Explanipedia

A weakly-compressible DEM–CFD framework for dense gas–solid multiphase flows: Foundations consistent with reactive coupling Open

Yuki Yakata, Kimiaki Washino, Masaya Muto, Ryoichi Kurose, Takuya Tsuji · 2025

Validation of coarse grained DEM for simulating loose packing of cohesive powders Open

Kimiaki Washino, Dorian Faroux, Ei L. Chan, Tomoya Wakamatsu, Takuya Tsuji , et al. · 2025

On DEM simulation of loose packing behaviour of fine and cohesive particles Open

Kimiaki Washino, Ei L. Chan, Dorian Faroux, Takuya Tsuji, Tatsuya Takahashi , et al. · 2025

LATERAL RESISTANT SYSTEM OF SINGLE-STORY ROCKING SHEAR WALL STRUCTURE OBTAINED FROM LARGE-DEFORMATION STATIC LOADING TEST Open

So Momose, Takuya Tsuji, Takafumi Nakagawa, Shoichi Nakashima, Yasuhiro Araki , et al. · 2024

DEM analysis of cohesive granular shear flow using dynamic adhesion force model – Model validation for contact-dominated regime Open

Toshitsugu Tanaka, Seiya Tanaka, Kimiaki Washino, Takuya Tsuji · 2024

SEISMIC DESIGN AND EXPERIMENTAL VERIFICATION OF THREE-STOREY CLT BUILDING WITH CONTINUOUS SHEAR WALLS Open

Takuya Tsuji, Hiroshi Isoda, Yuichi HORIE, Takafumi Nakagawa, Ryudai TAKAHASHI , et al. · 2024

The shaking table tests of a three-storey CLT building with two types of continuous shear walls were conducted to verify the seismic design. One was the post-tensioned shear wall system and the other was the shear wall fixed at the base wi…

Three-Dimensional Wireless Measurement of Float–Sink Object Motions in a Gas–Solid Fluidized Bed Open

Tomoki Katayama, Yoko Otsuka, Shiori Saito, Shusaku Harada, Takuya Tsuji , et al. · 2024

ANALYTICAL STUDY ON SEISMIC BEHAVIOR OF VERTICAL MIXED STRUCTURE FOR MID-RISE BUILDINGS AND RATIONALIZATION OF SEISMIC DESIGN Open

Takuya Tsuji, Hiroshi Isoda, Yasuhiro Araki · 2023

Analytical parametric studies were performed on the vertical mixed structure intended for mid-rise buildings, to investigate the seismic behavior. Based on the results of the analysis, a method for rationalization of seismic design is prop…

LATERAL RESISTANCE OF COMPOSITE STRUCTURE OF STEEL BEAM AND CLT WALL CONNECTED WITH DOWELS Open

Hiroko IMAMURA, Takuya Tsuji, Yasuhiro Araki, T. Furusawa, Hiroshi Isoda , et al. · 2023

In this research, the structural performance of CLT panel structure was confirmed through full scaled experiments, in which steel beams and CLT were jointed together using steel dowels. The number of drift pins in the connections at the fo…

RESEARCH ON STRUCTURAL PERFORMANCE OF SHEAR WALL OF CLT CONSTRUCTION METHOD WITH STEEL BEAMS AND TENSION MEMBERS Open

Yasuhiro Araki, Takuya Tsuji, T. Furusawa, Hiroko IMAMURA, Hiroshi Isoda , et al. · 2023

This research proposes a structural system for CLT shear wall that demonstrates high CLT shear performance, high deformation capability, and a method for determining its target performance. CLT shear wall with steel beams, using tensile me…

Local Structure Analysis of Dyn-Zrn Solid Solutions Open

Yasuhiro Yoneda, Takuya Tsuji, Daiju Matsumura, Yoshihiro Okamoto, Seiya Takaki , et al. · 2023

