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三维射流中颗粒碰撞的直接数值模拟
  • 期刊名称：工程热物理学报
  • 时间：0
  • 页码：1151-1154
  • 语言：中文
  • 分类：O359[理学—流体力学;理学—力学]
  • 作者机构：[1]浙江大学能源清洁利用国家重点实验室, [2]浙江大学能源清洁利用国家重点实验室 浙江 杭州, [3]浙江 杭州
  • 相关基金：国家自然科学基金(No．50736006，No．50776080)
  • 相关项目：颗粒/颗粒群流动和传热的全尺度直接数值模拟
作者： 樊建人|闫洁|罗坤|
关键词： 气固两相三维射流, 颗粒碰撞, 硬球模型, gas-solid two-phase three-dimensional jet, inter-particle collision, hard-sphere model
中文摘要：

采用硬球模型对三维气固两相射流中Stokes数为10的中等颗粒的碰撞行为进行了直接数值模拟,以初步考察两相流动中颗粒碰撞的特性。颗粒的跟踪采用单向耦合的Lagrangian方法,计算分析了颗粒碰撞随空间、时间的演化及其对颗粒分布不均匀性的影响。模拟结果表明颗粒碰撞主要分布在流场中颗粒局部浓度较高的区域;由于射流初期大尺度涡结构的影响,颗粒的浓度分布最为不均,因此碰撞次数在这一时期随时间呈线性增加,达到最大值后逐渐回落趋于平缓。此外,对网格中颗粒个数分布的矩的统计发现,碰撞对颗粒分布不均匀性的影响随时间呈现不同的特性。

英文摘要：

The hard-sphere collision model was applied to directly simulate the collision behaviors of gas-solid particulate flow with stokes number 10 in a three-dimensional two-phase turbulent jet. The particles were traced by a one-way coupling approach under the Lagrangian frame.The spatial distribution and time history of the inter-particle collision and its effects on non-uniformity of particle distribution were investigated.It is observed that the inter-particle collision is mainly distributed in the local regi...

同期刊论文项目
颗粒/颗粒群流动和传热的全尺度直接数值模拟
期刊论文 10
气固两相湍流与燃烧相互作用的直接数值模拟和实验研究
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