Use this URL to cite or link to this record in EThOS: | https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.465728 |
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Title: | Determination of high temperature gaseous diffusion coefficients by the point-source method | ||||||
Author: | Mills, Alan |
ISNI:
0000 0001 3408 3666
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Awarding Body: | University of Surrey | ||||||
Current Institution: | University of Surrey | ||||||
Date of Award: | 1973 | ||||||
Availability of Full Text: |
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Abstract: | |||||||
The point-source method (due to Walker and Westenberg) has been used to measure binary gaseous diffusion coefficients in the nominal temperature range 300 - 900 K for the systems N[2]-CO[2] and N[2]-CH[4] with an accuracy of +/-3% The method consists essentially of measuring the steady-state concentration distribution downstream from a small source of 'trace' gas diffusing into a uniform laminar stream of a different 'carrier' gas. A detailed account is given of the construction and use of the apparatus, together with an analysis of possible sources of error. The N[2]-CO[2] results agree closely with literature values, both as diffusion coefficients and in respect of fitted intermolecular potentials; the reliability of the technique is thereby confirmed. The N[2]-CH[4] results are the most extensive available measurements, and are a few percent higher than literature values. In the course of the work sources of systematic error have been discovered in the two-wire anemometer of Walker and Westenberg.
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Supervisor: | Not available | Sponsor: | Not available | ||||
Qualification Name: | Thesis (Ph.D.) | Qualification Level: | Doctoral | ||||
EThOS ID: | uk.bl.ethos.465728 | DOI: | Not available | ||||
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