Evaporation of water/ethanol droplets in an air flow: experimental study and modelling

Elena Starinskaya; Nikolay Miskiv; Alexander Nazarov; Vladimir Terekhov; Victor Terekhov; Oyuna Rybdylova; Sergei Sazhin

doi:10.1016/j.ijheatmasstransfer.2021.121502

Evaporation of water/ethanol droplets in an air flow: experimental study and modelling

Elena Starinskaya, Nikolay Miskiv, Alexander Nazarov, Vladimir Terekhov, Victor Terekhov, Oyuna Rybdylova, Sergei Sazhin

Research output: Contribution to journal › Article › peer-review

Abstract

The paper focuses on experimental investigation and modelling of the evaporation of supported ethanol/water droplets in an air flow. The modelling is based on the effective thermal conductivity/effective diffusivity model, using the analytical solutions to the transient heat transfer and species diffusion equations in droplets at each time step. The contribution of the supporting thread is included in the model. Model predictions are shown to be compatible with experimental data. For all mass fractions of ethanol, droplet surface temperatures rapidly decrease initially. This is followed by an increase in this temperature for non-zero mass fractions of ethanol in the mixture. For pure water this temperature remains almost constant after an initial decrease. In all cases, droplet diameters to power 1.5 decrease almost linearly with time. This agrees with model predictions in the limit for large droplet Reynolds numbers.

Original language	English
Article number	121502
Pages (from-to)	1-7
Number of pages	7
Journal	International Journal of Heat and Mass Transfer
Volume	177
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2021.121502
Publication status	Published - 13 Jun 2021

Bibliographical note

Funding Information: Work on this paper was supported by the Russian Foundation for Basic Research (RFBR) (Grant no. 20-58-10003KO_a ) (contributions by E.M. Starinskaya, N.B. Miskiv, A.D. Nazarov, V.V. Terekhov, and V.I. Terekhov), the Royal Society (UK) (Grant no. IEC 192007) (contributions by O. Rybdylova and S.S. Sazhin), and the EPSRC (Grant no. MR/T043326/1 ) (contribution by O. Rybdylova).

Keywords

Droplets
Effect of support
Ethanol-water solution
Evaporation
Forced convection

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10.1016/j.ijheatmasstransfer.2021.121502

Starinskaya-Paper-13Apr21-CleanAccepted author manuscript, 611 KBLicence: CC BY-NC-ND

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title = "Evaporation of water/ethanol droplets in an air flow: experimental study and modelling",

abstract = "The paper focuses on experimental investigation and modelling of the evaporation of supported ethanol/water droplets in an air flow. The modelling is based on the effective thermal conductivity/effective diffusivity model, using the analytical solutions to the transient heat transfer and species diffusion equations in droplets at each time step. The contribution of the supporting thread is included in the model. Model predictions are shown to be compatible with experimental data. For all mass fractions of ethanol, droplet surface temperatures rapidly decrease initially. This is followed by an increase in this temperature for non-zero mass fractions of ethanol in the mixture. For pure water this temperature remains almost constant after an initial decrease. In all cases, droplet diameters to power 1.5 decrease almost linearly with time. This agrees with model predictions in the limit for large droplet Reynolds numbers.",

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author = "Elena Starinskaya and Nikolay Miskiv and Alexander Nazarov and Vladimir Terekhov and Victor Terekhov and Oyuna Rybdylova and Sergei Sazhin",

note = "Funding Information: Work on this paper was supported by the Russian Foundation for Basic Research (RFBR) (Grant no. 20-58-10003KO_a ) (contributions by E.M. Starinskaya, N.B. Miskiv, A.D. Nazarov, V.V. Terekhov, and V.I. Terekhov), the Royal Society (UK) (Grant no. IEC 192007) (contributions by O. Rybdylova and S.S. Sazhin), and the EPSRC (Grant no. MR/T043326/1 ) (contribution by O. Rybdylova).",

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AU - Starinskaya, Elena

AU - Miskiv, Nikolay

AU - Nazarov, Alexander

AU - Terekhov, Vladimir

AU - Terekhov, Victor

AU - Rybdylova, Oyuna

AU - Sazhin, Sergei

N1 - Funding Information: Work on this paper was supported by the Russian Foundation for Basic Research (RFBR) (Grant no. 20-58-10003KO_a ) (contributions by E.M. Starinskaya, N.B. Miskiv, A.D. Nazarov, V.V. Terekhov, and V.I. Terekhov), the Royal Society (UK) (Grant no. IEC 192007) (contributions by O. Rybdylova and S.S. Sazhin), and the EPSRC (Grant no. MR/T043326/1 ) (contribution by O. Rybdylova).

PY - 2021/6/13

Y1 - 2021/6/13

N2 - The paper focuses on experimental investigation and modelling of the evaporation of supported ethanol/water droplets in an air flow. The modelling is based on the effective thermal conductivity/effective diffusivity model, using the analytical solutions to the transient heat transfer and species diffusion equations in droplets at each time step. The contribution of the supporting thread is included in the model. Model predictions are shown to be compatible with experimental data. For all mass fractions of ethanol, droplet surface temperatures rapidly decrease initially. This is followed by an increase in this temperature for non-zero mass fractions of ethanol in the mixture. For pure water this temperature remains almost constant after an initial decrease. In all cases, droplet diameters to power 1.5 decrease almost linearly with time. This agrees with model predictions in the limit for large droplet Reynolds numbers.

AB - The paper focuses on experimental investigation and modelling of the evaporation of supported ethanol/water droplets in an air flow. The modelling is based on the effective thermal conductivity/effective diffusivity model, using the analytical solutions to the transient heat transfer and species diffusion equations in droplets at each time step. The contribution of the supporting thread is included in the model. Model predictions are shown to be compatible with experimental data. For all mass fractions of ethanol, droplet surface temperatures rapidly decrease initially. This is followed by an increase in this temperature for non-zero mass fractions of ethanol in the mixture. For pure water this temperature remains almost constant after an initial decrease. In all cases, droplet diameters to power 1.5 decrease almost linearly with time. This agrees with model predictions in the limit for large droplet Reynolds numbers.

KW - Droplets

KW - Effect of support

KW - Ethanol-water solution

KW - Evaporation

KW - Forced convection

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M3 - Article

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JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

M1 - 121502

ER -

Evaporation of water/ethanol droplets in an air flow: experimental study and modelling

Abstract

Bibliographical note

Keywords

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