NICOP - Wave Impact on Arctic Shipping and Offshore Technology - A Unique Modeling Facility
Abstract
Statement of Work (SOW) Models that describe wave propagation in ice covered seas have included viscous and elastic properties. A viscoelastic theory has been proposed that synthesized these different models into one model (Wang and Shen, 2010). The resulting viscoelastic dispersion relation is currently labeled as IC3 in WAVEWATCH III®. This theory assumed a linear viscoelastic floating cover and approximated the full solution with the dominant mode from the resulting dispersion relation. Using field data to validate this theory is extremely difficult due to the complicated wind, current, nonlinear wave?wave interactions present. The objectives of the proposed research are to create a laboratory data set for validating this theory. Once validated, the theory may then be calibrated using field ice measurements. These field data will be collected in the upcoming ONR Sea State program in the fall of 2015. The NTU?NEWRI is a confluence of multi?disciplinary cutting?edge science and technology innovation bed in Singapore. The Institute has faculty members with expertise in hydrodynamics, wave?structure interactions and maritime shipping. A newly built wave flume has been constructed in the NEWRI/DHI?NTU Centre laboratory to test a wide range of wave interaction with viscoelastic materials. In geophysical scales, ice covers and sediment beds have been shown to act like viscoelastic materials. Separate theories have been constructed to model the wave propagation through floating ice covers, or over submerged sediment beds. However, experimental validations are insufficient for either case. There is no theory or experimental validation for combined floating and submerged viscoelastic layers. In addition, using real ice and real sediment in laboratories face tremendous operational and scaling difficulty. The innovation at NEWRI is to use polydimethylsiloxane (PDMS) (eg. Mata et al. 2005), a material often used for bioengineering and material science purposes, in such a study. We have developed precise procedures to make targeted floating or submerged viscoelastic materials over a wide range of properties from nearly pure viscous (such as oil or loose bed materials) to rigid (such as a concrete platform or rock bed). The facility and knowledge base are unique. The current project is funded by the Singapore Ministry of Education (MOE) from 2013 to 2016. Hayley Shen, who is a PI of an ONR funded Arctic Sea State Program, is a collaborator of this MOE program. Data from this MOE program will greatly enhance the ONR output by validating the wave?in?ice models proposed by researchers. A team of researchers in NEWRI will mature its capabilities after this period and be ready to transfer the knowledge to application. A priority is to establish a wave?in?ice component to be built into the global operational model WAVEWATCH III®. In order to achieve the above mentioned objectives, the estimated cost is listed below: Personnel: S$70,000 for one Post?Doc Supplies: S$20,000 for laboratory consumables Travel (3 trips): S$18,000 Overhead to NTU (20%): S$21,600 Overall total: S$129,600 (US$98,500)
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N629091512069
Entities
People
- Adrian W.k. Law
Organizations
- Nanyang Technological University
- Office of Naval Research
- United States Navy