Experimental determination of the diffusion coefficient in two-dimensions in ferrous sulphate gels using the finite element method

C. Baldock, P. J. Harris, A. R. Piercy, B. Healy

Research output: Contribution to journalArticlepeer-review

101 Citations (Scopus)

Abstract

A novel two-dimensional finite element method for modelling the diffusion which occurs in Fricke or ferrous sulphate type radiation dosimetry gels is presented. In most of the previous work, the diffusion coefficient has been estimated using simple one-dimensional models. This work presents a two-dimensional model which enables the diffusion coefficient to be determined in a much wider range of experimental situations. The model includes the provision for the determination of a drift parameter. To demonstrate the technique comparative diffusion measurements between ferrous sulphate radiation dosimetry gels, with and without xylenol orange chelating agent and carbohydrate additives have been undertaken. Diffusion coefficients of 9.7±0.4, 13.3±0.6 and 9.5±0.8 10-3 cm2h-1 were determined for ferrous sulphate radiation dosimetry gels with and without xylenol orange and with xylenol orange and sucrose additives respectively.
Original languageEnglish
Pages (from-to)19-30
Number of pages12
JournalAustralasian Physical and Engineering Sciences in Medicine
Volume24
Issue number1
DOIs
Publication statusPublished - 2001
Externally publishedYes

Fingerprint Dive into the research topics of 'Experimental determination of the diffusion coefficient in two-dimensions in ferrous sulphate gels using the finite element method'. Together they form a unique fingerprint.

Cite this