경계층과 비등효과를 고려한 외기대류계수에 관한 실험연구Experimental Study on Coefficient of air Convection with boundary layer and boiling effects

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The setting and hardening of concrete is accompanied with nonlinear temperature distribution caused by development of hydration heat of cement. In order to predict the exact temperature history in concrete structures it is required to examine thermal properties of concrete. In this study, the coefficient of air convection, which presents thermal transfer between surface of concrete and air, was experimentally investigated with variables such as velocity of wind, boiling and layer effects. Finally, the prediction model for equivalent coefficient of air convection was theoretically proposed. The coefficient of air convection in the proposed model increases with velocity of wind, and its dependance on wind velocity is varied with types of form. For determining the initial coefficient of air convection, boiling effects must be considered. The coefficient of air convection is affected by boundary layer with respect to the distance from the surface.
Publisher
한국콘크리트학회
Issue Date
2004-11
Language
KOR
Citation

2004 한국콘크리트학회 가을 학술대회, pp.711 - 714

URI
http://hdl.handle.net/10203/153174
Appears in Collection
CE-Conference Papers(학술회의논문)
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