New Thermochromic Liquid Crystals

1984 ◽  
pp. 305-312 ◽  
Author(s):  
D. G. McDonnell ◽  
I. Sage
Keyword(s):  
Liquid Crystals ◽  
Thermochromic Liquid Crystals

scholarly journals Optimization of Transient Heat Transfer Measurements Using Thermochromic Liquid Crystals Based on an Error Estimation

1996 ◽  
Author(s):  
Rainer Höcker
Keyword(s):  
Heat Transfer ◽  
Liquid Crystals ◽  
Measurement Techniques ◽  
Analytical Investigation ◽  
Transient Heat Transfer ◽  
Critical Parameters ◽  
Transfer Experiment ◽  
Transfer Measurement ◽  
Thermochromic Liquid Crystals ◽  
The Individual

An analytical investigation has been made to identify and quantify critical parameters influencing the final result of a transient heat transfer experiment. The aim was to obtain a set of dimensionless parameters, that describe the interaction of the individual measured quantities in a compact form. Among the wide variety of different kinds of heat transfer measurement techniques, the transient method, employing thermochromic liquid crystals, is very useful. It gives much detailed heat transfer information with a minimum effort in experimental time. The present paper focuses on this technique, although it is not the only choice for all kinds of applications, but it is the currently most frequently used one. This paper provides the means to lay out an experiment, so that it yields acceptable results with respect to the constraints for a set of test boundary conditions.

Thermochromic Liquid Crystals for Particle Image Thermometry

2015 ◽  
pp. 3272-3279
Author(s):  
Rodrigo Segura ◽  
Christian Cierpka ◽  
Massimiliano Rossi ◽  
Christian J. Kähler
Keyword(s):  
Liquid Crystals ◽  
Particle Image ◽  
Thermochromic Liquid Crystals

Thermal optimisation of the Reimer–Tiemann reaction using thermochromic liquid crystals on a microfluidic reactor

Lab on a Chip ◽  
2005 ◽  
Vol 5 (5) ◽  
pp. 540 ◽  
Author(s):  
Alexander Iles ◽  
Robin Fortt ◽  
Andrew J. de Mello
Keyword(s):  
Liquid Crystals ◽  
Microfluidic Reactor ◽  
Thermochromic Liquid Crystals

Experimental investigation of local heat transfer for complex-shaped surfaces using thermochromic liquid crystals

2016 ◽  
Vol 59 (2) ◽  
pp. 218-223
Author(s):  
I. N. Baibuzenko ◽  
A. A. Sedlov ◽  
V. L. Ivanov
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Liquid Crystals ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Thermochromic Liquid Crystals

Infrared Thermography With In-Situ Calibration Using Thermochromic Liquid Crystals Applied to Film Cooling

2004 ◽  
Author(s):  
Dennis Brauckmann ◽  
Jens von Wolfersdorf
Keyword(s):  
Liquid Crystals ◽  
Infrared Thermography ◽  
Film Cooling ◽  
Test Surface ◽  
Surface Distribution ◽  
Cooling Effectiveness ◽  
Film Cooling Effectiveness ◽  
In Situ Calibration ◽  
Thermochromic Liquid Crystals

This paper presents an application of infrared thermography measurements on a film cooled flat surface using a single cylindrical film cooling hole. Infrared thermography (IR) is used to obtain the full field surface distribution of the temperature and therefore the film cooling effectiveness. For accurate results in-situ calibration of the infrared radiation intensity during the experiment needs to be performed, which is usually done using surface mounted thermocouples. For the near hole region thermochromic liquid crystals (TLC) are applied to obtain additional information for the calibration. A mixture of two narrow band TLCs is used, leading to discrete temperature lines on the surface. Using small variations in the test temperature settings, the TLC-lines can be located on the test surface into the regions of interest and the influence on the obtained infrared calibration results can be investigated. Experimental results for the film cooling effectiveness are presented for several blowing rates.

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