An Interferometric Technique for Measuring Binary Diffusion Coefficients

[+] Author and Article Information
A. K. Grob

University of Wisconsin, Madison, Wisc.

M. M. El-Wakil

Mechanical and Nuclear Engineering, University of Wisconsin, Madison, Wisc.

J. Heat Transfer 91(2), 259-265 (May 01, 1969) (7 pages) doi:10.1115/1.3580138 History: Received December 13, 1967; Revised April 22, 1968; Online August 25, 2011


An accurate interferometric technique for the measurement of Fick binary diffusion coefficients is described. The technique employs a Mach-Zehnder interferometer together with a high-speed stroboscope and flash-tube light source and a drum camera as a recording system. Successive concentration profiles are recorded in a modified, transient, one-dimensional Arnold diffusion model. A relative-time, relative-position method is used to analyze the interferograms, thus eliminating the uncertainties regarding the absolute diffusion time and exact position above the liquid surface in the diffusion cell as well as the overall mass transfer rate. This technique yields experimental values of the diffusion coefficient with an estimated accuracy of 1/2 percent and reproducibility of approximately ±1 percent. The binary diffusion coefficients for ten materials, four polar and six nonpolar, diffusing in air are presented. Of these, five have been studied by other investigators. The other five have not been previously reported in the literature.

Copyright © 1969 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In