INTERFEROMETRIC MEASUREMENT OF A DIFFUSION COEFFICIENT |
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| Rodrigo Riquelme, Ignacio Lira, Carlos Pérez-López, Juan A. Rayas, Ramón Rodríguez-Vera |
- Abstract:
- In this paper we present two methods to measure the diffusion coefficient in transparent media using electronic speckle pattern interferometry (ESPI). Although these methods are not new, it appears that they have not been compared, and that the proposed scheme of data treatment by least-squares adjustment for one of these methods has not been applied before. The methods were tested on a cell containing a 1.75 M NaCl solution diffusing into distilled water. Results using either method were very similar and they compare well with the value of the diffusion coefficient reported in the literature for the two substances.
- Keywords:
- diffusion coefficients, interferometry, least-squares adjustment
- Download:
- PWC-2006-TC15-001u.pdf
- DOI:
- -
- Event details
- Event name:
- XVIII IMEKO World Congress
- Title:
Metrology for a Sustainable Development
- Place:
- Rio de Janeiro, BRAZIL
- Time:
- 17 September 2006 - 22 September 2006