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Applied Optics

Applied Optics


  • Vol. 41, Iss. 7 — Mar. 1, 2002
  • pp: 1337–1342

Development of an interferometer for measurement of the diffusion coefficient of miscible liquids

Nasser Rashidnia and R. Balasubramaniam  »View Author Affiliations

Applied Optics, Vol. 41, Issue 7, pp. 1337-1342 (2002)

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A common-path interferometer (CPI) system was developed to measure the diffusivity of transparent liquid pairs by real-time visualization of the concentration gradient profile. The CPI is an optical technique that can be used to measure changes in the gradient of the refractive index of transparent materials. The CPI is a shearing interferometer that shares the same optical path from a laser light source to the final imaging plane. Molecular diffusivity of liquids can be determined by use of physical relations between changes in the optical path length and the liquid phase properties. The data obtained by this interferometer are compared with similar results from other techniques. This demonstrates that the instrument is reliable for measurement of the diffusivity of miscible liquids and allows the system to be compact and robust. It can also be useful for studies in interface dynamics as well as other applications in a low-gravity environment.

© 2002 Optical Society of America

OCIS Codes
(000.2190) General : Experimental physics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(230.5480) Optical devices : Prisms

Original Manuscript: March 27, 2001
Revised Manuscript: August 22, 2001
Published: March 1, 2002

Nasser Rashidnia and R. Balasubramaniam, "Development of an interferometer for measurement of the diffusion coefficient of miscible liquids," Appl. Opt. 41, 1337-1342 (2002)

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  1. W. Linnik, “Simple interferometer for the investigation of optical systems,” C. R. Acad. Sci. U.R.S.S. 1, 208–210 (1933), abstract in Z. Instrumentenkd. 54, 463 (1934).
  2. R. N. Smartt, J. Strong, “Point-diffraction interferometer,” J. Opt. Soc. Am. 62, 737 (1972).
  3. C. R. Mercer, N. Rashidnia, K. Creath, “High data density temperature measurement for quasi steady-state flows,” Exp. Fluids 21, 11–16 (1996). [CrossRef]
  4. C. R. Mercer, N. Rashidnia, “Common-path phase-stepped interferometer for fluid measurements,” in Proceedings of the Eight International Symposium of Flow Visualization, G. M. Carlomango, I. Grant, eds. (1998; available on CD-ROM from Optical Diagnostics in Engineering, http://www.ode-web.demon.co.uk ), pp. 256.1–256.9.
  5. P. Petitjeans, T. Maxworthy, “Miscible displacements in a capillary tube. Part 1: Experiments,” J. Fluid Mech. 326, 37–56 (1996). [CrossRef]
  6. A. Sommerfeld, Optics, Lectures in Physics IV (Academic, New York, 1964), p. 347).
  7. W. Merzkirch, Flow Visualization (Academic, New York, 1987), pp. 180–188).
  8. N. Rashidnia, R. Balasubramaniam, J. Kuang, P. Petitjeans, T. Maxworthy, “Measurement of the diffusion coefficient of miscible fluids using both interferometry and Weiners method,” Int. J. Thermophys. 22, 547–555 (2001). [CrossRef]
  9. W. Merzkirch, “Generalized analysis of shearing interferometers as applied for gas dynamic studies,” Appl. Opt. 13, 409–413 (1974). [CrossRef] [PubMed]
  10. R. B. Bird, W. E. Stewart, E. N. Lightfoot, Transport Phenomena (Wiley, New York, 1960), p. 558).
  11. N. Rashidnia, R. Balasubramaniam, “Optical measurement of concentration gradient near miscible interfaces,” presented at the ASME Proceedings of the Microgravity Transport Processes in Fluid, Thermal, Biological Materials Sciences II, Banff, Alberta, Canada, 30 Sept.–5 Oct. 2001, paper UEF: MTP-01-22.

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