Journal article
On the maximum velocity profile of wave boundary layer flows in the very rough turbulent regime
Applied ocean research, Vol.145, 103937
04/2024
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Source: InCites
Abstract
The maximum velocity profile in turbulent wave boundary layer flows has been experimentally investigated under both regular and irregular wave conditions. Four types of seabed models are adopted, i.e., smooth, sand-covered, uniform-sphere-covered and nonuniform-stone covered. The results show that the maximum overshoot increases with the decreasing A/ks (A is the semi-excursion of fluid particles in the free stream and ks is the bottom roughness), but it is not notably influenced by the irregularity of the waves nor the nonuniformity of bottom roughness elements. Two-dimensional numerical simulations are carried out to reveal the physics behind the large overshoot behavior. It is found that the gap flow accelerates around roughness elements and subsequently contributes to the overshoot. A three-parameter defect function is proposed that well describes the maximum velocity profile, and all three model parameters are correlated with the governing flow parameter A/ks.
Details
- Title
- On the maximum velocity profile of wave boundary layer flows in the very rough turbulent regime
- Creators
- Yunfei Teng - Dalian University of TechnologyFeifei Tong - Southern Cross UniversityYi Liu - China National Offshore Oil CorporationLusheng Jia - China National Offshore Oil CorporationZhanjie Chen - Dalian University of TechnologyZhe Gao - South China University of TechnologyLiang Cheng - South China University of TechnologyGuoqiang Tang - Dalian University of TechnologyLin Lu - Dalian University of TechnologyChen Li - Dalian University of Technology
- Publication Details
- Applied ocean research, Vol.145, 103937
- Publisher
- Elsevier Ltd
- Identifiers
- 991013169400002368
- Copyright
- © 2024 Elsevier Ltd. All rights reserved.
- Academic Unit
- Engineering; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article