Documents published in Scipedia

• D2.2 First release of the octree mesh-generation capabilities and of the parallel mesh adaptation kernel

  A. Martín, L. Cirrottola, A. Froehly, R. Rossi, C. Soriano

  Open Access Repository of the ExaQUte project: Deliverables (2021). 2

  
  

  Abstract

  This document presents a description of the octree mesh-generation capabilities and of the parallel mesh adaptation kernel. As it is discussed in Section 1.3.2 of part B of the project proposal there are two parallel research lines aimed at developing scalable adaptive mesh refinement (AMR) algorithms and implementations. The first one is based on using octree-based mesh generation and adaptation for the whole simulation in combination with unfitted finite element methods (FEMs) and the use of algebraic constraints to deal with non-conformity of spaces. On the other hand the second strategy is based on the use of an initial octree mesh that, after make it conforming through the addition of templatebased tetrahedral refinements, is adapted anisotropically during the calculation. Regarding the first strategy the following items are included: Description of the octree-based AMR kernel with space-filling curves. Description of a outer, wrapping AMR layer supporting FEM needs. Numerical results in a distributed environment. Regarding the second strategy the following items are included: An outline of the anisotropic mesh adaptation algorithm. A description of the state of the art of the implementation. A discussion on the ongoing and future work.

  Abstract
  This document presents a description of the octree mesh-generation capabilities and of the parallel mesh adaptation kernel. As it is discussed in Section 1.3.2 of part B of [...]

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• D1.2 First realease of the softwares

  R. Tosi, R. Amela, M. Nuñez, C. Roig, R. Badia, R. Rossi, C. Soriano

  Open Access Repository of the ExaQUte project: Deliverables (2021). 1

  
  

  Abstract

  This deliverable presents the software release of the Kratos Multiphysics software [3], ”a framework for building parallel, multi-disciplinary simulation software, aiming at modularity, extensibility, and high performance. Kratos is written in C++, and counts with an extensive Python interface”. In this deliverable we focus on the development of Uncertainty Quantification inside Kratos. This takes place in the MultilevelMonteCarloApplication, a recent development inside the software that allows to deal with uncertainty quantification.

  Abstract
  This deliverable presents the software release of the Kratos Multiphysics software [3], ”a framework for building parallel, multi-disciplinary simulation software, aiming [...]

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• Is the utilization of methane gas, the sollution of air pollution in difuse sectors?. The case of port of Castellón

  X. Osés, J. Gil

  (2011). REACT 2011 Proceedings, pp. 110-114

  
  

  Abstract

  Within an scenario of highly sensitivity on environmental questions, followed by an international regulation body, that is restricting the emission levels from ships in ports with the future possibilit y of more stringent local regulations; the challenge for the world’s fleet are not only technical but economic and logistical. From one side, there are different technical alternatives affording to accomplish the nowadays international regulations. Even avoiding on board modifications, the owner can decide to use low sulphur content fuels, together with slight changes in engines to reduce the levels of nitrogen oxides. But the question posed in this paper is how to support the decision to use high quality oil derivatives, because environment questions, but with a favorable economic balance. That superior cost will be translated in a higher transport chain cost. Additionally regarding coastal navigation, it is possible in the future that some new regulations could penalize elevated rates of CO2 emissions, not yet considered by MARPOL convention. This paper will analyze the availability of the use of methane as ideal fuel to get compliment of the nowa days and even future, local and international regulations of CO2 and NOX, regarding the fuel derivatives and no emissions of sulphur oxides and ashes.

  Abstract
  Within an scenario of highly sensitivity on environmental questions, followed by an international regulation body, that is restricting the emission levels from ships in ports [...]

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• Selection of short sea shipping transport chains in western europe based on external factors

  X. Osés, M. Castells

  (2007). 5th International congress on maritime technological innovations and research, pp. 17-28

  
  

  Abstract

  According to the mid term review of the EU White Paper on Transport, Short Sea Shipping is expected to grow at a rate of 59% in metric tonnes, from 2000 to 2020. If we consider that the overall expected growth in freight exchanges is of 50% (also in volume), sea transport is one of the most feasible way to reduce traf-fic congestion on European roads. Marine transport is a possible way to compete with road transport in certain traffics, mainly when assuming external costs. This paper is going to analyse five multimodal routes, considering three different lev-els of powered ships, which one is going to be the most efficient in terms of exter-nal costs.

  Abstract
  According to the mid term review of the EU White Paper on Transport, Short Sea Shipping is expected to grow at a rate of 59% in metric tonnes, from 2000 to 2020. If we consider [...]

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• The Pyrenées bottleneck. A chance for short sea shipping?

  X. Osés

  (2007). Analele Universitati Maritime Constanta, pp. 81-86

  
  

  Abstract

  On the one hand, around 45% of European Union foreign trade is still carried by road and is consequently conditioned by traffic congestion or high fuel consumption, implying disadvantages related to pollution and safety, while on the other hand, 40% is carried by short sea shipping. Short Sea Shipping in European waters has been considered by national and European governments as one of the most feasible ways to alleviate the congestion that gets worse every day on the roads and highways across Europe. This paper poses criteria providing recommendations for the best alternative means of transport for carrying cargo across the Pyrenees. 

  Abstract
  On the one hand, around 45% of European Union foreign trade is still carried by road and is consequently conditioned by traffic congestion or high fuel consumption, implying [...]

