化工学报 ›› 2009, Vol. 60 ›› Issue (1): 6-14.

• 传递现象 • 上一篇    下一篇

波壁管内的脉动流动及传质强化的数值模拟

贾宝菊,孙发明,卞永宁,徐新生   

  1. 大连理工大学工业装备结构分析国家重点实验室
  • 出版日期:2009-01-05 发布日期:2009-01-05

Numerical simulation of pulsatile flow and mass transfer enhancement in a wavy-walled tube

JIA Baoju,SUN Faming,BIAN Yongning,XU Xinsheng   

  • Online:2009-01-05 Published:2009-01-05

摘要:

应用Fluent软件对波壁管内脉动流场下的层流流动、质量传递强化进行了数值研究,并将得到的结果与已有的实验结果进行了比较。考虑了3个参数:净流动Reynolds数Re,脉动流的振动分率P和代表脉动频率的Strouhal数St,其中重点考察了St对质量传递强化的影响。对中等Reynolds数以下的脉动流动结构和质量传递强化的数值模拟结果表明,存在一个最佳St使得强化效果最好,并且数值结论与相应的实验结果具有较好的一致性。

关键词: 脉动流场, 质量传递强化, 波壁管, 数值模拟

Abstract:

Fluid flow and mass transfer enhancement were investigated numerically with the software Fluent in a sinusoidal wavy-walled tube for pulsatile laminar flow,and the comparison between numerical and experimental results was performed.Three parameters were considered here:net flow Reynolds number,oscillatory fraction of flow rate and Strouhal number.Among them,the effect of Strouhal number was especially investigated.The numerical results of flow patterns and mass transfer enhancement below the moderate Reynolds numbers showed that there existed an optimum Strouhal number corresponding to the maximum mass transfer enhancement effect,and a good agreement was found between numerical and experimental results.

Key words: 脉动流场, 质量传递强化, 波壁管, 数值模拟