Velocity distribution in a granular gas

Cirkel, Jasper Ole

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Velocity distribution in a granular gas

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Cirkel, Jasper Ole
Group Statistical mechanics of granular media, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Cirkel, J. O. (2012). Velocity distribution in a granular gas. Bachelor Thesis, Georg-August-Universität, Göttingen.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-8445-A

Abstract

We create a granular gas composed of table tennis balls, and study their behaviour when being shaken vertically. Using techniques of digital particle image velocimetry (DPIV), the two-dimensional velocity distribution and anisotropy of temperature is of particular interest. A high speed camera is set up and supplied with enough lighting to illuminate balls moving at the order of metres per second (ms−1). A shaker provides vertical movement and different structured ground plates are used in order to excite the particles equally in all directions. The images are processed by a routine implemented in Matlab. We find that the velocity distribution is both dependent on the structure of the ground plate and the observed position in the container.