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Fusion Engineering and Design 72 (2004) 334 Progress on the modeling of liquid metal, free surface,

Summary: Fusion Engineering and Design 72 (2004) 3­34
Progress on the modeling of liquid metal, free surface,
MHD flows for fusion liquid walls
N.B. Morleya,, S. Smolentseva, R. Munipallib, M.-J. Nia, D. Gaoa, M. Abdoua
a MAE Department, 43-133 E-IV, University of California, Los Angeles, CA 90095-1597, USA
b HyPerComp Inc., 31255 Cedar Valley Dr., Suite. 327, Westlake Village, CA 91362, USA
Available online 13 October 2004
The proposed use of a flowing liquid metal layers as virtual first-walls for magnetic fusion energy reactors has prompted
the development of numerical models capable of predicting the motion of such free surface liquid-metal flows within complex
geometry boundaries and in the presence of strong magnetic fields. Several model variants were developed that utilize the
assumption of toroidal axisymmetry to simplify the governing Navier­Stokes and Maxwell's equations to a 2D form. Typically
an induced magnetic field formulation has been used to model eddy current formation and various numerical methods and free
surface tracking techniques (including height function and volume-of-fluid) have been employed. These axisymmetric models
predict a variety of interesting behavior including the effect of toroidal field gradients on the velocity profiles and stability, and
the effect of surface-normal magnetic field components on toroidal motion and flow thickness. However, axisymmetric models
cannot be used to simulate the true 3D geometry and magnetic field configuration of a magnetic fusion reactor. And so, a 3D,
flexible geometry, multiple material, free surface magnetohydrodynamic (MHD) solver called HIMAG has been developed over
the past several years. The HIMAG formulation is described in detail along with the results of several initial benchmark problems.
Preliminary data from the application of HIMAG to several fusion relevant liquid wall problems including: (1) motion of lithium


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


Collections: Plasma Physics and Fusion