caa a22 4500 465813860 CHVBK 20180323112122.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF01329294 doi (NATIONALLICENCE)springer-10.1007/BF01329294 Edwards S. Cavendish Laboratory, Madingley Road, CB3 OHE, Cambridge, UK aut The rheology of powders [Elektronische Daten] [S. Edwards] This paper studies the slow flow of powders. It is argued that since powders can flow like liquids, there must be equations similar to those of liquids. The phenomenon of a variable density, dilatancy, is described by an analogue of temperature called the compactivity X. Whereas, in thermal physicsT = ∂E/∂S, powders are controlled byX = ∂V/∂S. The equations forϱ, v, T of a liquid are replaced byϱ, v, X. An analogy for free energy is described, and the solution to some simple problems of packing and mixing are offered. As an example of rheology, it is shown that the simplest flow equations produce a transition to plug flow in appropriate circumstances. Steinkopff, 1990 P owder rheology nationallicence d ilatancy nationallicence Rheologica Acta Steinkopff-Verlag 29/6(1990-11-01), 493-499 0035-4511 29:6<493 1990 29 397 https://doi.org/10.1007/BF01329294 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01329294 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Edwards S. Cavendish Laboratory, Madingley Road, CB3 OHE, Cambridge, UK aut NATIONALLICENCE 773 0- Rheologica Acta Steinkopff-Verlag 29/6(1990-11-01), 493-499 0035-4511 29:6<493 1990 29 397 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer