Turbulence Structure of Particle-Laden Flow in a Vertical Plane Channel Due to Vortex Shedding

Kajishima, Takeo; Takiguchi, S.; Hamasaki, Hiroyuki; Miyake, Yutaka

doi:10.1299/jsmeb.44.526

Cited by 255 publications

(189 citation statements)

References 21 publications

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“…For simplicity, hydrodynamic interactions between particles [15][16][17][18][19][20][21][22][23] are neglected in our simulation. The motion of a particle with mass m is given by…”

Section: Modelmentioning

confidence: 99%

Effect of container shape and walls on solidification of Brownian particles in a narrow system

et al. 2014

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We carry out Brownian dynamics simulations and study the ordering of particles under a uniform external force in a narrow system. In our previous studies [M. Sato et al., Phys. Rev. E 87, 032403 (2013); J. Phys. Soc. Jpn. 82, 084804 (2013)], we showed that the ordering of particles depends on the direction of the external force. In the studies, however, the system size and the number of particles are small, so the behaviors we observed corresponds to the motions in the initial stage of crystallization. In this paper, using a longer container and more particles, we investigate how solidification in a narrow system proceeds. We also study the effect of the shape of simulation box on the ordering of particles. When we use a rhomboid as a simulation box, the ratio of the particles with the face-centered cubic structure to those with the hexagonal close-packed structure is larger than that in a cuboid system.

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“…For simplicity, hydrodynamic interactions between particles [15][16][17][18][19][20][21][22][23] are neglected in our simulation. The motion of a particle with mass m is given by…”

Section: Modelmentioning

confidence: 99%

Effect of container shape and walls on solidification of Brownian particles in a narrow system

et al. 2014

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“…In order to examine solely the effect of size difference without deformation, we have executed simulations for binary suspensions of rigid bodies of different sizes, using Immersed Boundary method [4,5]. Figure 5 shows the results for small and large circular disks suspended in Poiseuille flow.…”

Section: Discussionmentioning

confidence: 99%

Simulation of binary dispersion system of droplets with size and surface tension difference under Couette flow

Makino

Sugihara‐Seki

2014

J Biorheol

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Blood is composed of red blood cells, leukocytes and platelets, which are dispersed in plasma. These particulate components have different size and stiffness. In blood flow, red blood cells are found to flow in the center of vessels. On the other hand, leucocytes and platelets are observed in the vicinity of wall of vessels. This phenomenon is called 'margination'. In this study, we simulate the behavior of binary droplet dispersion with size and surface tension differences under Couette flow, in order to investigate the mechanism of margination. We found that large floppy droplets migrate toward the center of channel, whereas small stiff droplets marginate near the wall of channel.

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“…The present authors have proposed another hybrid Lagrangian-Eulerian fixed-grid method of body-force type (Kajishima & Takiguchi, 2002;Kajishima, Takiguchi, Hamasaki, & Miyake, 2001) for solid objects immersed in a fluid. This method is characterized by the concept of a "velocity-field overridden by immersed solid (VOIS)".…”

Section: Overriding An Immersed Solidmentioning

confidence: 99%

“…The significant feature of our method is the property of "conservative momentum exchange (CMX)". This immersed solid approach was successfully applied to the direct numerical simulations of turbulent flow induced by the vortex shedding and the collective behaviors of more than 1000 solid particles (Kajishima et al, 2001). The method has been reformulated to allow arbitrary geometry for solid objects (Yuki, Takeuchi, & Kajishima, 2007).…”

Section: Overriding An Immersed Solidmentioning

confidence: 99%

Simulation of Fluid-Structure Interaction based on an Immersed-Solid Method

Kajishima¹,

Takeuchi²

2013

J MECH ENG SCI

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A new method for studying the interaction between an elastic object and a fluid has been developed. The fluid phase including solid interface is solved by our immersed solid method of body-force type. In the present study, the fluid-solid interaction force is incorporated into the finite-element method. This process is done by a superposition of the hydrodynamic force field with the solid internal force field. The inter-phase momentum exchange is implemented through the distributed force field shared by both Eulerian and moving Lagrangian references. In this paper, we demonstrate the recent results of our conservative momentum exchange algorithm for the fluid flow bounded by elastic walls. Examples include two-dimensional flows through a gap between modeled vocal cords, and some three-dimensional demonstrations.

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Turbulence Structure of Particle-Laden Flow in a Vertical Plane Channel Due to Vortex Shedding

Cited by 255 publications

References 21 publications

Effect of container shape and walls on solidification of Brownian particles in a narrow system

Effect of container shape and walls on solidification of Brownian particles in a narrow system

Simulation of binary dispersion system of droplets with size and surface tension difference under Couette flow

Simulation of Fluid-Structure Interaction based on an Immersed-Solid Method

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