Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16531
Title: Numerical study of a round buoyant jet under the effect of JONSWAP random waves
Authors: Chen, YP
Li, CW 
Zhang, CK
Xu, ZS
Keywords: Buoyant jet
JONSWAP random waves
Large eddy simulation
Numerical study
Issue Date: 2012
Publisher: Chinese Ocean Engineering Society, co-published with Springer
Source: China ocean engineering, 2012, v. 26, no. 2, p. 235-250 How to cite?
Journal: China ocean engineering 
Abstract: This paper presents a numerical study on the hydrodynamic behaviours of a round buoyant jet under the effect of JONSWAP random waves. A three-dimensional large eddy simulation (LES) model is developed to simulate the buoyant jet in a stagnant ambient and JONSWAP random waves. By comparison of velocity and concentration fields, it is found that the buoyant jet exhibits faster decay of centerline velocity, wider lateral spreading and larger initial dilution under the wave effect, indicating that wave dynamics improves the jet entrainment and mixing in the near field, and subsequently mitigate the jet impacts in the far field. The effect of buoyancy force on the jet behaviours in the random waves is also numerically investigated. The results show that the wave effect on the jet entrainment and mixing is considerably weakened under the existence of buoyancy force, resulting in a slower decay rate of centerline velocity and a narrower jet width for the jet with initial buoyancy.
URI: http://hdl.handle.net/10397/16531
ISSN: 0890-5487
EISSN: 2191-8945
DOI: 10.1007/s13344-012-0018-0
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