University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Determination of high temperature gaseous diffusion coefficients by the point-source method.

Mills, Alan. (1973) Determination of high temperature gaseous diffusion coefficients by the point-source method. Doctoral thesis, University of Surrey (United Kingdom)..

Available under License Creative Commons Attribution Non-commercial Share Alike.

Download (5MB) | Preview


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.

Item Type: Thesis (Doctoral)
Divisions : Theses
Authors :
Mills, Alan.
Date : 1973
Contributors :
Additional Information : Thesis (Ph.D.)--University of Surrey (United Kingdom), 1973.
Depositing User : EPrints Services
Date Deposited : 22 Jun 2018 14:24
Last Modified : 06 Nov 2018 16:53

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800