Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Non-hydrostatic modelling of shallow water flow around a circular array of emergent cylinders.

Wang, Jian and Zhang, Jingxin and Liang, Dongfang and Gan, Lian (2020) 'Non-hydrostatic modelling of shallow water flow around a circular array of emergent cylinders.', Journal of hydroinformatics., 22 (1). pp. 20-32.

Abstract

This paper focuses on the investigation of the wake flow around a circular patch of cylinders with different solid volume fractions (SVF). The wake flow pattern was found to be dependent on the SVF and the flow stability factor S. A non-hydrostatic model was used to simulate the open channel flow through the cylinders. The turbulence was simulated using the SST (shear strain transport) k-ω turbulence model. The model was first validated against experimental data to ensure the accuracy of the numerical simulation. Then the local turbulent flow and the wake flow field structures were investigated by changing the SVF and the water depth. The spatial evolution of the wake flow behind the patch was analysed, and the correlation between the flow pattern and the wake flow stability was discussed. The cylinder-scale turbulence was intensive, even at low SVFs and low water depths. In contrast, the patch-scale turbulence in the wake was suppressed and the unsteady bubble wake was formed when the water depth decreased, which revealed the importance of the bed friction force to the flow pattern. The parameters S and SVF were adjusted to demonstrate their contributions to the formation of the different wake flow patterns.

Item Type:Article
Full text:(AM) Accepted Manuscript
Download PDF
(1283Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.2166/hydro.2019.018
Publisher statement:© IWA Publishing 2019. The definitive peer-reviewed and edited version of this article is published in Wang, Jian, Zhang, Jingxin, Liang, Dongfang & Gan, Lian (2020). Non-hydrostatic modelling of shallow water flow around a circular array of emergent cylinders. Journal of Hydroinformatics 22(1): 20-32 doi.org/10.2166/hydro.2019.018 and is available at www.iwapublishing.com
Date accepted:18 April 2019
Date deposited:15 August 2019
Date of first online publication:22 May 2019
Date first made open access:22 May 2020

Save or Share this output

Export:
Export
Look up in GoogleScholar