Development and application of spatial carrier interferometry for whole field real-time investigation of temperatures in liquid media

0511761 - ÚFP 2020 RIV NL eng J - Journal Article
Psota, P. - Dančová, P. - Cubreli, G. - Lédl, V. - Vít, T. - Doleček, R. - Matoušek, Ondřej
Development and application of spatial carrier interferometry for whole field real-time investigation of temperatures in liquid media.
International Journal of Thermal Sciences. Roč. 145, November (2019), č. článku 106029. ISSN 1290-0729. E-ISSN 1778-4166
Institutional support: RVO:61389021
Keywords : holographic-interferometry * reynolds-number * flow * sensor * Interferometry * Spatial carrier * Fourier transform * Temperature field * Convection * Water
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.476, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S129007291832129X?via%3Dihub

This paper presents interferometric measurement of dynamic phenomena in transparent media. The method is based on differential spatial carrier interferometry that provides interesting features for experimental fluid mechanics. The method is particularly suitable for progressively changing phenomena. Temperature is automatically evaluated from a single interferogram, and a differential approach allows to decrease dynamic range of the measurement. As a consequence, in case of high temporal sampling of the phenomena, no spatial phase unwrapping is needed. Otherwise, the spatial unwrapping is performed on low fringe density phase maps and the fringe order is unambiguously determined. The interferometric method was experimentally tested by measuring dynamically varying temperature fields in water. The inspected phenomenon was a convection of water layers within a glass tank, where a heat sink was positioned at the bottom of the tank. Interferometric and temperature measurements were simultaneously conducted. Temperature was measured using four thermocouples to verify the reliability of the method. Results of both approaches are in a good agreement.
Permanent Link: http://hdl.handle.net/11104/0301986