Investigations of magnetic fluid flow in ferromagnetic RAFM steel rectangular duct under inclined transversal magnetic field

doi:10.16568/j.0254-6086.202501016

Abstract

Abstract:

In order to study the magnetic fluid characteristics of the liquid metal blanket in a strong magnetic field, based on the multi-physics simulation software COMSOL, a two-dimensional MHD calculation program was developed. Using this program, the numerical simulation of the flow of liquid metal in a rectangular duct under the influence of a transverse magnetic field was simulated. Through the fully developed flow model, the effect of RAFM steel on the state of flow used as duct material was studied. Furthermore, the influence of the direction and strength of the transverse magnetic field upon the average velocity was also studied. The results show that the velocity distribution characteristics is insignificantly affected when RAFM steel is used as the duct wall material. A smaller Hartmann number accompanied with a larger magnetic field tilt angle has a greater influence on average velocity. The effect of distribution of magnetic field on fluid pressure drop can be ignored when the magnetic field direction is almost perpendicular to the pipe wall under a big Hartmann number. The conclusions provide theoretical supports for the design of liquid metal blanket.

Key words: Magneto hydrodynamics, RAFM, Liquid metal, Inclined magnetic field

摘要：

为了研究液态金属包层在强磁场中的磁流体特性，基于多物理场仿真软件COMSOL开发了二维MHD计算程序，并利用该程序对横向磁场作用下矩形管道内液态金属流动进行了数值模拟。在充分发展流动模型基础上，研究了使用低活化铁素体马氏体钢作为管道材料对流动状态的影响，以及横向磁场方向和强度对平均速度的影响。结果表明，使用低活化钢作为管壁材料对速度分布特征的影响较小；低哈特曼数和大磁场倾斜角度下对平均速度的影响更明显；在高哈特曼数且磁场方向与管壁几乎垂直的情形下，可以忽略磁场分布的改变对流体压降的影响。研究结果可为液态金属包层的设计提供理论帮助。

关键词: 磁流体动力学, 低活化铁素体马氏体钢, 液态金属, 斜磁场

CLC Number:

TL62+7

DONG Kai-wei, WANG Jun, WANG Xiao-yu, WU Xing-hua, GUO Li-kai. Investigations of magnetic fluid flow in ferromagnetic RAFM steel rectangular duct under inclined transversal magnetic field[J]. Nuclear Fusion and Plasma Physics, 2025, 45(1): 98-103.

董铠玮, 王俊, 王晓宇, 武兴华, 郭礼凯. 横向倾斜磁场作用下铁磁低活化钢矩形管道内磁流体流动的分析 [J]. 核工业西南物理研究院, 2025, 45(1): 98-103.

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