Segregation of Large Spheres in a Pseudo Two-Dimensional Gas-Fluidized Bed Open

Yudai Tanaka, Takuya Tsuji, Toshitsugu Tanaka, Kimiaki WASHINO · 2022

Gas-fluidized beds are used for the combustion and gasification of solid materials such as biomass pellets and municipal solid wastes. For the enhancement of fluidization and heat transfer, inert bed materials also exist in the beds. Becau…

Fpm-Se: A Numerical Model for Dense Gas-Solid Flows with Large Non-Spherical Object Open

Takuya Tsuji, Yuya Sakamoto, Shusaku Harada, Koshi Uemoto, Jun Oshitani , et al. · 2022

Discrete Particle Model for Soft Particle Systems Open

Takuya Tsuji · 2021

ハイドロゲルに代表されるソフト粒子多体系の力学特性は，粒子集団としての振る舞いに個々の粒子内部の変形の自由度が加わるため，大変複雑になると予想されるが，その詳細についてはほとんどわかっていない．本研究では，数値シミュレーションによるソフト粒子多体系の詳細な現象解明に向け，境界要素法（BEM）に基づく数値シミュレーションモデルの開発を試みた．第一段階として，単一のソフト粒子の変形挙動を対象とし，開発したモデルを用いて圧縮試験を行った．歪み―垂直力の関係について，変形量が小さい…

Coupling non-local rheology and volume of fluid (VOF) method: a finite volume method (FVM) implementation Open

Dorian Faroux, Kimiaki Washino, Takuya Tsuji, Toshitsugu Tanaka · 2021

Additional to a behavior switching between solid-like and liquid-like, dense granular flows also present propagating grain size-dependent effects also called non-local effects. Such behaviors cannot be efficiently modeled by standard rheol…

Resolved CFD–DEM coupling simulation using Volume Penalisation method Open

Giang Nguyen, Ei L. Chan, Takuya Tsuji, Toshitsugu Tanaka, Kimiaki Washino · 2020

A resolved CFD–DEM coupling model for the simulation of particulate flows is proposed in this work. The Volume Penalisation (VP) method, which is a family of the continuous forcing Immersed Boundary (IB) method, is employed to express the …

Dry separation of fine particulate sand mixture based on density-segregation in a vibro-fluidized bed Open

Jun Oshitani, Ryo Sugo, Yoshihide Mawatari, Takuya Tsuji, Zhaohua Jiang , et al. · 2020

Separation of fine particulate solid materials is one of most important unit operations in industry. Utilization of gas-solid fluidized beds has been considered where particulates are released from constraints due to contacts with surround…

Large-Scale DEM Simulation of Plate Drag in Dry Granular Materials Open

Murino Kobayakawa, Shinichiro Miyai, Takuya Tsuji, Toshitsugu Tanaka · 2020

Influence of Angle on Plate Penetration into Dense Granular Materials (Large-scale DEM Simulation Using Real Particle Size) Open

Shinichiro Miyai, Murino Kobayakawa, Takuya Tsuji, Toshitsugu Tanaka · 2019

Plate penetration into dry granular materials is numerically studied using a large-scale discrete element method (DEM). To investigate the effects penetration angle on the interactions between particles and the plate, the simulations with …

Influence of particle size on vertical plate penetration into dense cohesionless granular materials (large-scale DEM simulation using real particle size) Open

Shinichiro Miyai, Murino Kobayakawa, Takuya Tsuji, Toshitsugu Tanaka · 2019

The influence of the particle size on the vertical plate penetration into dense cohesionless granular materials was numerically investigated. Simulations were performed in quasi-two-dimensional conditions by changing the mean particle diam…

Interaction between dry granular materials and an inclined plate (comparison between large-scale DEM simulation and three-dimensional wedge model) Open

