NUMERICAL SIMULATION OF FLOW PAST A SQUARE CYLINDER SUBMERGED UNDER THE FREE SURFACE

- Journal title : Journal of computational fluids engineering
- Volume 20, Issue 4, 2015, pp.51-57
- Publisher : Korea Society of Computational Fluids Engineering
- DOI : 10.6112/kscfe.2015.20.4.051

Title & Authors

NUMERICAL SIMULATION OF FLOW PAST A SQUARE CYLINDER SUBMERGED UNDER THE FREE SURFACE

Ahn, Hyungsu; Yang, Kyung-Soo; Park, Doohyun;

Ahn, Hyungsu; Yang, Kyung-Soo; Park, Doohyun;

Abstract

In the present study, two-dimensional numerical investigation of flow past a square cylinder beneath the free surface has been performed to identify the effects of presence of the free surface. An immersed boundary method was adopted for implementation of the cylinder cross-section in a Cartesian grid system. Also, a level-set method was used to capture the interface of two fluids. To prevent transition to three-dimensional flow, Reynolds number chosen for this simulation was 150. The cases for Froude number 0.2 and gap ratio(h/D) between 0.25 and 5.00 were examined. At the specific Reynolds number, we study the effects of gap ratio on flow characteristics around a square cylinder by computing flow fields, force coefficients and Strouhal number.

Keywords

Immersed Boundary Method;Square Cylinder;Free-surface;

Language

Korean

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