An Offline based On-demand Visualization System of Large-scale Particle Simulation for Tsunami Disaster Prevention

On the vessels moored at the wharf, the situation such as drifting and wash up on the wharf due to the breaking of the mooring lines is occurred by the tsunami. The authors are clarified for applicability of the proposed floating tsunami protection wharf (FTPW). FTPW is the floating pier for tsunami disaster. The effect of FTPW is most promising as disaster prevention and mitigation measures for the moored vessels. The authors examined large scale FTPW until now. However, when floating body length was longer than a ship breadth, the possibility that disaster prevention performance of FTPW decreased was confirmed. In this study, the examination about the influence that floating body length gives in disaster prevention performance of FTPW is performed using numerical simulation. Therefore, in the range of length of FTPW/breadth of vessel = 1.0 to 8.0, it was confirmed that tsunami protection performance of FTPW was shown enough.

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NEW EDUCATION TOOL FOR TSUNAMI DISASTER PREVENTION BASED ON TUSNAMI NUMERICAL SIMULATION AND IMAGE ANALYSIS

Journal of Japan Society of Civil Engineers Ser B2 (Coastal Engineering) ◽

10.2208/kaigan.76.2_i_1237 ◽

2020 ◽

Vol 76 (2) ◽

pp. I_1237-I_1242

Author(s):

Yuta MITOBE ◽

Kazuya SASE ◽

Tatsuya KIMURA ◽

Masaya ABE

Keyword(s):

Numerical Simulation ◽

Image Analysis ◽

Disaster Prevention ◽

Tsunami Disaster ◽

Education Tool ◽

New Education

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An on-demand scheme driven by the knowledge of geospatial distribution for large-scale high-resolution impervious surface mapping

GIScience & Remote Sensing ◽

10.1080/15481603.2021.1909304 ◽

2021 ◽

pp. 1-25

Author(s):

Min Huang ◽

Nengcheng Chen ◽

Wenying Du ◽

Mengtian Wen ◽

Daoye Zhu ◽

...

Keyword(s):

High Resolution ◽

Large Scale ◽

Impervious Surface ◽

Surface Mapping ◽

On Demand

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Development and Testing of an Unmanned Aerial Vehicle for Large Scale Particle Image Velocimetry

Volume 3: Industrial Applications; Modeling for Oil and Gas, Control and Validation, Estimation, and Control of Automotive Systems; Multi-Agent and Networked Systems; Control System Design; Physical Human-Robot Interaction; Rehabilitation Robotics; Sensing and Actuation for Control; Biomedical Systems; Time Delay Systems and Stability; Unmanned Ground and Surface Robotics; Vehicle Motion Controls; Vibration Analysis and Isolation; Vibration and Control for Energy Harvesting; Wind Energy ◽

10.1115/dscc2014-5838 ◽

2014 ◽

Cited By ~ 4

Author(s):

Christopher Pagano ◽

Flavia Tauro ◽

Salvatore Grimaldi ◽

Maurizio Porfiri

Keyword(s):

Particle Image Velocimetry ◽

Large Scale ◽

Field Experiments ◽

Particle Image ◽

Low Cost ◽

Surface Flow ◽

Natural Environments ◽

Natural Stream ◽

Image Velocimetry ◽

Scale Particle

Large scale particle image velocimetry (LSPIV) is a nonintrusive environmental monitoring methodology that allows for continuous characterization of surface flows in natural catchments. Despite its promise, the implementation of LSPIV in natural environments is limited to areas accessible to human operators. In this work, we propose a novel experimental configuration that allows for unsupervised LSPIV over large water bodies. Specifically, we design, develop, and characterize a lightweight, low cost, and stable quadricopter hosting a digital acquisition system. An active gimbal maintains the camera lens orthogonal to the water surface, thus preventing severe image distortions. Field experiments are performed to characterize the vehicle and assess the feasibility of the approach. We demonstrate that the quadricopter can hover above an area of 1×1m2 for 4–5 minutes with a payload of 500g. Further, LSPIV measurements on a natural stream confirm that the methodology can be reliably used for surface flow studies.

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Thermo-mechanical coupling particle simulation of three-dimensional large-scale non-isothermal problems

Engineering Computations ◽

10.1108/ec-04-2016-0135 ◽

2017 ◽

Vol 34 (5) ◽

pp. 1551-1571 ◽

Cited By ~ 2

Author(s):

Ming Xia

Keyword(s):

Large Scale ◽

Three Dimensional ◽

Simulation Method ◽

Particle Simulation ◽

Similarity Criteria ◽

Particle Model ◽

Length Scale ◽

Content Type ◽

Mechanical Coupling ◽

Particle Simulation Method

Purpose The main purpose of this paper is to present a comprehensive upscale theory of the thermo-mechanical coupling particle simulation for three-dimensional (3D) large-scale non-isothermal problems, so that a small 3D length-scale particle model can exactly reproduce the same mechanical and thermal results with that of a large 3D length-scale one. Design/methodology/approach The objective is achieved by following the scaling methodology proposed by Feng and Owen (2014). Findings After four basic physical quantities and their similarity-ratios are chosen, the derived quantities and its similarity-ratios can be derived from its dimensions. As the proposed comprehensive 3D upscale theory contains five similarity criteria, it reveals the intrinsic relationship between the particle-simulation solution obtained from a small 3D length-scale (e.g. a laboratory length-scale) model and that obtained from a large 3D length-scale (e.g. a geological length-scale) one. The scale invariance of the 3D interaction law in the thermo-mechanical coupled particle model is examined. The proposed 3D upscale theory is tested through two typical examples. Finally, a practical application example of 3D transient heat flow in a solid with constant heat flux is given to illustrate the performance of the proposed 3D upscale theory in the thermo-mechanical coupling particle simulation of 3D large-scale non-isothermal problems. Both the benchmark tests and application example are provided to demonstrate the correctness and usefulness of the proposed 3D upscale theory for simulating 3D non-isothermal problems using the particle simulation method. Originality/value The paper provides some important theoretical guidance to modeling 3D large-scale non-isothermal problems at both the engineering length-scale (i.e. the meter-scale) and the geological length-scale (i.e. the kilometer-scale) using the particle simulation method directly.

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