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http://dx.doi.org/10.4334/JKCI.2003.15.2.314

Experimental Study on Coefficient of Flow Convection  

Jeon, Sang-Eun (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Kim, Kook-Han (Korea Highway Corporation)
Kim, Jin-Keun (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Yang, Joo-Kyoung (Dept. of Civil and Environmental Engineering, Chungwoon University)
Publication Information
Journal of the Korea Concrete Institute / v.15, no.2, 2003 , pp. 314-322 More about this Journal
Abstract
Pipe cooling method is widely used for reduction of hydration heat and control of cracking in mass concrete structures. However, in order to effectively apply pipe cooling systems to concrete structures, the coefficient of flow convection relating the thermal transfer between inner stream of pipe and concrete must be estimated. In this study, a device measuring the coefficient of flow convection was developed. Since a variation of thermal distribution caused by pipe cooling has a direct effect on internal forced flows, the developed testing device is based on the internal forced flow concept. Influencing factors on the coefficient of flow convection are mainly flow velocity, pipe diameter and thickness, and pipe material. Using experimental results from the developed device, the coefficient of flow convection was calculated. Finally, a general prediction model was proposed by theoretical procedures. The proposed prediction model is able to estimate the coefficient of flow convection with flow velocity and material properties of pipe. From comparison with experimental results, the coefficient of flow convection by this model was well agreed with those by experimental results.
Keywords
pipe cooling system; coefficient of flow convection; thermal transfer; internal flow;
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