Heat transfer enhancement in sphere-packed pipes under high Reynolds number conditions

Nao Seto; Kazuhisa Yuki; Hidetoshi Hashizume; Akio Sagara

doi:10.1016/j.fusengdes.2008.07.044

Heat transfer enhancement in sphere-packed pipes under high Reynolds number conditions

Nao Seto, Kazuhisa Yuki, Hidetoshi Hashizume, Akio Sagara

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Flow analysis in sphere-packed pipes (SPP) for different pipe to sphere diameter ratios was experimentally performed in order to clarify a relationship between the heat transfer and pressure drop characteristics. The experiments, using water as a working fluid, were carried out with Re_D = 2000-33,000 and Pr = 5.0-6.0. Experimental results of the pressure drop characteristics were compared with the Ergun's and Drag model correlations. Empirical correlations for the averaged Nusselt number are proposed, and SPP heat transfer performance is compared with that of the swirl flow. Furthermore, the applicability of the SPP system to the first wall cooling is also discussed from the temperature distribution aspect of the heating wall.

Original language	English
Pages (from-to)	1102-1107
Number of pages	6
Journal	Fusion Engineering and Design
Volume	83
Issue number	7-9
DOIs	https://doi.org/10.1016/j.fusengdes.2008.07.044
Publication status	Published - 2008 Dec 1

Keywords

Heat transfer enhancement
High Reynolds number
Sphere-packed pipes

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

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abstract = "Flow analysis in sphere-packed pipes (SPP) for different pipe to sphere diameter ratios was experimentally performed in order to clarify a relationship between the heat transfer and pressure drop characteristics. The experiments, using water as a working fluid, were carried out with ReD = 2000-33,000 and Pr = 5.0-6.0. Experimental results of the pressure drop characteristics were compared with the Ergun's and Drag model correlations. Empirical correlations for the averaged Nusselt number are proposed, and SPP heat transfer performance is compared with that of the swirl flow. Furthermore, the applicability of the SPP system to the first wall cooling is also discussed from the temperature distribution aspect of the heating wall.",

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T1 - Heat transfer enhancement in sphere-packed pipes under high Reynolds number conditions

AU - Seto, Nao

AU - Yuki, Kazuhisa

AU - Hashizume, Hidetoshi

AU - Sagara, Akio

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Flow analysis in sphere-packed pipes (SPP) for different pipe to sphere diameter ratios was experimentally performed in order to clarify a relationship between the heat transfer and pressure drop characteristics. The experiments, using water as a working fluid, were carried out with ReD = 2000-33,000 and Pr = 5.0-6.0. Experimental results of the pressure drop characteristics were compared with the Ergun's and Drag model correlations. Empirical correlations for the averaged Nusselt number are proposed, and SPP heat transfer performance is compared with that of the swirl flow. Furthermore, the applicability of the SPP system to the first wall cooling is also discussed from the temperature distribution aspect of the heating wall.

AB - Flow analysis in sphere-packed pipes (SPP) for different pipe to sphere diameter ratios was experimentally performed in order to clarify a relationship between the heat transfer and pressure drop characteristics. The experiments, using water as a working fluid, were carried out with ReD = 2000-33,000 and Pr = 5.0-6.0. Experimental results of the pressure drop characteristics were compared with the Ergun's and Drag model correlations. Empirical correlations for the averaged Nusselt number are proposed, and SPP heat transfer performance is compared with that of the swirl flow. Furthermore, the applicability of the SPP system to the first wall cooling is also discussed from the temperature distribution aspect of the heating wall.

KW - Heat transfer enhancement

KW - High Reynolds number

KW - Sphere-packed pipes

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