The present work contributes to the development of the shadowgraph method for its routine application for an accurate determination of the Fick diffusion coefficient D11 of binary fluid mixtures. In this context, measurement and data evaluation strategies for thermodiffusion experiments where confinement and advection are potentially present are elaborated by studying two binary liquid mixtures with positive and negative Soret coefficients, i.e., 1,2,3,4-tetrahydronaphthalene/n-dodecane and acetone/cyclohexane. For obtaining accurate D11 data, the dynamics of non-equilibrium fluctuations in concentration is analyzed considering recent theory by data evaluation procedures that are demonstrated to be suitable for different experimental configurations.
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7 March 2023
Research Article|
March 03 2023
Fick diffusion coefficients probed by the shadowgraph method considering confinement and advection Available to Purchase
P. S. Schmidt
;
P. S. Schmidt
(Investigation, Writing – original draft, Writing – review & editing)
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
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W. Wu
;
W. Wu
(Investigation, Writing – review & editing)
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
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M. H. Rausch
;
M. H. Rausch
(Writing – review & editing)
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
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A. P. Fröba
A. P. Fröba
a)
(Conceptualization, Supervision, Writing – review & editing)
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
a)Author to whom correspondence should be addressed: [email protected]. Telephone: +49-9131-85-29789. Fax: +49-9131-85-25878
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P. S. Schmidt
Investigation, Writing – original draft, Writing – review & editing
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
W. Wu
Investigation, Writing – review & editing
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
M. H. Rausch
Writing – review & editing
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
A. P. Fröba
Conceptualization, Supervision, Writing – review & editing
a)
Institute of Advanced Optical Technologies – Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
, Paul-Gordan-Straße 8, 91052 Erlangen, Germany
a)Author to whom correspondence should be addressed: [email protected]. Telephone: +49-9131-85-29789. Fax: +49-9131-85-25878
J. Chem. Phys. 158, 094502 (2023)
Article history
Received:
January 23 2023
Accepted:
February 13 2023
Citation
P. S. Schmidt, W. Wu, M. H. Rausch, A. P. Fröba; Fick diffusion coefficients probed by the shadowgraph method considering confinement and advection. J. Chem. Phys. 7 March 2023; 158 (9): 094502. https://doi.org/10.1063/5.0143400
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