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International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Convective Heat Transfer in an Oscillating Flow

Mamoru Ozawa
Department of Safety Science, Kansai University, 7-1 Hakubai-cho, Takatsuki-shi, Osaka 569-1098, Japan

Masatoshi Shinoki
Department of Mechanical Engineering, Kansai University, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

Kenji Nagoshi
Department of Mechanical Engineering, Kansai University, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

Eriko Serizawa
Department of Mechanical Engineering, Kansai University, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

DOI: 10.1615/IHTC12.1330
6 pages

Abstract

Oscillatory flow heat transfer is an essential factor for the design of a stack and heat exchangers of an acoustic refrigerator, and a regenerator in a Stirling-cycle refrigerator. Aiming to have a design basis for such components, experimental and analytical investigations have been conducted into the heat transfer characteristics in an incompressible oscillating flow in a tube. The modes of heat transfer are classified into laminar and turbulent flow heat transfers. The boundary between these modes is approximately given by Ohmi & Iguchi's criterion for laminar-to-turbulent transition. The space-cycle averaged heat transfer coefficients are well correlated with Nusselt, Reynolds and Prandtl numbers, being similar to forced convective heat transfer, and in addition, Strouhal numbers representing the effect of flow oscillation.

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