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• Studies of suitability on short sea shipping routes in SW Europe

  X. Osés, M. Castells, J. Olivella, R. González

  (2006). Maritime Transport III, pp. 597-606, ISBN: 84-689-8505-8

  
  

  Abstract

  Around 45% of European Union (EU) foreign trade is carried by road, which is conditioned by traffic congestion and high fuel consumption, and lead to implying the pollution and safety problem. Short Sea Shipping forms another 40% of the EU foreign trade. National and European governments have considered the Short Sea Shipping in European waters as one of the most feasible ways to alleviate the congestion which is getting worse each day on roads and highways in Europe. The main aim of this paper is to both study and identify the feasible routes in SW Europe which appear to be a viable solution for avoid road transport problems.

  Abstract
  Around 45% of European Union (EU) foreign trade is carried by road, which is conditioned by traffic congestion and high fuel consumption, and lead to implying the pollution [...]

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• Stern twin-propeller effects on harbor infrastructures. Experimental analysis.

  A. Mujal-Colilles, M. Castells, T. Llull, X. Gironella, X. Osés

  Water (2018). Vol. 10 (11), pp. 1-14

  
  

  Abstract

  The growth of marine traffic in harbors, and the subsequent increase in vessel and propulsion system sizes, produces three linked problems at the harbor basin area: higher erosion rates damaging docking structures, sedimentation areas reducing the total depth; resuspension of contaminated materials deposited at the seabed. The published literature demonstrates that there are no formulations for twin stern propellers to compute the maximum scouring depth. Another important limitation is the fact that the formulations proposed only use one type of maneuvering during the experimental campaign, assuming that vessels are constantly being undocked. Trying to reproduce the real arrival and departure maneuvers, 24 different tests were conducted at an experimental laboratory in a medium-scale water tank using a twin propeller model to estimate the consequences and the maximum scouring depth produced by stern propellers during the backward/docking and forward/undocking scenarios. Results confirm that the combination of backward and forward scenario differs substantially from the experiments performed so far in the literature using only an accumulative forward scenario, yielding deeper scouring holes at the harbor basin area. The results presented in this paper can be used as guidelines to estimate the effects of regular vessels at their docking location.  

  Abstract
  The growth of marine traffic in harbors, and the subsequent increase in vessel and propulsion system sizes, produces three linked problems at the harbor basin area: higher [...]

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• A ship routing system applied at short sea distances

  M. Grifoll, X. Osés

  Journal of maritime research (2017). Vol. 13 (2), pp. 3-6

  
  

  Abstract

  New generation of high-resolution meteo-oceanographic predictions provides useful tools for routing of ships in short maritime distances. In this work, the optimal ship routing analysis is investigated in maritime routes in the Western Mediterranean Sea for relative short sea distances. A* algorithm is implemented in order to obtain the optimal path under an energetic wave events. The methodological aspects are presented including the grid description and weather prediction systems. The optimized cost function is the travel time and it is obtained considering the added resistance due to waves. A practical example considers the maritime route between Barcelona and Algiers. The results show the influence of this factor in the optimum path recovered by the algorithm. The relevance of the relative direction between wave and ship route is proven comparing the ship routing results.

  Abstract
  New generation of high-resolution meteo-oceanographic predictions provides useful tools for routing of ships in short maritime distances. In this work, the optimal ship routing [...]

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• A proposal to modernize and harmonize maritime curricula in Montenegro and Albania

  M. Castells, X. Osés, K. Lapa, D. Nikolic

  Our sea: International journal of maritime science and technology (2017). Vol. 64 (1), pp. 14-19

  
  

  Abstract

  The Black Sea region, a large horizon ready to open, ready to explore, ready to show her energy, her power and opportunities. But how we are preparing for this? It is a high competition between all the “actors” implicated in this field. The industry was informed to this potential resources by a major study undertaken by Purvin and Gertz in 2011, which predicted the development of a Romanian offshore industry and now exist many recently studies that confirmed the “black resources” of the Black Sea. We all know about the emergence of shale gas in Europe, in the last years, because is increasing evidence of a more united approach on energy, so the exploration and development of gas reserves in the Black Sea is an optimal alternative to supply gas from the Caspian to south-eastern Europe. But this good alternative implicates problems generated by costs, transportation and security of the very long pipelines that will pass through several countries till reaching their final destination. I try in this paper to pay attention on the main objective in the Black Sea Region, in this offshore field, that required the cooperation and sustainability from part of European Union and all its members’ state and countries situated in the Black Sea, Mediterranean Sea or Caspian Sea.

  Abstract
  The Black Sea region, a large horizon ready to open, ready to explore, ready to show her energy, her power and opportunities. But how we are preparing for this? It is a high [...]

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• The exploration, development and perspective of oil and gas in the Black Sea region

  C. Mihailovici, X. Osés

  Journal of maritime research (2015). Vol. 12 (3), pp. 49-55

  
  

  Abstract

  The Black Sea region, a large horizon ready to open, ready to explore, ready to show her energy, her power and opportunities. But how we are preparing for this? It is a high competition between all the “actors” implicated in this field. The industry was informed to this potential resources by a major study undertaken by Purvin and Gertz in 2011, which predicted the development of a Romanian offshore industry and now exist many recently studies that confirmed the “black resources” of the Black Sea. We all know about the emergence of shale gas in Europe, in the last years, because is increasing evidence of a more united approach on energy, so the exploration and development of gas reserves in the Black Sea is an optimal alternative to supply gas from the Caspian to south-eastern Europe. But this good alternative implicates problems generated by costs, transportation and security of the very long pipelines that will pass through several countries till reaching their final destination. I try in this paper to pay attention on the main objective in the Black Sea Region, in this offshore field, that required the cooperation and sustainability from part of European Union and all its members’ state and countries situated in the Black Sea, Mediterranean Sea or Caspian Sea.

  Abstract
  The Black Sea region, a large horizon ready to open, ready to explore, ready to show her energy, her power and opportunities. But how we are preparing for this? It is a high [...]

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