Numerical study of internal waves, turbulent mixing, and behavior of particulate matter around artificial mound reef
| Project/Area Number |
17K18431
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
Aquatic bioproduction science
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| Research Institution | Fisheries Research and Education Agency |
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Principal Investigator |
FURUICHI Naoki 国立研究開発法人水産研究・教育機構, 水研機構(神栖), 主任研究員 (70588243)
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | マウンド礁 / 内部波 / 乱流 / 粒子 / LES / 人工マウンド礁 |
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| Outline of Final Research Achievements |
A large-eddy simulation (LES) study on tidally-induced internal waves and turbulent mixing processes over a marine bank (or an artificial mound reef) was conducted and the obtained results were used to examine the behavior of suspended particulate matters. After verifying the simulated results with the results from hydraulic model experiment, we carried out several numerical experiments to examine the effects of the existence of marine bank and sea water density stratification on the behavior of the suspended particulate matters. The simulated results demonstrated that the marine bank played important roles in the upward transport of particles from the near-bottom to the upper areas, especially under the stratified density conditions.
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| Academic Significance and Societal Importance of the Research Achievements |
国・都道府県の事業によって人工マウンド礁（以下、マウンド礁）の設置が進められてきた。マウンド礁の設置によって、海洋内の物質輸送機構が変化し、一次生産量ひいては水産資源の増大が期待される。本研究は、高解像度の乱流計算手法であるLESと粒子追跡実験とを組み合わせることで構造物（小規模地形）近傍の局所的な流体・物質輸送に関する信頼性を高めた考察を行った。このようにして得られたこの知見は、広域的な海の環境変化を評価・予測するためのモデルの改良や、堆周辺での漁場評価に役立つものと期待される。
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Report
(5 results)
Research Products
(18 results)
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[Journal Article] 小規模海山近傍の粒子物質輸送過程に関する数値的研究2019
Author(s)
古市尚基・大村智宏
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Journal Title
Proceedings of Annual Meeting of the Japanese Society of Fisheries Engineering
Volume: 2019
Issue: 0
Pages: 9-10
DOI
NAID
ISSN
0917-3943, 2434-6616
Related Report
Open Access
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[Journal Article] 海底混合層内の懸濁粒子動態2019
Author(s)
古市 尚基, 東 博紀, 杉松 宏一, 大村 智宏, 越川 海, 長谷川 徹, 山田 東也, 南部 亮元, 帰山 秀樹
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Journal Title
沿岸海洋研究
Volume: 57
Pages: 21-30
NAID
Related Report
Peer Reviewed
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