Study on drag and wake of fractal object as crwon-tree model.

Research Project

Project/Area Number	15K05792
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Fluid engineering
Research Institution	Nagoya Institute of Technology
Principal Investigator	USHIJIMA Tatsuo 名古屋工業大学, 工学(系)研究科(研究院), 准教授 (50314076)
Co-Investigator(Kenkyū-buntansha)	鈴木博貴山口大学, 大学院創成科学研究科, 助教 (10626873)
Project Period (FY)	2015-04-01 – 2018-03-31
Project Status	Completed (Fiscal Year 2017)
Budget Amount *help	¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000) Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords	流体工学 / 乱流 / フラクタル / 森林学 / 後流 / 抵抗 / 空気抵抗
Outline of Final Research Achievements	Trees play a role as wind break and street shade. Wind drag exerted on tree is mainly due to foliage pattern or crown-tree. In this study, Sierpinski tetrahedron, of which fractal dimensions are almost the same, is taken as a model of crown-tree. Drag on the Sierpinski tetrahedron and its wake profile are revealed. It is found that drag coefficient is constant and that properties of wake turbulence are determined by the size of smallest element (or size of leaf).

Report

(4 results)