Particle Image Thermography using thermochromic liquid crystals
Heat transfer problems are commonplace in modern science and engineering and their solutions are the basis of many technological developments. Experimental techniques to study heat transfer phenomena in fluid mechanics play a substantial role in the understanding of the flow dynamics and thermal effects. Thermochromic liquid crystal (TLC) thermography has been developed over many years into a reliable method to reconstruct the temperature field of a fluid flow and, at the UniBw, it has been extended to the tracking of temperature in individual TLC particles. The microfluidics group, along with their partners at the TU Braunschwieg, are developing custom non-encapsulated TLC micro spheres, suitable for individual thermal tracking in micro flows. A multi-variable calibration approach is used to establish a relationship between the color characteristics of particle images with their corresponding temperature. The calibration procedure provides unprecedented uncertainty levels in individual particle thermography research.
Funded by the Deutsche Forschungsgemeinschaft (DFG).
Partner: TU Braunschweig
Contacts: M.Sc. Rodrigo Segura