Author(s): Yanchong Duan; Zheng Gong; Siyu Jing; Qiang Zhong; Qigang Chen; Dejun Zhu; Xudong Fu; Danxun Li

Linked Author(s): Qigang Chen, Zheng Gong, Yanchong Duan, Dejun Zhu, Xudong Fu

Keywords: Open channel flows; Closed channel flows; Fluctuating wall shear stress

Abstract: The fluctuating wall-shear stress (FWSS) in wall-bounded flows is a topic of profound interest due to its fundamental and practical implications. Historically, the challenge of acquiring precise FWSS data has hindered the derivation of meaningful insights. However, advancements in measurement technology and computational capabilities have made more accurate FWSS data readily obtainable, thereby spurring extensive research into FWSS across a range of flow conditions. Despite the plethora of studies on FWSS in canonical wall-bounded flows, open channel flows (OCFs) have not received the same level of attention. Furthermore, it is still unclear how the FWSS in OCFs compares to that in other wall-bounded flow scenarios. This investigation is designed to address these research gaps. We will quantify both the intensity and spectral characteristics of FWSS in OCFs and then compare these findings with those from closed channel flows (CCFs) to identify both commonalities and distinctions between the two similar flow types. Given the difficulty in obtaining accurate and directly comparable experimental data, this study relies on high-fidelity and directly comparable direct numerical simulation (DNS) datasets.

DOI:

Year: 2025