NUMERICAL SIMULATION ON PRESSURE FLUCTUATIONS OF AIR-WATER TWO-PHASE FLOW IN UNDERGROUND PIPELINE CAUSED BY TSUNAMI Article Swipe

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Kenya TAKAHASHI , Takeshi NISHIHATA , Duc Thang CHU ·

YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.2208/kaigan.74.i_181

地下管路内において気液二相流となる津波を対象とした水理模型実験の数値計算による再現をOpenFOAMにより実施し，水理模型実験結果と比較することによりOpenFOAMの適用性や気相の影響などについて検証した．その結果，管路や気相を計算対象とする場合のOpenFOAMの優位性が確認されるとともに，管内の初期状態が流れや圧力分布に影響を与えていることが分かった．また，管路出口水位や浸水深のみならず，管内空気塊が排出される様子やその気相速度もよく再現されたが，エアハンマー現象に伴う大きな圧力変動までは再現されなかった．津波来襲時の溢水現象を再現するためには地下管路内における気液二相流を考慮する必要があることが分かったが，再現精度をより向上させるためには圧縮性流体の計算をするなどの方法が考えられる．

Related Topics

Computer Simulation

Phase (Matter)

Underwater Acoustics

Environmental Science

Petroleum Engineering

Meteorology

Engineering

Physics

Mechanical Engineering

Oceanography

Quantum Mechanics

Concepts

Pipeline (software) Mechanics Flow (mathematics) Computer simulation Phase (matter) Two-phase flow Underwater Geology Environmental science Marine engineering Petroleum engineering Meteorology Engineering Physics Mechanical engineering Oceanography Quantum mechanics

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Type: article
Language: en
Landing Page: https://doi.org/10.2208/kaigan.74.i_181
OA Status: diamond
Cited By: 1
References: 7
Related Works: 10
OpenAlex ID: https://openalex.org/W2899882754

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DOI: https://doi.org/10.2208/kaigan.74.i_181

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Title: NUMERICAL SIMULATION ON PRESSURE FLUCTUATIONS OF AIR-WATER TWO-PHASE FLOW IN UNDERGROUND PIPELINE CAUSED BY TSUNAMI

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Type: article

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Language: en

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Publication year: 2018

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Publication date: 2018-01-01

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Authors: Kenya TAKAHASHI, Takeshi NISHIHATA, Duc Thang CHU

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Landing page: https://doi.org/10.2208/kaigan.74.i_181

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Concepts: Pipeline (software), Mechanics, Flow (mathematics), Computer simulation, Phase (matter), Two-phase flow, Underwater, Geology, Environmental science, Marine engineering, Petroleum engineering, Meteorology, Engineering, Physics, Mechanical engineering, Oceanography, Quantum mechanics

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Cited by: 1

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abstract_inverted_index.地下管路内において気液二相流となる津波を対象とした水理模型実験の数値計算による再現をOpenFOAMにより実施し，水理模型実験結果と比較することによりOpenFOAMの適用性や気相の影響などについて検証した．その結果，管路や気相を計算対象とする場合のOpenFOAMの優位性が確認されるとともに，管内の初期状態が流れや圧力分布に影響を与えていることが分かった．また，管路出口水位や浸水深のみならず，管内空気塊が排出される様子やその気相速度もよく再現されたが，エアハンマー現象に伴う大きな圧力変動までは再現されなかった．津波来襲時の溢水現象を再現するためには地下管路内における気液二相流を考慮する必要があることが分かったが，再現精度をより向上させるためには圧縮性流体の計算をするなどの方法が考えられる．	0
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