Infrared thermography as a heat tracer method for velocity estimation in shallow flows

Rui P. De Lima, Theodore G. Cleveland, Rita R. De Carvalho

Research output: Contribution to journalArticle

Abstract

This work presents a technique that uses infrared thermography to estimate mean flow velocity, based on the time of travel of a heat tracer (hot water). A thermographic camera, installed above a flume, allows the visualization of the water surface temperature. When hot water is added to the flow, it appears in the footage as a bright mass moving downstream. This allows the quantification of its surface velocity, which corresponds to flow velocity (shallow flows). As a control, results were compared with the measurements obtained by an Acoustic Doppler Velocimeter. This technique is particularly suitable for measurements in shallow flows, where most common flow velocity equipment reveal some limitations due to incompatibilities with low water depths.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalBodenkultur
Volume65
Issue number3-4
StatePublished - 2014

Keywords

  • Flow velocity
  • Heat tracer
  • Infrared thermography
  • Overland flow
  • Shallow flow

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