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Ship Hull Form Optimization: A Computational Fluid Dynamics (CFD) Approach
Donatus Eberechukwu Onwuegbuchunam,
Favour Chimobi Ogbenna,
Nnaemeka Charles Ezeanya,
Kenneth Okechukwu Okeke
Issue:
Volume 5, Issue 3, September 2019
Pages:
43-49
Received:
17 June 2019
Accepted:
14 August 2019
Published:
15 October 2019
Abstract: Performance of ship resistance and other propulsion characteristics greatly depend on ships’ hull form. However, design considerations based on range of hull modifications can be practically limited by material and time resources, hence the need for computational optimization techniques based on Computational Fluid Dynamics (CFD). In this paper, hull form of a parent vessel: single screw supply vessel was screen designed and then sequentially optimized for total resistance and wave height through the application of CFD technique. The modelling was done using ANSYS®, CAESES® and NAVCAD® workbench. Input parameters included moulded beam, steepness of stem and length overall. These were the basis for parametric variations of hull forms during optimization. The optimization processes (based on turbulent flows) lasted for about two hours. A model of the optimized hull was built and tested in marine towing tank with appendages including propeller and rudder at respective model speeds in standard conditions. Towing tests showed that the optimized ship hull exhibited low resistance and decreased wave height in comparison with parent hull. The robustness of CFD technique particularly for stern to stem hull modification was further established.
Abstract: Performance of ship resistance and other propulsion characteristics greatly depend on ships’ hull form. However, design considerations based on range of hull modifications can be practically limited by material and time resources, hence the need for computational optimization techniques based on Computational Fluid Dynamics (CFD). In this paper, hu...
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Blockchain Technology as a Risk Mitigation Tool in Supply Chain
Mian Wasim Layaq,
Alexander Goudz,
Bernd Noche,
Muhammad Atif
Issue:
Volume 5, Issue 3, September 2019
Pages:
50-59
Received:
24 September 2019
Accepted:
4 October 2019
Published:
15 October 2019
Abstract: The main purpose of this paper is to investigate the research development in supply chain risk management (SCRM) and to connect the new emerging digital technology Blockchain that could help to mitigate risks in any supply chain. Emerging literature, case studies, citations are used to fulfil this the task. The study will explore Blockchain and supply chain risks in details and will compare, how Blockchain based supply chain can mitigate these risks. There are many risks associated to supply chains but we will limit our study to only supply risk and study different areas of Blockchain application in supply chain with supply risk. Blockchain technologies have a potential to upgrade current supply chains. This will not only increase its performance in terms of speedy flow of raw material, finished goods, information and money flow but also help to mitigate current risk in supply chain by increasing visibility and transparency of supply chain. Smart contracts, IoT and Blockchain can serve together to achieve maximum efficiency and effectiveness in SCM. This research contributes to explore further research fields of Blockchain technology in different areas of supply chain risk management.
Abstract: The main purpose of this paper is to investigate the research development in supply chain risk management (SCRM) and to connect the new emerging digital technology Blockchain that could help to mitigate risks in any supply chain. Emerging literature, case studies, citations are used to fulfil this the task. The study will explore Blockchain and sup...
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Priority Areas in Nigeria’s Maritime Sector: Developing Agenda for Research
Donatus Eberechukwu Onwuegbuchunam
Issue:
Volume 5, Issue 3, September 2019
Pages:
60-67
Received:
23 May 2019
Accepted:
7 October 2019
Published:
23 October 2019
Abstract: This paper proposes research agenda to identify research priority areas in Nigeria’s maritime sector.. The aim is twofold: to systematically identify and evaluate critical areas in the maritime sector as basis for optimized investments in human and material resources and secondly based on our findings, propose policy response models that could be applied to resolve impacts of random developments in international shipping environment on Nigeria’s maritime sector. The main research agenda items addressed in this paper included: port infrastructural facilities, shipping outputs, ship repair service capacity, maritime clusters, offshore shipping service demands, pollution management and manpower needs in the industry. Risk management strategies for commercial shipping operation and critical transport infrastructure/logistics supply chains were also discussed. Specifically, modelling techniques and models that could be employed for empirical studies on the identified areas were proposed.
Abstract: This paper proposes research agenda to identify research priority areas in Nigeria’s maritime sector.. The aim is twofold: to systematically identify and evaluate critical areas in the maritime sector as basis for optimized investments in human and material resources and secondly based on our findings, propose policy response models that could be...
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