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Titolo:
On granular surface flow equations
Autore:
Douady, S; Andreotti, B; Daerr, A;
Indirizzi:
Univ Paris 06, CNRS, ENS, LPS, F-75242 Paris 05, France Univ Paris 06 Paris France 05 , CNRS, ENS, LPS, F-75242 Paris 05, France Univ Paris 07, CNRS, ENS, LPS, F-75242 Paris, France Univ Paris 07 ParisFrance F-75242 CNRS, ENS, LPS, F-75242 Paris, France
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL B
fascicolo: 1, volume: 11, anno: 1999,
pagine: 131 - 142
SICI:
1434-6028(199909)11:1<131:OGSFE>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
SANDPILE; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Douady, S Univ Paris 06, CNRS, ENS, LPS, 25 Rue Lhomond, F-75242 Paris 05,France Univ Paris 06 25 Rue Lhomond Paris France 05 2 Paris 05, France
Citazione:
S. Douady et al., "On granular surface flow equations", EUR PHY J B, 11(1), 1999, pp. 131-142

Abstract

Conservation equations are written for surface flows (either fluid or granular). The particularity of granular surface flows is then pointed out, namely that the depth of the flowing layer is not a priori fixed, leading to open equations. It is shown how some hypothesis on the flowing layer allows to close the system of equations. A possible hypothesis, similar to that made for a fluid layer, but inspired from granular flow experiments, is presented. The force acting on the flowing layer is discussed. Averaging over the flowing depth, as in shallow water theory, then allows to transform theseconservation laws into equations for the evolution of the profile of a granular pile. Apart from their interest for building models, these conservation laws can be used to measure experimentally the effective forces acting on a flowing layer.

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Documento generato il 29/11/20 alle ore 16:28:16