Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10678
Title: Numerical modeling of a round jet discharged into random waves
Authors: Chen, YP
Li, CW 
Zhang, CK
Keywords: Large eddy simulation
Non-buoyant jet
Random waves
Issue Date: 2008
Publisher: Pergamon-Elsevier Science Ltd
Source: Ocean engineering, 2008, v. 35, no. 1, p. 77-89 How to cite?
Journal: Ocean Engineering 
Abstract: Coastal disposal of waste water can be idealized as the problem of a jet under random waves. Understanding of this phenomenon is important for engineering design and environmental impact assessment. The present study aims to simulate such phenomenon by using a 3D numerical model based on the solution of the spatially filtered and σ-transformed Navier-Stokes equations with dynamic sub-grid scale model of turbulence. The numerical solution procedures are split into three steps: advection, diffusion and pressure propagation, and a Lagrange-Euler method is used to track the free surface. Cases of vertical jet in stagnant water, pure random waves and vertical jet in random waves are simulated with the same grid system for comparative study. Different methods of generating jet inflow turbulence have been tested and the method of jet azimuthal modes is found to be the optimum. The numerical results reproduce the distinct characteristics of jet in waves, including faster decay of centerline velocity, wider lateral spreading and the occurrence of wave tractive mechanism.
URI: http://hdl.handle.net/10397/10678
DOI: 10.1016/j.oceaneng.2007.07.011
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