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Proceedings Paper

Flow visualization using liquid crystals
Author(s): Shirley Ashforth-Frost; K. Jambunathan
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Paper Abstract

The application of liquid crystal thermography to the measurement of temperature/heat transfer in engineering is well established. Having gained practical experience in the use of liquid crystals for surface temperature and heat transfer determination, and the successful development and implementation of a digital image processing system for automatic analysis, their application has been extended to the simultaneous measurement of flow velocity and temperature by using a combined Liquid Crystal Thermography/Particle Image Velocimetry technique. Natural convection from a horizontal cylinder in an enclosure was chosen as the simple geometry to facilitate preliminary investigations. Water has been artificially seeded with micro-encapsulated liquid crystals and the natural convection flow field recorded on video to facilitate later analysis. By acquiring consecutive frames from the video the velocity magnitude throughout the flow field has been determined. The temperature field has been obtained from the same frames but using a manual technique.

Paper Details

Date Published: 2 December 1993
PDF: 9 pages
Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); doi: 10.1117/12.163707
Show Author Affiliations
Shirley Ashforth-Frost, Nottingham Trent Univ. (United Kingdom)
K. Jambunathan, Nottingham Trent Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 2005:
Optical Diagnostics in Fluid and Thermal Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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