...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Particle resolved direct numerical simulation of free settling particles for the study of effects of momentum response time on drag force
【24h】

Particle resolved direct numerical simulation of free settling particles for the study of effects of momentum response time on drag force

机译：颗粒解决了自由沉降颗粒的直接数值模拟，用于研究动量响应时间对拖曳力的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Dynamics of settling particles is studied by particle resolved direct numerical simulation in periodic domain. The main aim of this study is to explain the effects of momentum response time on the average drag force of settling process for different solid volume fractions. The response time is varied by changing the settling fluid, solid volume fraction and Reynolds number. Simulations showed that the particles with larger response times are negligibly affected by fluid. Thus, the average drag force acting on larger response times particles is nearly same as the average drag force on fixed particles. However, for particles with smaller response times, particles develop microstructures and velocity fluctuations during settling process. This behavior of low response time settling particles results in significant deviation of average drag force from the average drag force on fixed particles. At the end of paper, an improved and better drag correlation is proposed for performing mesoscopic simulations. (C) 2018 Elsevier B.V. All rights reserved.
机译：通过定期域中的颗粒分辨的直接数值模拟研究了沉降颗粒的动态。本研究的主要目的是解释动量响应时间对不同固体体积分数的沉降过程平均牵引力的影响。通过改变沉降液，固体体积分数和雷诺数来改变响应时间。模拟表明，具有较大响应时间的颗粒被流体可忽略地影响。因此，作用于较大响应时间颗粒的平均阻力几乎与固定颗粒上的平均拖曳力几乎相同。然而，对于具有较小响应时间的颗粒，颗粒在沉降过程中发育微观结构和速度波动。低响应时间沉降粒子的这种行为导致平均阻力从固定颗粒上的平均拖曳力的显着偏差。在纸的结束时，提出了一种改进和更好的拖曳相关性以进行介观模拟。 （c）2018 Elsevier B.v.保留所有权利。

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