Simultaneous determination of multiple transport properties over a wide range of temperatures and pressures from the analysis of non-equilibrium fluctuations by the shadowgraph method

Wu W, Jander JH, Rausch MH, Fröba AP, Giraudet C (2020)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2020

Journal

Journal of Chemical Physics AIP Publishing

Publisher: AMER INST PHYSICS

Book Volume: 153

Article Number: ARTN 144201

Journal Issue: 14

DOI: 10.1063/5.0024503

Abstract

The present work demonstrates that by the analysis of the dynamics of non-equilibrium fluctuations using the shadowgraph method, the thermal diffusivity, the Fick diffusion coefficient, the kinematic viscosity, and the Soret coefficient of a binary mixture can be determined from a single thermodiffusion experiment. The study was performed for a mixture consisting of equal masses of 1,2,3,4-tetrahydronaphthalene and n-dodecane in a newly developed shadowgraph apparatus at temperatures up to 373 K and pressures up to 40 MPa. The obtained results are mainly discussed in the light of their uncertainties at varying thermodynamic states for evaluating the benefits, drawbacks, and potentials of the apparatus. The Fick diffusion coefficient and the thermal diffusivity obtained with average expanded uncertainties of 2.8% and 6.6% agree with literature data and measurements for the same mixture taken by heterodyne dynamic light scattering. Current limitations of the method are reflected by the distinctly larger uncertainties of the kinematic viscosity and the Soret coefficient. Corresponding reasons and potential measures to overcome the limitations are discussed.

Authors with CRIS profile

Wenchang Wu Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Julius Jander Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Andreas Paul Fröba Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Cédric Giraudet Erlangen Graduate School in Advanced Optical Technologies (SAOT)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies (SAOT)

Related research project(s)

Development of a high-speed shadowgraph for the accurate and simultaneous determination of multiple transport properties under high pressures and high temperatures Jan. 1, 2018 - Dec. 31, 2020

How to cite

APA:

Wu, W., Jander, J.H., Rausch, M.H., Fröba, A.P., & Giraudet, C. (2020). Simultaneous determination of multiple transport properties over a wide range of temperatures and pressures from the analysis of non-equilibrium fluctuations by the shadowgraph method. Journal of Chemical Physics, 153(14). https://doi.org/10.1063/5.0024503

MLA:

Wu, Wenchang, et al. "Simultaneous determination of multiple transport properties over a wide range of temperatures and pressures from the analysis of non-equilibrium fluctuations by the shadowgraph method." Journal of Chemical Physics 153.14 (2020).

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