39 citations · 322 across the 36 of their papers we have counts for
7 papers · 1 filter
Stability of transverse dunes against perturbations; a theoretical study using dune skeleton model
H. Niiya, A. Awazu, H. Nishimori
The dune skeleton model is a reduced model to describe the formation process and dynamics of characteristic types of dunes emerging under unidirectional steady wind. Using this mod…
Segregation pattern reorientation of granular mixture on horizontally oscillating tray
Masashi Fujii, Akinori Awazu, Hiraku Nishimori
Reorientation of the segregation pattern of a binary granular mixture on a two-dimensional hor- izontally oscillating tray is numerically realized. The mixture consists of large-an…
Bifurcation analysis of the transition of dune shape under unidirectional wind
Hirofumi Niiya, Akinori Awazu, Hiraku Nishimori
A bifurcation analysis of dune shape transition is made. By use of a reduced model of dune morphodynamics, dune skeleton model, we elucidate the transition mechanism between differ…
3D Dune Skeleton Model as a Coupled Dynamical System of 2D Cross-Sections
Hirofumi Niiya, Akinori Awazu, Hiraku Nishimori
To analyze theoretically the stability of the shape and the migration process of transverse dunes and barchans, we propose a {\it skeleton model} of 3D dunes described with coupled…
Localized bioconvection of Euglena caused by phototaxis in the lateral direction
N. J. Suematsu, A. Awazu, S. Izumi +2
Euglena, a swimming micro-organism, exhibited a characteristic bioconvection that was localized at the center of a sealed chamber under bright illumination to induce negative photo…
Counter Chemotactic Flow in Quasi-One-Dimensional Path
Masashi Fujii, Akinori Awazu, Hiraku Nishimori
Quasi-one-dimensional bidirectional particle flow including the effect of chemotaxis is investigated through a modification of the John-Schadschneider-Chowdhury-Nishinari model. Sp…
Is relaxation to equilibrium hindered by transient dissipative structures in closed systems?
Akinori Awazu, Kunihiko Kaneko
Dissipative structures are generally observed when a system relaxes from a far from equilibrium state. To address the reverse question given by the title, we investigate the relaxa…