Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/65463
Title: Modelling of a non-buoyant vertical jet in waves and currents
Authors: XU, ZS
CHEN, YP
TAO, JF
PAN, Y
ZHANG, CK
LI, CW 
Keywords: Cross-flow
Large eddy simulation (LES)
Turbulent jet
Wave
Wave and cross-flow coexisting
Issue Date: 2016
Publisher: Elsevier
Source: Journal of hydrodynamics, Ser.B, 2016, v. 28, no. 5, p. 778-793 How to cite?
Journal: Journal of hydrodynamics, Ser.B 
Abstract: A generic numerical model using the large eddy simulation (LES) technique is developed to simulate a non-buoyant vertical jet in wave and/or current environments. The experimental data obtained in five different cases, i.e., one case of the jet in a wave only environment, two cases of the jet in a cross-flow only environment and two cases of the jet in a wave and cross-flow coexisting environment, are used to validate the model. The grid sensitivity tests are conducted based on four different grid systems and the results illustrate that the non-uniform grid system C (205×99×126 nodes with the minimum size of 1/10 jet diameter) is sufficiently fine for the modelling. The comparative study shows that the wave-current non-linear interaction should be taken into account at the inflow boundary while modelling the jet in wave and cross-flow coexisting environments. All numerical results agree well with the experimental data, showing that: (1) the jet under the influence of the wave action has a faster centerline velocity decay and a higher turbulence level than that in the stagnant ambience, meanwhile the “twin peaks” phenomenon exists on the cross-sectional velocity profiles, (2) the jet under a cross-flow scenario is deflected along the cross-flow with the node in the downstream, (3) the jet in wave and cross-flow coexisting environments has a flow structure of “effluent clouds”, which enhances the mixing of the jet with surrounding waters.
URI: http://hdl.handle.net/10397/65463
ISSN: 1001-6058
DOI: 10.1016/S1001-6058(16)60680-7
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page view(s)

11
Last Week
4
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.