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A numerical investigation of the turbulent flow around a scale model JBC hull using the Generalized k-omega (GEKO) turbulence model
Citation Link: https://doi.org/10.15480/882.3325
Publikationstyp
Conference Paper
Date Issued
2019-09
Sprache
English
Author(s)
Herausgeber*innen
TORE-DOI
TORE-URI
Article Number
16
Citation
11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Paper 16
Contribution to Conference
In this investigation, qualitative comparisons with experimentally obtained PIV data from a scale-model wind tunnel facility are made with numerical solutions obtained using CFD for the Japan Bulk Carrier (JBC) geometry. Distributions of relevant quantities such as local velocity, local vorticity and local turbulence quantities at specific locations in the near-stern region are compared in both straight-ahead and pure-drift configurations. For the numerical investigation, a new turbulence model, Generalized k-omega (GEKO), is employed. This model combines the approach of various other two-equation RANS based models and extends the range of application by providing the user with free parameters (based on near-wall influence, flow separation, mixing, and jet spreading) that can be adjusted for specific types of flow. The effect of varying the separation coefficient, C_SEP on the hull wake characteristics of the JBC is examined. Grid dependence studies for various types of unstructured mesh are also conducted to assess the sensitivity of the results to grid type and grid resolution.
Subjects
Computational Fluid Dynamics (CFD)
Japan Bulk Carrier
Turbulence modelling
DDC Class
600: Technik
620: Ingenieurwissenschaften
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