TY - JOUR

T1 - An Experimental Study of Heat Transfer at the Interface between Two Immiscible Liquids Using Two-Color PLIF Method

AU - Zotyeva, A. A.

AU - Nichik, M. Yu.

AU - Dulin, V. M.

N1 - Zotyeva, A. A. An Experimental Study of Heat Transfer at the Interface between Two Immiscible Liquids Using Two-Color PLIF Method / A. A. Zotyeva, M. Yu. Nichik, V. M. Dulin // Journal of Engineering Thermophysics. – 2026. – Vol. 35, No. 1. – P. 81-90. – DOI 10.1134/S1810232826010091. – EDN EYUJWP. This research was supported by the Ministry of Science and Higher Education of the Russian Federation (grant 075-15-2025-007, https://megagrant.ru/labs/lab_rus_1082740/) (contributions by A. A. Zotyeva and M. Yu. Nichik) and the Russian Science Foundation (RSF) (grant 19-79-30075, https://rscf.ru/project/19-79-30075/) (contribution by V. M. Dulin, development of the calibration procedure). The equipment was provided under a state contract of IT SB RAS

PY - 2026/9/4

Y1 - 2026/9/4

N2 - This study aims to enhance the accuracy and reliability of temperature measurements in liquid films and droplets using an extended two-color/two-dye planar laser-induced fluorescence (2C/2D PLIF) method. The experiment employs Kiton Red (temperature-sensitive) and Rhodamine 6G (temperature-insensitive) dyes to compensate for concentration fluctuations and environmental effects. A calibrated setup with synchronized cameras, optical filters, and a pulsed laser is used to capture the fluorescence intensities of glycerol and oil emulsions. The key results demonstrate a successful reconstruction of the temperature fields with a spatial resolution of 138 pixels/mm and an RMS error below 5%, validated against thermocouple measurements. The most significant finding is that the method resolves thermal gradients in both stratified and mixed-phase systems, though optical distortions at the interfaces pose challenges. The major conclusion highlights the potential of the 2C/2D PLIF method for high-resolution, non-contact thermometry in combustion and heat transfer applications, future improvements being needed to address interfacial artifacts.

AB - This study aims to enhance the accuracy and reliability of temperature measurements in liquid films and droplets using an extended two-color/two-dye planar laser-induced fluorescence (2C/2D PLIF) method. The experiment employs Kiton Red (temperature-sensitive) and Rhodamine 6G (temperature-insensitive) dyes to compensate for concentration fluctuations and environmental effects. A calibrated setup with synchronized cameras, optical filters, and a pulsed laser is used to capture the fluorescence intensities of glycerol and oil emulsions. The key results demonstrate a successful reconstruction of the temperature fields with a spatial resolution of 138 pixels/mm and an RMS error below 5%, validated against thermocouple measurements. The most significant finding is that the method resolves thermal gradients in both stratified and mixed-phase systems, though optical distortions at the interfaces pose challenges. The major conclusion highlights the potential of the 2C/2D PLIF method for high-resolution, non-contact thermometry in combustion and heat transfer applications, future improvements being needed to address interfacial artifacts.

KW - 2C/2D PLIF

KW - Kiton Red

KW - Rhodamine 6G

KW - emulsions

KW - 2C/2D PLIF

KW - красный краситель Kiton

KW - Kiton Red

KW - родамин 6G

KW - эмульсии

UR - https://www.mendeley.com/catalogue/77fd64da-8475-36b3-ba39-17e0abbac4c5/

UR - https://www.scopus.com/pages/publications/105049298543

UR - https://elibrary.ru/item.asp?id=92019529

U2 - 10.1134/S1810232826010091

DO - 10.1134/S1810232826010091

M3 - Article

VL - 35

SP - 81

EP - 90

JO - Journal of Engineering Thermophysics

JF - Journal of Engineering Thermophysics

SN - 1810-2328

IS - 1

ER -