Concentration-Dependent Diffusion Coefficients of Binary Gas Mixtures Using a Loschmidt Cell with Holographic Interferometry: Part II: Single Experiment

Wolff L, Zangi P, Brands T, Rausch MH, Koß HJ, Fröba AP, Bardow A (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

International Journal of Thermophysics Springer Verlag (Germany)

Publisher: SPRINGER/PLENUM PUBLISHERS

Book Volume: 39

Article Number: 132

Journal Issue: 12

DOI: 10.1007/s10765-018-2451-7

Abstract

A model-based experimental approach is presented to measure concentration-dependent diffusion coefficients of binary gases from a single experimental run. The diffusion experiments are performed with a Loschmidt cell combined with holographic interferometry that has been improved in PartI of this paper (Wolff et al. in Int. J. Thermophys. 2018, 10.1007/s10765-018-2450-8). Measurements are taken with the system helium-krypton. Besides highly accurate measurements, a highly accurate diffusion model is required to retrieve the weak concentration dependence of the diffusion coefficient. We derive a consistent diffusion model considering real gas effects and the concentration dependence of the diffusion coefficient. The model describes the experimental fringe data with deviations of less than 0.2 interference fringe orders, which corresponds to a relative deviation of 0.17% indicating high quality of both the experimental data and the employed model. Therefore, the concentration dependence of the helium-krypton diffusion coefficient could be successfully retrieved from a single experiment of mixing pure gases. Thus, the presented approach allows for the efficient characterization of diffusion in gases.

Authors with CRIS profile

Pouria Zangi Erlangen Graduate School in Advanced Optical Technologies Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Andreas Paul Fröba Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies

Related research project(s)

Modellgestützte Auswertung von Diffusionsexperimenten an binären Gasgemischen in einer Loschmidt-Zelle July 1, 2016 - Nov. 30, 2017

Involved external institutions

Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen DE Germany (DE)

How to cite

APA:

Wolff, L., Zangi, P., Brands, T., Rausch, M.H., Koß, H.-J., Fröba, A.P., & Bardow, A. (2018). Concentration-Dependent Diffusion Coefficients of Binary Gas Mixtures Using a Loschmidt Cell with Holographic Interferometry: Part II: Single Experiment. International Journal of Thermophysics, 39(12). https://dx.doi.org/10.1007/s10765-018-2451-7

MLA:

Wolff, Ludger, et al. "Concentration-Dependent Diffusion Coefficients of Binary Gas Mixtures Using a Loschmidt Cell with Holographic Interferometry: Part II: Single Experiment." International Journal of Thermophysics 39.12 (2018).

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