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

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Wolff L, Zangi P, Brands T, Rausch MH, Koß HJ, Fröba AP, Bardow A
Zeitschrift: International Journal of Thermophysics
Verlag: SPRINGER/PLENUM PUBLISHERS
Jahr der Veröffentlichung: 2018
Band: 39
Heftnummer: 12
ISSN: 0195-928X
Sprache: Englisch


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.


FAU-Autoren / FAU-Herausgeber

Fröba, Andreas Paul Prof. Dr.-Ing.
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Rausch, Michael Heinrich Dr.-Ing.
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Zangi, Pouria
Erlangen Graduate School in Advanced Optical Technologies


Zusätzliche Organisationseinheit(en)
Erlangen Graduate School in Advanced Optical Technologies


Autor(en) der externen Einrichtung(en)
Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen


Zitierweisen

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).

BibTeX: 

Zuletzt aktualisiert 2019-06-01 um 04:23