Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Irreversibilities and efficiency at maximum power of heat engines:
  illustrative case of a thermoelectric generator   Thermoelectric generators are particularly suitable to investigate the
irreversible processes which govern the coupled transport of matter and heat in
solid-state systems. We study the efficiency at maximum power in the strong
coupling regime, where the thermal flux is proportionnal to the electrical
current inside the generator. We demonstrate that depending on the source of
irreversibility we obtain either the Curzon-Ahlborn efficiency for external
dissipation or a universal efficiency at maximum power for internal
dissipation. A continuous change between these two extremes is evidenced.
Effects of dissymetry of thermal contact conductance are also investigated.

20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc