Liquid crystal thermography and true-colour digital image processing

Stąsiek, J.; Stasiek, A.; Jewartowski, Marcin; Collins, Michael W.

doi:10.1016/j.optlastec.2005.06.028

Cited by 69 publications

(32 citation statements)

References 9 publications

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“…where T a is driving gas temperature, I is the electrical current and r is the electrical resistance of the heater [8].…”

Section: Steady State Analyses -Constant Flux Methodsmentioning

confidence: 99%

“…The relationship between the temperature of the crystal and the measured Hue of the reflected light defines the calibration curve for the specified liquid crystal [8]. The distribution of the colour component pattern on the liquid crystal layer was measured by RGB colour camera and a series of images at different temperature defines the calibration.…”

Section: Liquid Crystal Thermographymentioning

confidence: 99%

“…Two main methods of surface temperature measurements are performed involving steady state and transient techniques. A brief history of these is given by Baughn et al [1] and Stasiek [8].…”

Section: Liquid Crystal Thermographymentioning

confidence: 99%

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The use of liquid crystal thermography and particle image velocimetry in the exploration of heat transfer measurements

Stąsiek

Stasiek²,

Mikielewicz

et al. 2009

Proceedings of the Sixth International Symposium on Turbulence, Heat and Mass Transfer

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-Generation of vortices enhances heat transfer by swirl, flow destabilization and development of viscous layers. They may increase heat transfer by several hundred percent. Prior to the use of vortices to influence heat transfer it must be known how different vortices are generated and controlled, and how they interact with the base flow and temperature field. To select the most appropriate vortex generators (VG) for a given task it is necessary to know the heat transfer and flow losses associated with the generation of a specific vortex system. The aim of the paper is to asses the state of art and to encourage exploration of heat transfer control by vortices. Flow visualization and heat transfer experiments were conducted using an open low-speed wind tunnel equipped with Liquid Crystals Thermography (LCT) and Particle Image Velocimetry (PIV). In this work we consider five types of transverse vortex generators (TVGs) which where brought to required temperatures by the hot film method. Heat transfer measurements were carried out by LCT.

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“…where T a is driving gas temperature, I is the electrical current and r is the electrical resistance of the heater [8].…”

Section: Steady State Analyses -Constant Flux Methodsmentioning

confidence: 99%

Section: Liquid Crystal Thermographymentioning

confidence: 99%

See 1 more Smart Citation

The use of liquid crystal thermography and particle image velocimetry in the exploration of heat transfer measurements

Stąsiek

Stasiek²,

Mikielewicz

et al. 2009

Proceedings of the Sixth International Symposium on Turbulence, Heat and Mass Transfer

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show abstract

“…Thermochromic liquid crystals (TLCs) are increasingly being used as an accurate and convenient means of measuring surface temperature and heat-transfer coefficient because their optical properties are dependent on temperature in a predictable and repeatable manner [1][2][3][4][5][6]. TLCs, whose molecular structure changes with temperature, selectively reflect light at a wavelength characteristic of the local surface temperature.…”

Section: Introductionmentioning

confidence: 99%

A new method of temperature measurement using thermochromic liquid crystals (extension of measurable range based on spectral intensity in the narrow-band wavelength)

Toriyama

Tada

Ichimiya

et al. 2016

International Journal of Heat and Mass Transfer

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“…Since their discovery in 1889 by F. Reinitzer 1 , they have experienced an explosive growth because of their successful application in a wide variety of areas such as information displays 2 , cosmetics and health care 3 , thermography [4][5] , artificial muscle-like actuators [6][7] and enantioselective synthesis 8 , among others. Thus, liquid crystals play an important role in modern technology and they are present in the most common devices used in our daily live.…”

Section: Introductionmentioning

confidence: 99%

Polysiloxane Side-Chain Azobenzene-Containing Liquid Single Crystal Elastomers for Photo-Active Artificial Muscle-Like Actuators

García-Amorós¹,

Velasco²

2012

Advanced Elastomers - Technology, Properties and Applications

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Liquid crystal thermography and true-colour digital image processing

Cited by 69 publications

References 9 publications

The use of liquid crystal thermography and particle image velocimetry in the exploration of heat transfer measurements

The use of liquid crystal thermography and particle image velocimetry in the exploration of heat transfer measurements

A new method of temperature measurement using thermochromic liquid crystals (extension of measurable range based on spectral intensity in the narrow-band wavelength)

Polysiloxane Side-Chain Azobenzene-Containing Liquid Single Crystal Elastomers for Photo-Active Artificial Muscle-Like Actuators

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