9 citations · 20 across the 14 of their papers we have counts for
16 papers
Attraction-controlled torque organization and rotational states in frictional granular matter
Kiwamu Yoshii
In this study, we numerically investigate how interparticle attraction affects stress transmission, torque organization, and particle rotation in a two-dimensional frictional granu…
Vibrational Mpemba relaxation in a linear damped elastic system
Kiwamu Yoshii, Satoshi Takada, Satoshi Takasa
We show that a linear damped elastic system can display a Mpemba-like reversal of vibrational relaxation without any nonlinear constitutive response or amplitude-dependent damping.…
A semi-analytic model of the bouncing barrier for protoplanetary dust aggregates
Sota Arakawa, Haruto Oshiro, Yuki Yoshida +1
Collisional bouncing limits the growth of dust aggregates in protoplanetary disks, but its dependence on aggregate size, collision velocity, and filling factor remains poorly under…
Revisiting the Stress Field Inside an Elastic Sphere Subjected to a Concentrated Load
Yosuke Mori, Kiwamu Yoshii, Satoshi Takada
We present a complete analytical solution for the stress field inside a homogeneous, inside a homogeneous, linearly elastic solid sphere subjected to a concentrated normal load app…
Cohesion-induced hysteresis and breakdown of marginal stability in jammed granular materials
Michio Otsuki, Kiwamu Yoshii, Hideyuki Mizuno
The dependence of mechanical properties on microscopic interactions remains a central problem in the physics of disordered solids near the jamming transition. We numerically and th…
Dynamics of particle lane formation in confined viscoelastic fluids under shear
Hiroto Yokoyama, Masanori Honda, Rinya Miyakawa +5
Simple shear flow can induce flow-aligned chain formation of particles suspended in viscoelastic fluids. Although this phenomenon has been reported for decades, direct {\it in situ…
Arrested coarsening in active colloidal suspensions driven by nonreciprocal electrohydrodynamic interactions
Shoma Hara, Masazumi Okada, Keisuke Kittaka +5
Nonreciprocal interactions have recently attracted growing interest in nonequilibrium physics. In particular, breaking action-reaction symmetry has been proposed as a mechanism for…
Dislocation Glides in Monolayered Granular Media: Effect of Lattice Constant
Fumiaki Nakai, Takashi Uneyama, Yuto Sasaki +2
A recent study demonstrated that granular crystals containing a single dislocation exhibit dislocation glide analogous to that observed in atomic-scale crystals, resulting in plast…
Dislocation Glides in Granular Media
Fumiaki Nakai, Takashi Uneyama, Yuto Sasaki +2
Atomic crystals with dislocations deform plastically at low stresses via dislocation glide. Whether dislocation glide occurs in macroscopic frictional granular media has remained u…
Reducing segregation in vibrated binary-sized granular mixtures by excessive small particle introduction
Fumiaki Nakai, Kiwamu Yoshii
We numerically examine binary-sized granular mixtures confined between two parallel walls subjected to vertical vibration using the discrete element method. For a size ratio of …
Critical scaling for dense granular flow between parallel plates near jamming
Michio Otsuki, Kenta Hayashi, Kiwamu Yoshii
We numerically study the flow of dense granular materials between parallel plates driven by an external force. The granular materials form a jammed solid-like state when the extern…
Pattern transition of flow dynamics in a highly water-absorbent granular bed
Kojiro Otoguro, Kiwamu Yoshii, Yutaka Sumino
An aqueous sodium chloride solution was injected at a controlled rate into a granular bed in a quasi-two-dimensional cell. The granular bed was made of dried, highly water-absorben…
Rheology of dilute granular gas mixtures where the grains interact via a square shoulder and well potential
Kiwamu Yoshii, Satoshi Takada, Kosuke Kurosawa +1
We develop the rheology of a dilute granular gas mixture. Motivated by the interaction of charged granular particles, we assume that the grains interact via a square shoulder and w…
Mechanical and geometrical properties of jammed wet granular materials
Kiwamu Yoshii, Michio Otsuki
We numerically investigate the mechanical and geometrical properties of dense wet granular particles with irreversible attractive interaction. The shear modulus exhibits two inflec…
Aversion of face-to-face situation of pedestrians eases crowding condition
Sho Yajima, Kiwamu Yoshii, Yutaka Sumino
We conducted numerical simulation for a crowd of pedestrians. Each pedestrian, modeled with three circles, has a shape whose long axis is perpendicular to the anteroposterior axis,…
Extensive tip-splitting of injected organic liquid into an aqueous viscoelastic fluid
Kiwamu Yoshii, Kojiro Otoguro, Ayane Pygoscelis Sato +1
The injection of a fluid into another fluid causes a spatiotemporal pattern along the injection front. Viscous fingering is a well-known example when the replaced material is a vis…