On the flow conditions requiring detailed geometric modeling for multiscale evaluation of coastal forests

Advanced Modeling and Simulation in Engineering Sciences

Research Article

Shinsuke Takase¹  Shuji Moriguchi²  Kenjiro Terada²  Reika Nomura² 

[1] Department of Civil Engineering and Architecture, Hachinohe Institute of Technology, Hachinohe, Japan;International Research Institute of Disaster Science (IRIDeS), Tohoku University, Sendai, Japan;

关键词: Multiscale evaluation;    Numerical flow test;    Coastal forests;    Attenuation effects;    Geometric modeling of trees;    Tsunami mitigation;   

DOI  :  10.1186/s40323-023-00250-2

 received in 2022-09-12, accepted in 2023-07-31,  发布年份 2023

来源: Springer

【 摘 要 】

The multiscale evaluation method is applied to assess the influence of detailed geometric modeling of trees on their macroscopic attenuation effect against tsunami-like flow. Specifically, we conduct a series of numerical flow tests (NFTs), i.e., 3D flow simulations in a local test domain (LTD), under various inflow conditions to evaluate the macroscopic flow characteristics in the LTD accommodating an array of either simple cylinder or detailed tree models that mimic a coastal forest. After the procedure of NFTs in the multiscale evaluation method is briefly summarized and the corresponding governing equations and analysis conditions are presented, we introduce two indices for evaluating the macroscopic flow characteristics within the framework of multiscale modeling. Based on the NFT results, we discuss how the modeling scheme for trees influences the macroscopic flow characteristics in terms of these indices and clarify the microscopic mechanisms that influence the macroscopic attenuation property. Additionally, the NFT results are compared with the experimental results to justify these discussions, and key factors are explored in terms of reproducing real phenomena. In addition, to apply the multiscale evaluation method to assess the disaster mitigation performance of various types of ecosystems in a realistic situation, we discuss under what circumstances and with what level of detail vegetation should be modeled.

【 授权许可】

CC BY   
© Computational Structural Mechanics Association 2023

【 图 表 】

Fig. 3

Fig. 6

Fig. 2

Fig. 3

Fig. 2

Fig. 1

Fig. 1

Fig. 6

Fig. 4

12888_2023_5124_Article_IEq2.gif

12888_2023_5124_Article_IEq1.gif

Fig. 2

Fig. 3

Fig. 3

Fig. 7

Fig. 2

Fig. 4

Fig. 5

Fig. 3

Fig. 4

Fig. 3

Fig. 2

Fig. 2

Fig. 6

Fig. 4

Fig. 7

Fig. 6

Fig. 5

Fig. 2

Fig. 3

Fig. 5

Fig. 2

Fig. 8

Fig. 3

Fig. 1

Fig. 2

Fig. 1

Fig. 4

Fig. 5

Fig. 1

12862_2023_2133_Article_IEq130.gif

Fig. 3

Fig. 4

Fig. 6

Fig. 2

Fig. 2

Fig. 1

Fig. 4

13690_2023_1147_Article_IEq20.gif

13690_2023_1147_Article_IEq19.gif

13690_2023_1147_Article_IEq18.gif

13690_2023_1147_Article_IEq16.gif

Fig. 3

13690_2023_1147_Article_IEq14.gif

Fig. 2

Fig. 1

13690_2023_1147_Article_IEq11.gif

13690_2023_1147_Article_IEq10.gif

13690_2023_1147_Article_IEq9.gif

13690_2023_1147_Article_IEq8.gif

13690_2023_1147_Article_IEq7.gif

Fig. 2

13690_2023_1147_Article_IEq4.gif

13690_2023_1147_Article_IEq3.gif

13690_2023_1147_Article_IEq1.gif

Fig. 3

Fig. 1.

Fig. 1

Fig. 6

Fig. 3

Fig. 7

Fig. 5

Fig. 2

Fig. 4

Fig. 5

Fig. 1

12862_2023_2133_Article_IEq80.gif

Fig. 6

Fig. 2

Fig. 1

Fig. 2

Fig. 2

Fig. 1

Fig. 1

Fig. 1

Fig. 3

Fig. 1

12862_2023_2148_Article_IEq5.gif

Fig. 11

Fig. 4

Fig. 1

Fig. 1

Fig. 1

Fig. 1

12862_2023_2133_Article_IEq61.gif

Fig. 2

Fig. 5

Fig. 3

Fig. 1

Fig. 2

Fig. 2

12862_2023_2133_Article_IEq56.gif

41522_2023_426_Article_IEq8.gif

Fig. 5

Fig. 6

Fig. 4

Fig. 5

Fig. 3

Fig. 2

Fig. 3

Fig. 2

Fig. 2

Fig. 1

Fig. 6

Fig. 2

Fig. 6

Fig. 4

Fig. 7

Fig. 4

Fig. 2

Fig. 2

Fig. 1

Fig. 1

Fig. 3

Fig. 1

Fig. 6

Fig. 4

Fig. 1

Fig. 4

Fig. 1

Fig. 2

13690_2023_1163_Article_IEq1.gif

Fig. 5

Fig. 3

Fig. 2

Fig. 4

Fig. 6