Reporter：Chengjiao Ren  Research Associate in school of Engineering at the University of Western Australia

Time：14 September 2023 (Thursday) 15:00~16:00

Venue：B1-d219,Guangzhou International Campus, South China University of Technology

Tencent Meeting ID：399-242-898

Abstract：

Flow around a cylinder undergoing sinusoidal oscillations in steady currents represents an idealized simplification of real flow phenomena in many practical applications. An example of practical applications involves a riser attached to a floating vessel that undergoes periodic oscillations induced by surface waves, in the presence of a background current. The direction of the riser oscillation is not necessarily the same as the direction of the steady current. In engineering applications, prediction of hydrodynamic forces on the cylinder is often required in the design and maintenance of cylindrical marine structures. Fundamentally, understanding of the interaction between the cylinder oscillation and the flow around the cylinder is a prerequisite for predicting the hydrodynamic forces on the cylinder. Due to the complex nature of these interactions, there is a lack of reliable methods for predicting hydrodynamic forces on the cylinder undergoing oscillations in steady current. In the present talk, I will present some recent progresses on a steady flow past an oscillating circular cylinder over ranges of Reynolds number and oscillation amplitude. This topic is funded by a discovery project by Australian Research Council.

Resume:

Chengjiao Ren is a research associate (2021-present) in School of Engineering at The University of Western Australia (UWA), Australia. Dr. Ren received her Bachelor degree in Civil Engineering at Dalian University of Technology (DUT), China in 2015. Before receiving her Doctoral degree in 2021 at DUT, she became a joint PhD student at UWA from 2019-2021, supervised by Prof. Liang Cheng and Dr. Feifei Tong. Her research experience includes Computational Fluid Dynamics (CFD), hydrodynamics of cylindrical structures under wave and steady current conditions and turbulent wave boundary layers. She has published in total 7 peer-reviewed journal papers and 5 conference papers. The journal papers are all published in top journals in the field of study, such as Journal of Fluid Mechanics (5), Physics of Fluids (1) and Journal of Wind Engineering and Industrial Aerodynamics (1). Dr. Ren is serving as reviewer for Physics of Fluids and Journal of Fluids and Structures. https://www.researchgate.net/profile/Chengjiao-Ren-2.