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http://dx.doi.org/10.3744/SNAK.2017.54.2.83

A Study on Spatial Distributions of Courant Number and Numerical Efficiency of LTS Method in Calculation of Ship Resistance Using Structured and Unstructured Meshes  

Lee, Sang Bong (Department of Naval Architecture and Offshore Engineering, Dong-A University)
Paik, Kwang-Jun (Department of Naval Architecture and Ocean Engineering, Inha University)
Park, Dong Woo (Department of Naval Architecture & Ocean Engineering, Tongmyong University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.54, no.2, 2017 , pp. 83-89 More about this Journal
Abstract
Numerical simulations of ship resistance have been performed to compare spatial characteristics of Courant number when using structured and unstructured meshes. When Euler scheme was used for time integration, the structured mesh provided a more efficient calculation because the calculation time interval was larger than that of unstructured mesh. The automatic generation of very small meshes in the unstructured mesh was mainly responsible for the limitation of calculation time interval. When local time stepping Euler scheme was applied, however, the ship resistance of unstructured mesh showed a rapid convergence while a slow convergence of ship resistance in structured mesh was caused by the small time interval in bulbous bow.
Keywords
Ship resistance; OpenFOAM; Local time stepping; Structured mesh; Unstructured mesh;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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