Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic cooling at Risoe DTU   Magnetic refrigeration at room temperature is of great interest due to a
long-term goal of making refrigeration more energy-efficient, less noisy and
free of any environmentally hostile materials. A refrigerator utilizing an
active magnetic regenerator (AMR) is based on the magnetocaloric effect, which
manifests itself as a temperature change in magnetic materials when subjected
to a varying magnetic field. In this work we present the current state of
magnetic refrigeration research at Risoe DTU with emphasis on the numerical
modeling of an existing AMR test machine. A 2D numerical heat-transfer and
fluid-flow model that represents the experimental setup is presented.
Experimental data of both no-heat load and heat load situations are compared to
the model. Moreover, results from the numerical modeling of the permanent
magnet design used in the system are presented.

7
The categories of this paper are: hep-th
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int