Advection-dispersion in symmetric field-flow fractionation channels

Working paper


Suslov, Sergey A. and Roberts, A. J.. 1998. Advection-dispersion in symmetric field-flow fractionation channels. Toowoomba, Australia. University of Southern Queensland.
Title

Advection-dispersion in symmetric field-flow fractionation channels

Report TypeWorking paper
AuthorsSuslov, Sergey A. (Author) and Roberts, A. J. (Author)
Institution of OriginUniversity of Southern Queensland
Number of Pages23
Year1998
PublisherUniversity of Southern Queensland
Place of PublicationToowoomba, Australia
Abstract

We model the evolution of the concentration field of macromolecules in a symmetric field-flow fractionation (FFF) channel by a one-dimensional advection-diffusion equation. The coefficients are precisely determined from the fluid dynamics. This model gives quantitative predictions of the time of elution of the molecules and the width in time of the concentration pulse. The model is rigorously supported by centre manifold theory. Errors of the derived model are quantified for improved predictions if necessary. The advection-diffusion equation is used to find that the optimal condition in a symmetric FFF for the separation of two species of molecules with similar diffusivities involves a high rate of crossflow.

Keywordsfield-flow; FFF; field-flow fractionation
ANZSRC Field of Research 2020401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
490399. Numerical and computational mathematics not elsewhere classified
490109. Theoretical and applied mechanics
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Byline AffiliationsDepartment of Mathematics and Computing
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