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3D MHD free surface fluid flow simulation based on magnetic-field induction equations

Summary: 3D MHD free surface fluid flow simulation based on
magnetic-field induction equations
H.L. Huang 1, A. Ying, M.A. Abdou
UCLA, 43-133 Engineering IV, 420 Westwood Plaza, Los Angeles, CA 90095, USA
The purpose of this paper is to present our recent efforts on 3D MHD model development and our results based on
the technique derived from induced-magnetic-field equations. Two important features are utilized in our numerical
method to obtain convergent solutions. First, a penalty factor is introduced in order to force the local divergence free
condition of the magnetic fields. The second is that we extend the insulating wall thickness to ensure that the induced
magnetic field at its boundaries is null. These simulation results for lithium film free surface flows under NSTX
outboard mid-plane magnetic field configurations have shown that 3D MHD effects from a surface normal field
gradient cause return currents to interact with surface normal fields and produce unfavorable MHD forces. This leads
to a substantial change in flow pattern and a reduction in flow velocity, with most of the flow spilling over one side of
the chute. These critical phenomena can not be revealed by 2D models. Additionally, a design which overcomes these
undesired flow characteristics is obtained.
# 2002 Elsevier Science B.V. All rights reserved.
Keywords: Free surface; Fluid flow; Magnetic field
1. Introduction
To fully understand how liquid metal MHD
flows in a fusion device, 3-D numerical simulation


Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles


Collections: Plasma Physics and Fusion