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- W4280553611 abstract "We present a comparative evaluation of the generated entropy fields obtained via two different approaches: 1) a direct integration of the transport equation for the entropy, and 2) an a posteriori processing of the thermal and velocity fields produced by the energy equation. In both cases, we numerically solve the Reynolds-averaged equations with a two-layer model to account for the turbulent effects. The process under consideration takes place inside a heat exchanger with two helical fin-and-tube configurations, which include plain and serrated fin geometries. Our analysis suggests that 1) the entropy fields produced with the two calculation approaches may differ, depending on how the convective–diffusive effects are computed relative to the generation effects; 2) the serrated fin geometry represents a significant advantage over the plain geometry when installed in the first three stages of the tube array; and 3 the convective entropy transport is higher than the diffusive entropy transport by one order of magnitude. These results are relevant to the design of efficient heat exchangers for aerospace applications." @default.
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- W4280553611 date "2022-10-01" @default.
- W4280553611 modified "2023-10-03" @default.
- W4280553611 title "Total Entropy Field in a Complex Helical Fin-and-Tube Heat Exchanger" @default.
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- W4280553611 doi "https://doi.org/10.2514/1.t6491" @default.
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