Particle image thermometry for natural convection flows

Bednarz, T.P., Lei, C., and Patterson, J.C. (2007) Particle image thermometry for natural convection flows. In: 16th Australasian Fluid Mechanics Conference, pp. 1165-1170. From: 16th Australasian Fluid Mechanics Conference, 3-7 DEC 2007, Gold Coast, QLD, Austrlia.

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Abstract

Particle Image Thermometry (PIT) is a technique by which temperature fields can be obtained non-invasively using thermochromic liquid crystals (TLCs) through image processing of experimental true-colour photographs. This is done using a calibration curve (hue versus temperature). With the calibration data, every pixel of the colour photograph is transformed to a temperature value, and thus accurate experimental temperature maps are obtained. Using this technique, examples of steady and unsteady natural convection are presented, which include steady magnetic convection of paramagnetic fluids in a cubic enclosure heated and cooled from opposite walls, and unsteady convective flows in a reservoir model cooled from above (night-time cooling). The instantaneous measurement of temperature fields is very useful for understanding flow characteristics in situations where conventional flow visualisation is not sufficient. This method also provides additional quantitative information for comparisons with numerical modelling.

Item ID: 3166
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: natural convection; PIT; temperature measurement; thermochromic liquid crystals; fluid mechanics
Additional Information:

ISBN: 978-1-86499-894-8
Date Deposited: 09 Oct 2009 05:56
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 60%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 30%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091508 Turbulent Flows @ 10%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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