Accession Number : AD1031822


Title :   Coupling of Coastal Wave Transformation and Computational Fluid Dynamics Models for Seakeeping Analysis


Descriptive Note : Technical Report,01 Jul 2012,30 Sep 2016


Corporate Author : Univ of Hawaii at Manoa Honolulu United States


Personal Author(s) : Cheung,Kwok F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1031822.pdf


Report Date : 03 Apr 2017


Pagination or Media Count : 16


Abstract : The project focused on depth-integrated modeling of coastal wave and surf-zone processes in support of computational fluid dynamics (CFD) simulation of ship motions. There were two components of the project involving two MS and one PhD candidate under the guidance of the principal investigator. The first was the development of a numerical dispersion relation for a family of Boussinesq-type equations commonly used in modeling of coastal wave transformation. The relation depicts numerical dissipation and dispersion in wave propagation and provides guidelines for model setup in terms of temporal and spatial discretization. The second component was an extension of existing depth-integrated wave models to describe overtopping of coastal reefs and structures along with series of CFD and laboratory experiments for model validation. The basic approach utilizing the HLLS Riemann solver performs reasonably well and produces stable and efficient numerical results for practical application. Although the two components were performed separately, they both contribute to improved capabilities in modeling of the coastal wave environment that can provide input to three-dimensional seakeeping analysis.


Descriptors :   computational fluid dynamics , COMPUTATIONAL MODELING , COASTAL REGIONS , OCEAN WAVES , shallow water , wave propagation , SHIP MOTION , seakeeping


Distribution Statement : APPROVED FOR PUBLIC RELEASE