Thesis-1968-Bo.pdf (5.34 MB)
Fundamentals of flow through packed beds
thesis
posted on 2018-06-28, 10:32 authored by M.K. BoSince the time of D'Arcy, the study of the flow of fluids through
packed beds of particles has used a convenient analogy from electrical
theory. Resistivity, or its inverse, permeability is ascribed to the
bed and, at low Reynolds numbers at least, this property is sufficient
to describe the behaviour of flow.
However, the permeability of a bed is not the fundamental property
that electrical resistivity is and it is necessary to relate it to a
more fundamental property of the system if it is ever to be possible
to exercise predictable control over it.
In this thesis, the relationship between the permeability of a
bed and the particle size distribution of its constituent particles is
considered. A literature review is presented which surveys all the
attempts which have partially succeeded in producing such a relationship.
A new theoretical model, based on the mean pore diameter and tortuosity
is derived which relates the permeability of a bed directly to its
particle size distribution. Experimental measurements of permeability
are presented and compare well with the model in some cases. In other
cases, the bed is found to be unstable and the permeability of the
bed is itself influenced by the flow of fluid. The reasons for the
instability of the bed are discussed.
Funding
Loughborough University of Technology.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Publisher
© M.K. BoPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
1968Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en