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    Collective phenomena in granular and atmospheric electrification

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    Description and instructions regarding the data sets (13.03Kb)
    No. of downloads: 81

    Information on all particle types used (3.547Kb)
    No. of downloads: 47

    Characterization of all the powders (5.937Mb)
    No. of downloads: 25

    Files containing images and codes regarding particle arrangements. (6.287Mb)
    No. of downloads: 23

    Voltage and position time series for a discharge (594.7Kb)
    No. of downloads: 45

    Voltage and position time series for many cycle profiles (126.5Mb)
    No. of downloads: 21

    Voltage and position time series for 10 to 325 micron PS powder (562.1Mb)
    No. of downloads: 17

    Voltage and position time series for 610 to 990 micron PS spheres (623.8Mb)
    No. of downloads: 37

    An hdf5 file of time series for a discharge (93.45Kb)
    No. of downloads: 46

    Voltage and position time series for many cycle profiles (101.6Mb)
    No. of downloads: 19

    Voltage and position time series for 10 to 325 micron PS powder (465.6Mb)
    No. of downloads: 16

    Voltage and position time series for 750 to 1000 micron glass spheres (598.3Mb)
    No. of downloads: 13

    Voltage and position time series for 610 to 990 micron PS spheres (503.1Mb)
    No. of downloads: 15

    Voltage and position time series for 750 to 1000 micron glass spheres (483.7Mb)
    No. of downloads: 15

    Date
    2015-07-29
    Author
    Nordsiek, Freja
    Lathrop, Daniel
    DRUM DOI
    https://doi.org/10.13016/M2ZK87
    Metadata
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    Abstract
    This repository contains data from the Granular Electrification Experiment in the University of Maryland Nonlinear Dynamics Lab. The experiment consists of a cylindrical cell with aluminum plates on the top and bottom. The cell is filled with granular particles and shaken vertically for several cycles. The vertical position of the cell and the electric potential between the top and bottom endplates of the cell are acquired. The data in this repository is from experiments in which the cylindrical cell is filled with only one type of particle. One exception uses two types of particles, pointed out below. A particle type is comprised of its material, form (spheres or powder), and size range. The acceleration timeseries of the shaking is approximately a square wave with amplitude a, meaning that the vertical position is approximately a sequence of parabolas of alternating concavity. The stroke-length of the oscillation is 10.0 cm. The shaking strength is quantified as a/g where g is the free fall acceleration due to gravity on Earth. The amount of particles is quantified by the dimensionless parameter lambda = 2 N_p d^2 / (3 D^2) where N_p is the number of particles, d is the particle diameter (or effective diameter), and D is the diameter of the cell.
    Notes
    See README.txt
    URI
    http://hdl.handle.net/1903/16867
    Collections
    • Geology Research Works
    • Physics Research Works
    • UMD Data Collection

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    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility