Green water loads on FPSOs exposed to beam and quartering seas, Part II: CFD simulations

2017 ◽  
Vol 140 ◽  
pp. 434-452 ◽  
Author(s):  
Daniel F.C. Silva ◽  
Paulo T.T. Esperança ◽  
Alvaro L.G.A. Coutinho
Keyword(s):  
Green Water ◽  
Cfd Simulations ◽  
Quartering Seas

Green water loads on FPSOs exposed to beam and quartering seas, part I: Experimental tests

2017 ◽  
Vol 140 ◽  
pp. 419-433 ◽  
Author(s):  
Daniel F.C. Silva ◽  
Alvaro L.G.A. Coutinho ◽  
Paulo T.T. Esperança
Keyword(s):  
Experimental Tests ◽  
Green Water ◽  
Quartering Seas

Green Water Loads Determination for FPSO Exposed to Beam Sea Conditions

2014 ◽  
Author(s):  
Daniel Fonseca de Carvalho e Silva ◽  
Ronaldo Rosa Rossi
Keyword(s):  
Careful Analysis ◽  
Dam Break ◽  
Green Water ◽  
Cfd Simulations ◽  
Water On Deck ◽  
Special Boundary Condition ◽  
Global Result ◽  
Exploration And Production ◽  
Loads Analysis ◽  
Water Elevation

Considering new offshore frontiers for oil exploration and production, specially the Santos Basin region, FPSOs will be exposed to more severe wave conditions. This scenario requires careful analysis with respect to the green water phenomenon. The complex physics involved in the water-on-deck flow implies on several uncertainties regarding green water loads analysis. Taking into account model tests, CFD simulations and analytical formulations, this paper aims to simplify the green water loads determination, proposing a methodology to estimate these loads considering the water elevation above deck measured from experiments or numerical tools. In order to accomplish this objective, CFD simulations with different solvers were run for a benchmark case, showing that it is a suitable approach for a global result in impact dam break cases. After that, a special boundary condition was calibrated to represent model test results of water propagation in a FPSO deck exposed to beam sea in terms of water elevation. Using this CFD model, the loads on exposed structures was determined and compared against the dam break analytical formulation, which was modified to take into account the gap between each structure and the deck. Finally some vane type protection structures were simulated and their efficiency in partially obstructing the water-on-deck flow was evaluated. As a global result from all these analysis, a more comprehensive strategy for green water loads determination is proposed.

Fundamental green water study for head, beam and quartering seas for a simplified FPSO geosim using a mixed experimental and numerical approach

2015 ◽  
Vol 10 (2) ◽  
pp. 71-90 ◽  
Author(s):  
Felipe Ruggeri ◽  
Rafael A. Watai ◽  
Pedro Cardozo de Mello ◽  
Claudio Mueller P. Sampaio ◽  
Alexandre N. Simos ◽  
...  
Keyword(s):  
Numerical Approach ◽  
Green Water ◽  
Quartering Seas

Blue and green water use by irrigated crops

2014 ◽  
Author(s):  
International Food Policy Research Institute (IFPRI)
Keyword(s):  
Water Use ◽  
Green Water ◽  
Irrigated Crops

THE ROLE OF URBAN DESIGN IN TOKYO’S SHRINKING PERIPHERAL AREAS: THE CASE OF TAMA NEW TOWN

2018 ◽  
Vol 12 (1) ◽  
pp. 112 ◽  
Author(s):  
Marco Capitanio
Keyword(s):  
Urban Design ◽  
Spatial Organization ◽  
Urban Morphology ◽  
Green Water ◽  
Physical Factors ◽  
New Town ◽  
Existing Problems ◽  
Population Loss ◽  
Local Municipalities ◽  
Peripheral Areas

The aging of Japanese society will inevitably restructure Tokyo’s spatial organization in the coming decades. Population loss will manifest itself unevenly, being most dramatic in peripheral areas—where ca. 87% of Greater Tokyo Area’s population lives—triggering a gradual spatial restructuring. Several scholars have tackled this issue from a geographical and planning perspective. From an architect’s viewpoint, such researches build a theoretical foundation upon which a more concrete investigation should be done, since the question of how liveability at the architectural and urban design scale could be tackled remains an open one. This paper focuses on one representative case study: Tama New Town, some 30km west of Tokyo Station. The emphasis is on four liveability factors relating to urban morphology, embedded in a wider socio-economic context: density/compactness, diversity of uses, walkability and green/water space. The significance of the research is threefold. On a theoretical level, we have assessed how urban design physical factors impact liveability in Tokyo’s peripheral areas. On a methodological level, we have tested workable methods that can be used by architects and urban designers to analyze neighborhood liveability in both quantitative and qualitative terms. On a practical level, we have provided new data and information about Tama New Town for the use of local municipalities and groups, suggesting strategies to address existing problems and highlighting potentials to be exploited.

Computation of the Bow Deck Design Pressure against the Green Water Impact

2019 ◽  
Vol 56 (4) ◽  
pp. 343-351
Author(s):  
Yong Jig Kim ◽  
Ki-Seok Shin ◽  
Seung-Chul Lee ◽  
Youngrok Ha ◽  
Sa Young Hong
Keyword(s):  
Green Water ◽  
Water Impact ◽  
Design Pressure
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