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SelkerJohnBioEcoEngineeringActive-DistributedTemperature.pdf

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https://ir.library.oregonstate.edu/concern/articles/1c18dk94v

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Abstract
  • We show how a distributed borehole flowmeter can be created from armored Fiber Optic cables with the Active-Distributed Temperature Sensing (A-DTS) method. The principle is that in a flowing fluid, the difference in temperature between a heated and unheated cable is a function of the fluid velocity. We outline the physical basis of the methodology and report on the deployment of a prototype A-DTS flowmeter in a fractured rock aquifer. With this design, an increase in flow velocity from 0.01 to 0.3 m s⁻¹ elicited a 2.5°C cooling effect. It is envisaged that with further development this method will have applications where point measurements of borehole vertical flow do not fully capture combined spatiotemporal dynamics.
  • Keywords: Heated, Fiber optics, Borehole, Flowmeter, A-DTS
  • Keywords: Heated, Fiber optics, Borehole, Flowmeter, A-DTS
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