Intermittent gravity-driven flow of grains through narrow pipes
详细信息 查看全文
- 作者：Carlos A. Alvarez calvarez@fem.unicamp.br" class="auth_mail" title="E-mail the corresponding author ; Erick de Moraes Franklin ; franklin@fem.unicamp.br" class="auth_mail" title="E-mail the corresponding author
- 关键词：Fine grains ; Gravitational flow ; Narrow pipes ; Instability ; Density waves
- 刊名：Physica A: Statistical Mechanics and its Applications
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：465
- 期：Complete
- 页码：725-741
- 全文大小：2507 K
文摘
- •
Density waves of granular flows in vertical tubes are investigated experimentally.
- •
The celerity and length scale of waves were measured by digital image processing.
- •
In some experiments the waves propagated contrary to granular flow direction.
- •
A one-dimensional model consisting of dimensionless equations is proposed.
- •
A linear stability analysis was used to find the typical length of density waves.