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Secondary-current-mediated reorganisation of near-wall VLSMs over spanwise heterogeneous roughness
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OA
AI
H
K
陈
李
高
DOI：10.1017/jfm.2026.11775.png)
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Abstract
En 中文
This study investigates turbulent open-channel flow over spanwise-heterogeneous roughness strips composed of fixed spherical elements; with emphasis on the interaction between roughness-induced secondary currents (SCs) and very-large-scale motions (VLSMs). Direct numerical simulations are performed at friction Reynolds numbers . These results show that roughness-induced SCs govern both the kinematic organisation and the energy-redistribution pathways of VLSMs in spanwise-heterogeneous open-channel flow.
Keywords:
turbulent boundary layers
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3.9
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2.0W
Citations:
9.4W
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