10 citations · 49 across the 12 of their papers we have counts for
7 papers · 1 filter
Amplified transport variability in granular slope flows near the critical angle
Fumiaki Nakai, Yuto Sasaki
Mechanical disturbances such as seismic shaking can set a granular slope in motion. Understanding the resulting transport before arrest is important for predicting topographic chan…
Granular Rods Fall Faster in Denser Obstacle Fields
Fumiaki Nakai, Hiroaki Katsuragi
How does particle shape affect driven transport through obstacle fields? We simulate a dissipative rod falling under gravity through randomly placed fixed obstacles. For sufficient…
Steady shear rheology of a granular crystal containing a single dislocation
Fumiaki Nakai
Monodisperse granular particles can form crystals whose yielding behavior is strongly affected by dislocations and differs markedly from that of conventional amorphous granular mat…
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…
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 …
Gas Diffusion in Cement Pastes: An Analysis using a Fluctuating Diffusivity Model
Fumiaki Nakai, Takato Ishida
This work propose an application of the concept of fluctuating diffusivity to the diffusion of gas molecules in cementitious materials, particularly through a two-state fluctuating…
Effect of Inertia on Linear Viscoelasticity of Harmonic Dumbbell Model
Takashi Uneyama, Fumiaki Nakai, Yuichi Masubuchi
The overdamped (inertialess) dumbbell model is widely utilized to study rheological properties of polymers or other soft matters. In most cases, the effect of inertia is merely neg…