东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (8): 1154-1157.DOI: -

• 论著 • 上一篇    下一篇

平行磁场作用下的低雷诺数平板流研究

董帅;李本文;   

  1. 东北大学材料电磁过程研究教育部重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(51176026)

Investigation of plane channel flow at low Reynolds number under parallel magnetic field

Dong, Shuai (1); Li, Ben-Wen (1)   

  1. (1) Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Li, B.-W.
  • About author:-
  • Supported by:
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摘要： 用直接数值模拟方法,对平行磁场作用下的不可压缩导电流体在两无限大平行平板内的流动特性进行了研究.磁场的取向可以是侧向的(与主流方向垂直),也可以是流向的(与主流方向平行),主要讨论了后一种情况.流向磁场的主要作用是增强流向上的脉动速度,而抑制侧向和法向的脉动速度及动量传输.当施加的流向磁场强度足够大时,流场从湍流转变为层流,而通过施加背景噪声或脉冲噪声的方法不能使流场重新转变为湍流.

关键词: 平行磁场, 湍流, 直接数值模拟, 大尺度间歇性

Abstract: In the presence of a parallel magnetic field, the suppression of turbulent fluctuations in the plane channel filled with incompressible conducting fluids was investigated using direct numerical simulation method. The magnetic orientations concerned were the spanwise and streamwise directions, and the latter one was discussed mainly. The imposed streamwise magnetic field stimulates streamwise velocity fluctuations, while inhibits fluctuations in the other two directions. Relaminarization can be realized when the imposed streamwise magnetic field is sufficiently strong, but the transition from laminar to turbulence can not be observed by imposing three dimensional random background or impulse noises under the streamwise magnetic field.

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