Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topology design of two-fluid heat exchange   Heat exchangers are devices that typically transfer heat between two fluids.
The performance of a heat exchanger such as heat transfer rate and pressure
loss strongly depends on the flow regime in the heat transfer system. In this
paper, we present a density-based topology optimization method for a two-fluid
heat exchange system, which achieves a maximum heat transfer rate under fixed
pressure loss. We propose a representation model accounting for three states,
i.e., two fluids and a solid wall between the two fluids, by using a single
design variable field. The key aspect of the proposed model is that mixing of
the two fluids can be essentially prevented without any penalty scheme. This is
because the solid constantly exists between the two fluids due to the use of
the single design variable field. We demonstrate the effectiveness of the
proposed approach through three-dimensional numerical examples in which an
optimized design is compared with a simple reference design, and the effects of
design conditions (i.e., Reynolds number, Prandtl number, design domain size,
and flow arrangements) are investigated.

13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th