It is well known that changes in atmospheric humidity can
significantly affect the ease of recovery of stored powders. This
is demonstrated, explained and an investigation of a technique to
monitor the effects involved is carried out.
The demonstration is by construction of powder shear tests at
various humidities. The effects observed are explained in terms of the water vapour–surface interaction by use of common physical adsorption
models. To devise an efficient monitoring technique the
literature pertaining to moisture measurement is reviewed and an
electrical conduction method is preferred. A mathematical model for flow of electrical current through a powder bed is developed
and is shown to be reasonable.
Funding
Science Research Council (student grant and equipment grant).
History
School
Aeronautical, Automotive, Chemical and Materials Engineering
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
1971
Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.