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Session: Novel experimental measurement methods II
Session starts: Tuesday 04 November, 14:50
Presentation starts: 15:30
Room: Lecture room A

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Jawahar Prakash J (IIT Madras)
Advaith S (IIT Madras)
Ganesan A.R (IIT Madras)
Mani A (IIT Madras)

Abstract:
The present study investigates the evaporation dynamics of a sessile acetone droplet on an aluminium substrate using digital holography and Fourier Transform Profilometry (FTP). A Mach-Zehnder Interferometer with a red laser (632 nm) is employed to record images for this analysis. The reference image is captured prior to placing the droplet, while the object image is recorded after placing the droplet. By computing the phase difference between these holograms, the evolution of the droplet evaporation profile is determined. The phase difference is correlated with the refractive index variations in the surrounding air, enabling the reconstruction of the vapor concentration field. This non-intrusive optical approach provides an accurate, high-resolution method to visualize droplet evaporation processes.