Wind turbulence effects on sand transport

• 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
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 飛砂フラックス / 地形乱流 / 飛砂センサー / LES / UD-101 / 高頻度センサー / RIAM-COMPACT

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.

Research Products

• [Journal Article] Wind turbulence effects on dune sand transport (2016)
  • Author(s): Keiko Udo
  • Journal Title: Journal of Coastal Research Volume: Special Issue 75 Issue: sp1 Pages: 333-337
  • DOI: 10.2112/si75-067.1
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] CHARACTERISTICS OF WIND AND AEOLIAN SAND FLUX OVER A COASTAL DUNE (2015)
  • Author(s): 有働恵子
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Volume: 71 Issue: 2 Pages: I_529-I_534
  • DOI: 10.2208/kaigan.71.I_529
  • NAID: 130005109288
  • ISSN: 1883-8944, 1884-2399
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Wind turbulence effects on dune sand transport (2016)
  • Author(s): Keiko Udo
  • Organizer: International Coastal Symposium
  • Place of Presentation: Sydney, Australia
  • Year and Date: 2016-03-07
  • Int'l Joint Research
• [Presentation] 砂丘周辺の飛砂フラックスと風向風速特性との関係 (2015)
  • Author(s): 有働恵子
  • Organizer: 海岸工学講演会
  • Place of Presentation: 東京
  • Year and Date: 2015-11-11
• [Presentation] Relationship Between Wind Characteristics and Sand Flux Over Coastal Dunes (2013)
  • Author(s): Keishi OKAMURA, Keiko UDO, Shota MITSUSHIO, and Akira MANO
  • Organizer: AOGS 10th Annual Meeting
  • Place of Presentation: Brisbane, Australia