...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Fluids and Structures >Large eddy simulation of flows after a bluff body: Coherent structures and mixing properties
【24h】

Large eddy simulation of flows after a bluff body: Coherent structures and mixing properties

机译：钝体流动的大涡模拟：相干结构和混合特性

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

This paper performs large eddy simulations (LES) to investigate coherent structures in the flows after the Sydney bluff-body burner, a circular bluff body with an orifice at its center. The simulations are validated by comparison to existing experimental data. The Q function method is used to visualize the instantaneous vortex structures. Three kinds of structures are found, a cylindrical shell structure in the outer shear layer, a ring structure and some hairpin-like structures in the inner shear layer. An eduction scheme is employed to investigate the coherent structures in this flow. Some large streaks constituted by counter-rotating vortices are found in the outer shear layer and some well-organized strong structures are found in the inner shear layer. Finally, the influences of coherent structures on scalar mixing are studied and it is shown that scalar in the recirculation region is transported outward by coherent structures.
机译：本文进行了大型涡流模拟（LES），以研究在悉尼钝角燃烧器之后的流动中的相干结构。通过与现有实验数据进行比较来验证仿真。 Q函数方法用于可视化瞬时涡旋结构。发现了三种结构，外剪切层为圆柱壳结构，内剪切层为环形结构和一些发夹状结构。采用一种导出方案来研究此流中的相干结构。在外剪切层中发现了一些由反向旋转涡流构成的大条纹，在内剪切层中发现了一些组织良好的强结构。最后，研究了相干结构对标量混合的影响，结果表明，再循环区中的标量被相干结构向外传输。

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