Investigation of the preferential evaporation of fuel mixtures in levitated single droplets

Klevansky B, Huschka V, Petschow AC, Bauer F, Hasse C, Will S (2026)

Publication Type: Journal article

Publication year: 2026

Journal

Fuel Elsevier

Book Volume: 421

Article Number: 139040

DOI: 10.1016/j.fuel.2026.139040

Abstract

The blending of alternative fuels like ethanol with conventional fuels significantly alters their evaporation properties, which directly impacts combustion behavior. While previous studies have utilized droplet levitation to investigate evaporation dynamics and compared them to the classical D2-law of Langmuir, a deeper understanding of real-time concentration changes during evaporation is still needed. To address this gap, we employ a combined Raman and shadowgraphy approach to study the preferential evaporation of acoustically levitated ethanol/isooctane mixed fuel droplets. We monitor real-time concentration changes within the droplet using Raman spectroscopy, while shadowgraphy provides insights into the surface regression rate during preferential evaporation, and further, compare the results to simulated data generated by a model based on an Euler-Lagrange framework with OpenFOAM. While timescales deviated between the model and the measurement, likely due to an incomplete description of experimental boundary conditions, we found good qualitative agreement for the trends of droplet composition and surface regression rate between the measurement and the simulated data. We provide experimental data for the measured surface regression rate of ethanol/isooctane blended droplets during acoustic levitation.

Authors with CRIS profile

Benjamin Klevansky Lehrstuhl für Technische Thermodynamik (LTT) Florian Bauer Lehrstuhl für Technische Thermodynamik (LTT) Stefan Will Lehrstuhl für Technische Thermodynamik (LTT)

Involved external institutions

Technische Universität Darmstadt DE Germany (DE)

How to cite

APA:

Klevansky, B., Huschka, V., Petschow, A.C., Bauer, F., Hasse, C., & Will, S. (2026). Investigation of the preferential evaporation of fuel mixtures in levitated single droplets. Fuel, 421. https://doi.org/10.1016/j.fuel.2026.139040

MLA:

Klevansky, Benjamin, et al. "Investigation of the preferential evaporation of fuel mixtures in levitated single droplets." Fuel 421 (2026).

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