The Proceedings of the Thermal Engineering Conference
Online ISSN : 2424-290X
2018
Session ID : 0088
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A Study on effects of dimple on flow and heat transfer characteristics
*Satoshi AkaikeItsuro HondaOsamu Kawanami
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

In recent years, with the influence of global warming, high-performance of Double Tube Heat Exchanger constituting car air conditioner is required. As a way to do that, a technique of laying dimples on the inner pipe wall surface of the heat exchanger attracts attention. In this study, numerical analysis was carried out by in-house code for the case where one dimple was laid on the bottom of the rectangular tube to clarify the characteristics of one dimple. As a result, from the viewpoint of the vortex structure in the dimple, teardrop shaped dimple had the best heat transfer characteristics compared to other shapes.

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© 2018 The Japan Society of Mechanical Engineers
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