaillot ◽  
Gwénaël Jouet ◽  
...  
Keyword(s):  
Water Column ◽  
Black Sea ◽  
Gas Hydrate ◽  
Accumulation Rate ◽  
Sediment Accumulation ◽  
The Black Sea ◽  
North East ◽  
Bottom Simulating Reflectors ◽  
Gas Flares ◽  
Sea Fan

The Romanian sector of the Black Sea deserves attention because the Danube deep-sea fan is one of the largest sediment depositional systems worldwide and is considered the world's most isolated sea, the largest anoxic water body on the planet and a unique energy-rich sea. Due to the high sediment accumulation rate, presence of organic matter and anoxic conditions, the Black sea sediments offshore the Danube delta is rich in gas and thus shows Bottom Simulating Reflectors (BSR). The cartography of the BSR over the last 20 years, exhibits its widespread occurrence, indicative of extensive development of hydrate accumulations and a huge gas hydrate potential. By combining old and new datasets acquired in 2015 during the GHASS expedition, we performed a geomorphological analysis of the continental slope north-east of the Danube canyon compared with the spatial distribution of gas seeps in the water column and the predicted extent of the gas hydrate stability zone. This analysis provides new evidence of the role of geomorphological setting and gas hydrate extent in controlling the location of the observed gas expulsions and gas flares in the water column. Gas flares are today considered an important source of the carbon budget of the oceans and, potentially, of the atmosphere.

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