Numerical analysis of turbulent pipe flow in a transverse magnetic field
Numerical analysis of turbulent pipe flow in a transverse magnetic field
复制标题
DOI：
10.1016/s0017-9310(96)00249-9
复制
发表时间：
1997-05
影响因子：
5.2
通讯作者：
Hyun-Chul Ji;R.A Gardner
中科院分区：
文献类型：
--
作者：
Hyun-Chul Ji;R.A Gardner
采用修正的标准k-e湍流模型，考虑了外加磁场与湍流脉动的直接相互作用，探讨了恒定横向磁场对湍流的阻尼作用。数值求解了耦合的质量、动量、能量和磁感应强度方程，为研究在壁面均匀热流和外加恒定横向磁场的情况下，导电流体通过电绝缘管道流动时电磁抑制湍流的效果提供了一种有效的方法。数值结果定量地说明了磁场对湍流的抑制作用，并正确地预测了惯性力和磁场力之间的相互对抗。计算出的速度分布，表面摩擦，温度分布和努塞尔数覆盖范围的雷诺数从16000到1000000和哈特曼数从0到375，并与现有的实验数据显示协议。给出了平均努塞尔数与Peclet数和Hartmann数的经验关系式。
The damping of turbulence by a constant transverse magnetic field was explored using the standard k-e turbulence model modified to account for the direct interaction of the applied field with turbulent fluctuations. The coupled mass, momentum, energy and magnetic induction equations were solved numerically providing an efficient technique for investigating the effects of electromagnetic suppression of turbulence in the flow of an electrically conducting fluid through an electrically insulated pipe with a uniform heat flux at the wall and an applied constant transverse magnetic field. The numerical results quatitatively demonstrated the effects of turbulence suppression by the magnetic field and correctly predicted the mutual antagonism between inertial and magnetic forces. The computed velocity profiles, skin friction, temperature profiles and the Nusselt numbers covered a range of Reynolds numbers from 16000 to 1 000000 and Hartmann numbers from 0 to 375, and showed agreement with available experimental data. An empirical equation for the average Nusselt number as a function of the Peclet number and the Hartmann number is presented.