editorial Dear Reader, 6 Holtrop-Mennen founders reveal the secret of method’s


long-lasting success In the naval architect world Holtrop-Mennen is a household name. As Jan Holtrop and Frits Mennen retire after more than 40 years at MARIN, Report asks them to reflect on their ground-breaking achievement.


9 Big Foot spotted at MARIN! World’s deepest TLP, “Big Foot”, becomes MARIN’s 9,000th test model


10 CFD versus PIV Computational Fluid Dynamics (CFD) is playing an increasing important role in today’s


maritime industry. Report outlines efforts to improve quality levels


12 Quality checking CFD Computational Fluid Dynamics (CFD) has carved out a firm position in the MARIN portfolio.


But how reliable is CFD?


14 CFD helps optimise yacht design process Although CFD started as a complex technology with huge potential it is now at the heart


of our engineering, complementing and in some cases replacing, model testing. 16 Cooperative Research Navies continues code


improvement and validation 20 years on We catch up with the work of the Cooperative Research Navies (CRN) group as it celebrates its 20th anniversary


17 Quantifying quality Outlining MARIN’s work to provide measurement results with a specified confidence level


18 Correlation of speed-power predictions by model tests MARIN’s model-scale and full-scale services generate a wealth of high quality validation


material to provide customers with reliable power predictions


20 Risk assessment at sea – even a challenge for SAMSON MARIN’s risk assessment tool Safety Assessment Model for Shipping and Offshore on the


North Sea (SAMSON) takes on the challenge


21 Pulling together in ROPES JIP ROPES JIP investigates the effects of passing ships on the motions and the mooring loads


of berthed vessels 22 Pioneering purpose-built wind turbine installation


vessels under test MARIN tests Beluga Hochtief Offshore’s installation vessel design


Arne Hubregtse President of MARIN


report 3


First of all I would like to begin by letting you know about a true milestone in MARIN’s history. We have just made our 9,000th test model! It is amazing to think back to those early days when MARIN started in 1932 and now we have just modelled Big Foot, the world’s deepest TLP at an incredible 5,187 ft.


Report also celebrates its own milestone - our 100th issue. We started publishing MARIN’s customer magazine in May 1979, so it is gratifying to know that customers are still just as interested in reading about the latest developments in the hydrodynamics world. We highlight these develop- ments throughout this issue of Report.


In yet another special occasion, Cooperative Research Navies celebrates its 20th anniversary. We outline its continuing work on code improve- ment and validation.


Model validation is very much the theme of this issue of Report and readers can see the work MARIN does behind the scenes to make sure we give our customers the most accurate measure- ments and predictions possible.


We are also very proud to feature the pioneering Holtrop-Mennen Method - a household name in the naval architect world. We interview the two founders of the method, Jan Holtrop and Frits Mennen, as they retire after more than 40 years at MARIN.


And as well as more traditional model testing we look at the increasing role of Com- putational Fluid Dynamics (CFD) in today’s research industry.


We hope you enjoy reading Report 100 and all our other issues as much as we have enjoyed writing them for you over the years!


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