Wind turbulence effects on sand transport

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420515
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Tohoku University
• Principal Investigator: Udo Keiko 東北大学, 災害科学国際研究所, 准教授 (80371780)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 飛砂フラックス / 地形乱流 / 飛砂センサー / LES

Outline of Final Research Achievements

This study investigated wind turbulence effects on dune sand transport through field experiment of three dimensional wind velocity and aeolian sand flux. Horizontal turbulence intensity has a negative relationship with mean horizontal wind velocity and also with the aeolian sand flux in various wind conditions.
The spatial wind field during the experiment was simulated with large eddy simulation (LES) and the results show wind characteristics reasonably consistent with measured ground elevation change. However, the results also demonstrate that
accurate simulation of vertical wind velocity and both horizontal and vertical turbulence intensity in the field is a great challenge compared to simulation of horizontal velocity.

Free Research Field

海岸工学