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    Phase doppler flux comparisons

    Roten, Rory; Post, Scott; Hewitt, Andrew
    Abstract
    The movement of droplets in time and space (i.e. flux) is essential to know when measuring and/or predicted spray drift via agricultural application. A study was performed to assess the flux measurements of a phase Doppler system against the standard string derived flux in a wind tunnel. The primary objective of the study was to compare flux from a new phase Doppler system against 1.7 mm cotton and 2.0 mm nylon strings at varying wind speeds (5, 15, 30, 45, and 60 km/h) and spray exposures times (5, 10, 15, 30, and 60 s) with an overarching hypothesis that the active, phase Doppler would be able to accurately measure the flux regardless of exposure and spray mass whereas the static string samplers will be limited to an undefined maximum retention. The phase Doppler did measure as linearly as expected, however strings did not reach a point in which they loss mass; conversely, they appear to be overloading. These findings are believed to be among many variables which influence the high variance of past mass balance works reported in the literature.... [Show full abstract]
    Keywords
    phase doppler; flux; spray drift; droplets; string sampler
    Fields of Research
    0799 Other Agricultural and Veterinary Sciences
    Date
    2016-07
    Type
    Conference Contribution - published (Conference Paper)
    Collections
    • Lincoln Agritech [64]
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    DOI
    https://doi.org/10.13031/aim.20162461508
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