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

Journal article
(Original article)


Publication Details

Author(s): Wolff L, Zangi P, Brands T, Rausch MH, Koß HJ, Fröba AP, Bardow A
Journal: International Journal of Thermophysics
Publisher: SPRINGER/PLENUM PUBLISHERS
Publication year: 2018
Volume: 39
Journal issue: 12
ISSN: 0195-928X
Language: English


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 Authors / FAU Editors

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


Additional Organisation
Erlangen Graduate School in Advanced Optical Technologies


External institutions
Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen


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).

BibTeX: 

Last updated on 2019-06-01 at 04:23