Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical and Experimental Investigation of Electro-Vortex Flow in a
  Cylindrical Container   In a cylindrical container filled with an eutectic GaInSn alloy, an
electro-vortex flow (EVF) is generated by the interaction of a non-uniform
current with its own magnetic field. In this paper, we investigate the EVF
phenomenon numerically and experimentally. Ultrasound Doppler Velocimetry (UDV)
is applied to measure the velocity field in a cylindrical vessel. Second, we
enhance an old numerical solver by taking into account the effect of Joule
heating, and employ it for the numerical simulation of the EVF experiment.
Special focus is laid on the role of the magnetic field, which is the
combination of the current induced magnetic field and the external geomagnetic
field. For getting a higher computational efficiency, the so-called
parent-child mesh technique is applied in OpenFOAM when computing the electric
potential, the current density and the temperature in the coupled solid-liquid
conductor system. The results of the experiment are in good agreement with
those of the simulation. This study may help to identify the factors that are
essential for the EVF phenomenon, and for quantifying its role in liquid metal
batteries.

20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol