On the Turbulent Structures of Flows over a Traveling Wave Train

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概要

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• Characteristics of the airflow over a train of waves moving at a constant speed are investigated using a direct numerical simulation. We simulate the flow for various wave ages (c/u_*=0, 4, 8, 10, 12, 16 and 20), where c is thephase speed of the wind wave and u_* is the friction velocity on the wave surface. The results show that both the mean flow profiles and the turbulent statistics depend strongly on the wave age. For example, the mean-flow speed in the log layer generally decreases at small wave ages, i.e., when the wave growth rate is positive. Vertical profiles of the flow change significantly at the critical height z_c, where the mean flow speed and the wave speed c agree. Then, the wave-induced vertical flux of the horizontal momentum is positive below z_c, decreases rapidly near z_c, and becomes negative above z_c.

• 一般社団法人日本機械学会の論文
• 2006-11-15

著者

• Ueda Hiromasa

  Acid Deposition And Oxidant Res. Center Niigata Jpn

• KIHARA Naoto

  Division of Earth and Planetary Sciences, Kyoto University

• HANAZAKI Hideshi

  Department of Mechanical Engineering and Science, Kyoto University

• MIZUYA Toru

  Kanagawa Industrial Technology Research Institute

• Kihara Naoto

  Division Of Earth And Planetary Sciences Kyoto University:(present Address)civil Engineering Researc

• Hanazaki Hideshi

  Department Of Mechanical Engineering And Science Kyoto University

関連論文

• On the Turbulent Structures of Flows over a Traveling Wave Train
• Experimental and Numerical Study on a Free Convection Layer Developing under a Water Surface
• Evolution and Structure of the Free Convective Layer Developing under a Water Surface(Environmental Flows)
• Numerical Analysis of Instantaneous Forces Acting on Solid Particles

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