SPH-DEM連成解析による洗堀現象シミュレーションにおける乱流の影響

Translated title of the contribution: The effects of turbulent flow in soil scouring simulation based on a SPH-DEM coupling method

藤井 孟大, 浅井 光輝

Research output: Contribution to journalArticle

Abstract

<p>The mechanisms of the seawall destruction have been studied and the following three causes have been investigated in general; 1) horizontal force due to the water level difference, 2) soil scour and erosion behind the seawall during overflow, 3) seepage failure associated with the reduction of the bearing capacity. Whereas, the collapse predictions by complex destruction factors have not ever been realized. Hence, to predict various destruction due to interaction between water and soil, a multiphase flow simulator utilizing the Incompressible Smoothed Particle Hydrodynamics method (ISPH method) for water and Discrete Element method (DEM) for soil is developed in our research group. In this research, scouring phenomena in particularly gravel compared between vertical jet flow experiment and simulation. The authors proposed modifying drag force model in the vicinity of ground focused on gravel movement affected by turbulent eddy. We confirmed necessity of modified drag force in turbulent through comparison between experiment and calculation.</p>
Translated title of the contributionThe effects of turbulent flow in soil scouring simulation based on a SPH-DEM coupling method
Original languageJapanese
Pages (from-to)135
Journal計算力学講演会講演論文集
Volume2019
Issue number0
DOIs
Publication statusPublished - 2019

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