首页> 外文期刊>Zeitschrift fur Physik, B. Condensed Matter >Surface flows of granular mixtures: II. Segregation with grains of different size
【24h】

Surface flows of granular mixtures: II. Segregation with grains of different size

机译:颗粒混合物的表面流动:II。与不同尺寸的晶粒分离

获取原文
获取原文并翻译 | 示例
           

摘要

We present the generalization of a theoretical model for segregation of granular mixtures due to surface flows, published in J. Phys. I France 6, 1295 (1996). Our generalized model is valid for grains differing by their size and/or their surface properties; in the present paper, we describe the case of two species with the same surface properties but two different sizes. The rolling stream is assumed to be homogeneous. Exchanges between the grains at rest and the rolling stream are modelized via binary collisions. The model predicts that during the filling of a two-dimensional silo, continuous segregation appears inside the static phase: small (respectively large) grains tend to stop uphill (respectively downhill), although both species remain present everywhere. This fits the observations when the size difference between the species is small. When the size difference is large, a different regime is observed. We argue that in this case, segregation occurs directly inside the rolling stream.
机译:我们提出了一种理论模型的概括,该模型用于由于表面流动而导致的颗粒混合物的分离,该模型发表在J. Phys。 I France 6,1295(1996)。我们的通用模型适用于尺寸和/或表面性质不同的晶粒;在本文中,我们描述了具有相同表面特性但具有两个不同大小的两个物种的情况。假定滚动流是均匀的。静态晶粒和轧制流之间的交换通过二元碰撞进行建模。该模型预测,在填充二维筒仓期间,静态相内会出现连续偏析:小(相应大)晶粒往往会停止上坡(分别为下坡),尽管这两个物种仍然存在于各处。当物种之间的大小差异较小时,这符合观察结果。当大小差异较大时,会观察到不同的方案。我们认为,在这种情况下,隔离直接发生在滚动流内部。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号