ROLE OF VERTICAL PRESSURE GRADIENT IN WAVE BOUNDARY LAYERS

Proceedings of the International Conference on Coastal Engineering

Karsten LindegÃ¥rd Jensen²  Giovanna Vittori¹  Paolo Blondeaux¹  B. Mutlu Sumer² 

[1] University of Genoa, Department of Civil, Chemical and Environmental Engineering, Via Montallegro 1, 16146 Genoa;Technical University of Denmark, Department of Mechanical Engineering, Section for Fluid Mechanics, Coastal and Maritime Engineering, 2800 Kgs. Lyngby

关键词: wave boundary layers;    turbulence;    vertical pressure gradient;    DNS;    transition to turbulence;   

DOI  :  10.9753/icce.v34.waves.47

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

The pressure field in an oscillatory boundary layer is obtained by means of direct numerical simulations (DNS). The vertical pressure gradient is treated as any other turbulence quantity and its statistical properties are calculated from the DNS data. Moreover, a criterion involving the vertical pressure gradient is used to detect spots. The large fluctuations of the vertical pressure gradient, which take place in the turbulent flow, have significant implications for sediment transport.

【 授权许可】

Unknown