Murino Kobayakawa, Shinichiro Miyai, Takuya Tsuji, Toshitsugu Tanaka · 2019

The interaction between dry granular materials and an inclined plate is numerically studied using a three-dimensional discrete element method (DEM) simulation. In the simulation, a plate is dragged horizontally through densely packed dry g…

Reasearch Data Collection to Real-Time Magnetic Resonance Imaging of Bubble Behavior and Particle Velocity in Fluidized Beds: Research data (.mat files) and MATLAB scripts (.m files) to plot these data Open

Alexander Penn, Christopher M. Boyce, Thomas Kovar, Takuya Tsuji, Klaas P. Prüssmann , et al. · 2018

The following MATLAB scripts were used to generate the majority of the plots presented in the paper "Real-Time Magnetic Resonance Imaging of Bubble Behavior and Particle Velocity in Fluidized Beds" (DOI: 10.1021/acs.iecr.8b00932 Ind. Eng. …

Segregation of equal-sized particles of different densities in a vertically vibrated fluidized bed Open

Eduardo Cano-Pleite, F. Hernández-Jiménez, A. Acosta-Iborra, Takuya Tsuji, Christoph R. Müller · 2017

Special Invited Reviews “Numerical Simulations of Granular Flows” Open

Ryoichi Kurose, Takuya Tsuji, Chiharu Tokoro, Takashi Shirai, Satoshi Watanabe · 2017

Numerical Simulation of Dense Gas-Solid Two-Phase Flows Including Large Particles Open

Takuya Tsuji, Kyohei Higashida, Toshitsugu Tanaka · 2017

In a number of applications of dense gas-solid flows such as fluidized bed and pneumatic conveyer, the size of solid particles is not uniform and a large size difference exists. Because it is strongly related to the system efficiency, the …

Challenges for enhancing Fukushima environmental resilience (4) Open

Tsuyoshi Yaita, Mitsunori Honda, Iwao Shimoyama, Kenichi Ito, Yuzo Manpuku , et al. · 2017

本稿(第4回)では，1Fの事故後に伴う環境汚染に対して事故からの復興へ向けて取り組んだ減容化除染と再生利用に関連する研究への取り組みについて，日本原子力研究開発機構(JAEA)と国立環境研究所(NIES)が取り組んできた吸着機構の基礎から物理的除染および減容と熱処理に関する研究を紹介する。

Anomalous Sinking of Spheres due to Local Fluidization of Apparently Fixed Powder Beds Open

Jun Oshitani, Toshiki Sasaki, Takuya Tsuji, Kyohei Higashida, Derek Y. C. Chan · 2016

The sinking of an intruder sphere into a powder bed in the apparently fixed bed regime exhibits complex behavior in the sinking rate and the final depth when the sphere density is close to the powder bed density. Evidence is adduced that t…

The Mechanism and Challenge of Coordinated Core Metropolitan Area Initiative in Japan Open

Takuya Tsuji · 2015

Hindered Settling Velocity & Structure Formation during Particle Settling by Direct Numerical Simulation Open

Ali A. Zaidi, Takuya Tsuji, Toshitsugu Tanaka · 2015

Direct numerical simulation is used to study the dynamics of particle settling for Reynolds number from 0.1 to 50 and solid volume fraction from single particle to 0.4. The principle investigations are the effects of Reynolds number and so…

Development of Numerical Model for Drying Behavior of Particles Open

Takuya Tsuji · 2015

流動層は，乾燥や燃焼，ガス化といった熱物質輸送に関連したプロセスにおいて，広く用いられている．層内におけるこれらの輸送現象を実験的に計測することは容易ではなく，数値シミュレーションに基づいた層内固二相流れに対する理解促進が重要である．本研究では，現在流動層シミュレーションに広く用いられているDEM-CFDメゾスコピックモデル上において，熱物質輸送の取り扱いを可能とする拡張を行った．特に流動層中における湿潤粒子群の乾燥過程に着目し，これ表現できる計算モデルの開発を行った．シリ…

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