Scale 10 sloshing model tests
General information
Sloshing in partially filled LNG tanks is the most emerging technical issue and concern of the LNG industry associated with the application of the membrane technology. MARIN serves the industry with advice towards risk reduction associated with sloshing. This advice is twofold. On the one hand we can advice towards the allowable sloshing events, which assure integrity of containment systems. On the other hand we advice how to reduce the probability of sloshing occurrence.
The probability of sloshing depends on:
Sloshing in partially filled LNG tanks is the most emerging technical issue and concern of the LNG industry associated with the application of the membrane technology. MARIN serves the industry with advice towards risk reduction associated with sloshing. This advice is twofold. On the one hand we can advice towards the allowable sloshing events, which assure integrity of containment systems. On the other hand we advice how to reduce the probability of sloshing occurrence.
The probability of sloshing depends on:
- Environmental conditions
- Floating structure (shape and dimensions)
- Size and geometry of LNG tanks
- Filling level of the LNG tanks
- Interaction between motions of the floating structure and motions of LNG in the LNG tanks
Services & Activities
The strength assessment of containment systems under sloshing events is a very complex process, which is still a subject of extensive international research. MARIN Hydro-Structural Services (HSS) leads part of this research that involves full scale testing of membrane containment systems. Based on recently developed practical criteria we can also advice on necessity of using hydro-elastic methods, when assessing strength of structures subjected to sloshing impacts.
The Offshore business unit as well as the Hydro Structural Services group (HSS, part of the Trials & Monitoring businness unit) can serve you with the following topics:
The strength assessment of containment systems under sloshing events is a very complex process, which is still a subject of extensive international research. MARIN Hydro-Structural Services (HSS) leads part of this research that involves full scale testing of membrane containment systems. Based on recently developed practical criteria we can also advice on necessity of using hydro-elastic methods, when assessing strength of structures subjected to sloshing impacts.
The Offshore business unit as well as the Hydro Structural Services group (HSS, part of the Trials & Monitoring businness unit) can serve you with the following topics:
- Advice on dimensions and shapes of floating structures and their tanks by desk studies and numerical simulations (DIFFRAC)
- Verify dimensions and shapes of floating structures and their tanks by model tests, with proper allowance for the interaction
- Define limits for tank filling that are free of sloshing events, using numerical calculations (e.g. COMFLOW) and / or model testing
- Identify sloshing events for interim filling levels, using numerical calcuations (e.g. COMFLOW) and/or model tests
- Advice how to distribute LNG between different tanks when continuously producing (or regasifying) to minimise sloshing occurrences
Facilities & Tools
For the study of complex wave impact loads such as sloshing the following tools are available:
For the study of complex wave impact loads such as sloshing the following tools are available:
- Dedicated model tests, at various scales, in the various available model test basins
- Dedicated tests, at various scales, using a large oscillator (see picture above)
- Numerical calculations, using the COMFLOW program
Software Sales
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Experience record
The list below gives a review of projects involving sloshing carried out at MARIN:
The list below gives a review of projects involving sloshing carried out at MARIN:
- Sloshel JIP
- COMFLOW II JIP (20 participants)
- SALT JIP model tests (12 participants), 2004
- Several R&D projects
Most recent papers on sloshing presented by MARIN
(complete overview of papers can be found under Publications)
(complete overview of papers can be found under Publications)
Modelling The Effect Of Sloshing On Ship Motions
Bunnik, T.H.J. and Veldman, A. (University of Groningen), OMAE ASME 29th International Conference on Ocean, Offshore and Arctic Engineering, Shanghai, 2010
Full Scale Sloshing Impact Tests, Part 2
Kaminski M.L. and Bogaert H., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Hydro-structural behavior of LNG membrane containment systems under breaking wave impacts
Bogaert, H., Leonard, S., Marhem, M., Leclere, G. and Kaminski, M.L., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Sloshing and scaling: results from the Sloshel project
Bogaert, H., Léonard S., Brosset, L. and Kaminski, M.L., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Interaction between wave impacts and corrugations of MarkIII Containment System for LNG carriers
Bogaert, H., Brosset, L. and Kaminski, M.L., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Bunnik, T.H.J. and Veldman, A. (University of Groningen), OMAE ASME 29th International Conference on Ocean, Offshore and Arctic Engineering, Shanghai, 2010
Full Scale Sloshing Impact Tests, Part 2
Kaminski M.L. and Bogaert H., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Hydro-structural behavior of LNG membrane containment systems under breaking wave impacts
Bogaert, H., Leonard, S., Marhem, M., Leclere, G. and Kaminski, M.L., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Sloshing and scaling: results from the Sloshel project
Bogaert, H., Léonard S., Brosset, L. and Kaminski, M.L., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Interaction between wave impacts and corrugations of MarkIII Containment System for LNG carriers
Bogaert, H., Brosset, L. and Kaminski, M.L., ISOPE 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010
Most recent articles on sloshing written for MARIN report
(complete overview of articles can be found under Publications)
(complete overview of articles can be found under Publications)
Sloshing impacts captured in 110 full-scale tests
Mirek Kaminski & Edwin van de Bunt, MARIN report, 2009
Full-scale sloshing tests underway at MARIN
Mirek Kaminski, MARIN Report, 2009
MARIN tackles the problems of open moonpools on drillships
Frans Kremer, MARIN Report, 2008
JIPs focus on Offshore LNG
Bas Buchner, MARIN Report, 2006
Model Tests on a novel Side by Side Offshore LNG (off) Loading System
Arjan Voogt, MARIN Report, 2006
Mirek Kaminski & Edwin van de Bunt, MARIN report, 2009
Full-scale sloshing tests underway at MARIN
Mirek Kaminski, MARIN Report, 2009
MARIN tackles the problems of open moonpools on drillships
Frans Kremer, MARIN Report, 2008
JIPs focus on Offshore LNG
Bas Buchner, MARIN Report, 2006
Model Tests on a novel Side by Side Offshore LNG (off) Loading System
Arjan Voogt, MARIN Report, 2006
Contact
For more information on how MARIN can help you with sloshing problems, please contact:
Offshore Department or Trials & Monitoring Department
For more information on how MARIN can help you with sloshing problems, please contact:
Offshore Department or Trials & Monitoring Department