Assessment of a scalar concentration (Komori) probe for measuring fluctuating dye concentration in water

Madhani, Jehangir T., Pendrey, David C., Situ, Rong, and Brown, Richard J. (2007) Assessment of a scalar concentration (Komori) probe for measuring fluctuating dye concentration in water. In: Proceedings of the 16th Australasian Fluid Mechanics Conference, pp. 815-818. From: 16th Australasian Fluid Mechanics Conference, 3-7 December 2007, Gold Coast, Australia.

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Abstract

The scalar (dye) concentration probe of Komori has been used at QUT to measure the dispersion of pollutants in rivers from outboard motors and the residence time distributions of stormwater quality improvement devices (SQIDs). Although usages have been documented in literature, little is known of the Komori (dye) probe’s frequency response characteristics and the quality of data sampled. In this work, the frequency response characteristic of the Komori probe was determined by injecting methylene blue dye upstream of the probe flume under varying flow conditions. Despite noise and drift, the data collected from the probe provided is useful because of its high frequency response in comparison to other types of tracer measurement. The rise and fall times were reported and the theoretical response time was also determined. It was found that the frequency response is a strong function of flow velocity and a maximum of 100 Hz under typical operating conditions is determined. Comparison between rise and fall time found that fall time takes longer time to dissipate.

Item ID: 21528
Item Type: Conference Item (Refereed Research Paper - E1)
ISBN: 978-1-864998-94-8
Date Deposited: 19 Jun 2012 22:41
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090508 Water Quality Engineering @ 50%
02 PHYSICAL SCIENCES > 0299 Other Physical Sciences > 029904 Synchrotrons; Accelerators; Instruments and Techniques @ 50%
SEO Codes: 96 ENVIRONMENT > 9606 Environmental and Natural Resource Evaluation > 960608 Rural Water Evaluation (incl. Water Quality) @ 50%
88 TRANSPORT > 8802 Water Transport > 880204 Passenger Water Transport @ 50%
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