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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Numerical simulation of a neutrally buoyant round jet in a wave environment
Numerical simulation of a neutrally buoyant round jet in a wave environment
Author : YEN-LUNG CHEN(1), SHIH-CHUN HSIAO(2), YU-CHENG HOU(3), HAN-LUN WU(4) & YUAN-CHIEH WU(5)
ABSTRACT
This paper aims to simulate a neutrally buoyant round jet discharged at the mid-depth in the opposite direction to the wave
propagation using a three-dimensional numerical model named FLOW-3D. The present numerical model solves the
Reynolds-averaged Navier-Stokes (RANS) equations combined with standard k  turbulence model, and the free
surface deformation is tracked using volume of fluid method (VOF). The round jet is modelled by a horizontal pipe and
mass source. The capability of numerical model simulating the round jet in a stagnant environment is firstly validated by an
empirical formula. Comparisons between the empirical formula and present numerical results show good agreements.
Then, a neutrally buoyant round jet in a wave environment is investigated. The decay of jet centerline velocity is compared
with available experimental data. Finally, the variation of the jet cross-sectional profile under different wave height is
discussed. The results show that the ratio of the jet vertical width (z-direction) to its horizontal width (y-direction) is
insensitive to wave periods, but it increases in the potential core and decreases in the near field with the increase of the
wave height.
File Size : 351,690 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 26/08/2015
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