Experiments in Fluids

, Volume 50, Issue 1, pp 65–73 | Cite as

Combined two-dimensional velocity and temperature measurements of natural convection using a high-speed camera and temperature-sensitive particles

  • Satoshi SomeyaEmail author
  • Yanrong Li
  • Keiko Ishii
  • Koji Okamoto
Research Article


This paper proposes a combined method for two-dimensional temperature and velocity measurements in liquid and gas flows using temperature-sensitive particles (TSPs), a pulsed ultraviolet laser, and a high-speed camera. TSPs respond to temperature changes in the flow and can also serve as tracers for the velocity field. The luminescence from the TSPs was recorded at 15,000 frames per second as sequential images for a lifetime-based temperature analysis. These images were also used for the particle image velocimetry calculations. The temperature field was estimated using several images, based on the lifetime method. The decay curves for various temperature conditions fit well to exponential functions, and from these the decay constants at each temperature were obtained. The proposed technique was applied to measure the temperature and velocity fields in natural convection driven by a Marangoni force and buoyancy in a rectangular tank. The accuracy of the temperature measurement of the proposed technique was ±0.35–0.40°C.


Particle Image Velocimetry Natural Convection Rayleigh Number Decay Constant Laser Induce Fluorescence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was partially supported by Grant-in-Aid for Young Scientists (B) 20760129 and TEPCO research foundation.


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Satoshi Someya
    • 1
    • 2
    Email author
  • Yanrong Li
    • 2
  • Keiko Ishii
    • 2
  • Koji Okamoto
    • 2
  1. 1.Energy Technology Research Institutes of AISTTsukubaJapan
  2. 2.Department of Human and Engineered Environmental Studies, Graduate School of Frontier ScienceThe University of TokyoKashiwaJapan

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