Undulations of a Thin Granular Layer Induced by Vertical Vibration
スポンサーリンク
概要
- 論文の詳細を見る
An experimental study is performed on quasi-two dimensional waves in a thin granular layer of thickness h induced by vertical vibration with frequency f and amplitude a under atmospheric pressure. We used sesame of oval shape as well as different sizes of spherical glass and aluminum beads. Irrespective of the container size L, "ripples" are observed in a thin layer which consists of spherical beads (aluminum and glass beads) for relatively small acceleration of external forcing. On the other hand "undulations" are observed in a thicker layer, which consists of sesame as well as spherical beads, for larger accelerations. In the latter, several eigen modes are observed, which is reminiscent of the buckling and bending waves in an elastic rod. Continuum model is shown to explain the observed modes. In addition to acceleration amplitude (2πf)^2a/g (g: acceleration of gravity) and normalized frequency f√<h/g>, layer height h/d (d: particle size) and aspect ratio L/h play important roles.
- 社団法人日本物理学会の論文
- 2003-06-15
著者
-
Sano Osamu
Department Of Applied Physics Faculty Of Engineering University Of Tokyo
-
Ugawa Akiko
Department Of Applied Physics Tokyo University Of Agriculture And Technology
関連論文
- Hydrodynamical Resistance of a Smooth Muscle Myosin Molecule and Its Application to Conformational Changes Associated with Phosphorylation
- Surface Tension Driven Oscillatory Motion of a Mercury Drop in the Presence of Concentration Gradient of K_2 Cr_2 O_7 in HNO_3 Solution
- A study of tensile strain in upper surface of rock slope using barodynamics experiment
- Formation of Barchans and Ripples due to Steady Viscous Flow in an Annular Channel(Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid mechanics)
- Experiment on Vibration-Induced Pattern Formation of a Vertically Thin Granular Layer(Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics and Fluid Mechanics)
- Experimental study on the interaction of two two-dimensional circular holes placed in a uniform viscous flow in a porous medium
- Slow Motion of a Small Sphere in a Viscous Fluid in a Corner : I. Motion on and across the Bisector of a Wedge
- An Experimental Study of the Thermal Convection in a Vertical Torus
- Convection Diffusion in Hexagonal Rayleigh-Benard Cell
- Undulations of a Thin Granular Layer Induced by Vertical Vibration
- Undulations of a Thin Granular Layer Induced by Vertical Vibration
- Sedimentation of a Small Sphere in a Viscous Fluid Bounded by Two Perpendicular Walls
- A note on the drag reduction of a circular cylinder due to double rows of holes
- Viscous Flow past a Circular / Spherical Void in Porous Media-An Application to Measurement of the Velocity of Ground water by the Single Boring Method : Classical Phenomenology and Applications
- Slow Motion of a Spherical Particle in a Viscous Fluid Bounded by Two Perpendicular Walls
- Surface Tension Driven Random Motion of a Mercury Drop in HNO_3 and K_2Cr_2O_7 Solution
- Dispersion Relation of Standing Waves on a Vertically Oscillated Thin Granular Layer(Cross-disciplinary Physics and Related Areas of Sciene and Technology)
- Deformation of a Neutrally Buoyant Drop of Magnetic Fluid Excited Non-intrusively by an External Magnetic Field
- Pattern Formation on the Vertically Vibrated Granular Layer
- Deformation of a Liquid Drop Due to Rotation. II. Hydrodynamical Analysis of the Velocity Field at Relatively Low Rate of Rotation