Thermochromic liquid crystals in heat transfer research

• Autorzy: Kowalewski T. A. , Stąsiek J.
• Konferencja: X Sympozjum Wymiany Ciepła i Masy (14-18.09.1998 ; Świeradów Zdrój)
• Języki publikacji: EN

Abstrakty

EN

In recent years Thermochromic Liquid Crystals (TLC) have been successfully used in non-intrusive heat transfer and fluid mechanics studies. Thin coatings of TLCs at surfaces utilised to obtain detailed heat transfer data of steady or transient process. Application of TLC tracers allows instantaneous measurement of the temperature and velocity fields for two-dimensional cross-section of flow. Computerised flow visualisation techniques allow automatic quantification of temperature of the analysed surface or the visualized flow cross-section. Here we present review of the development of automated techniques for analysing thermal and flow images we used over past 15 years. The methods are based on computerised true - colour analysis of digital images for temperature measurements and modified Particle Image Velocimetry used to obtain the flow field velocity. Examples given for both surface and flow field measurements demonstrate significance of the method for validation of numerical codes.

Słowa kluczowe

EN

temperature measurement; liquid crystal thermography; particle image velocimetry; particle image thermometry

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Techniki Cieplnej i Mechaniki Płynów Politechniki Wrocławskiej. Konferencje
• Rocznik: 1998
• Tom: Vol. 53, nr 9
• Strony: 407--424
• Opis fizyczny: Bibliogr. 42 poz., rys. 21

Twórcy

autor

Kowalewski T. A.

autor

Stąsiek J.

• IPPT PAN Polish Academy of Sciences 00-049 Warszawa Poland