A numerical investigation of the turbulent flow around a scale model JBC hull using the Generalized k-omega (GEKO) turbulence model

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.

Schlagworte

Computational Fluid Dynamics (CFD)

Japan Bulk Carrier

Turbulence modelling

DDC Class

600: Technik

620: Ingenieurwissenschaften

Lizenz

http://rightsstatements.org/vocab/InC/1.0/

Name

paper_0016_file_0432_A_Numerical_Investigation_of_the_Turbulent_Flow_around_a_Scale_M.pdf

Size

1.78 MB

Format

Adobe PDF

Options

A numerical investigation of the turbulent flow around a scale model JBC hull using the Generalized k-omega (GEKO) turbulence model