H109 ANALYSIS OF FORCED CONVECTION IN A TUBE WITH CIRCULAR-SECTORED FINS(Electronics cooling-2)
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概要
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The present work investigates the heat transfer characteristics of a laminar fully developed forced convection in a circular-sectored finned tube with axially uniform heat flux and peripherally uniform wall temperature. The tubes with circular-sectored fins are modeled as a fluid-saturated porous medium. Using the Brinkman-extended Darcy model for fluid flow and the two-equation model for heat transfer, the analytical solutions for both velocity and temperature distributions are obtained and compared with the exact solution for fluid flow and the numerical solutions for conjugate heat transfer in order to validate the porous medium approach. The agreement between the solutions obtained using the porous medium approach and the conventional method is close within 1.1% and 2.5%, for the velocity and temperature profiles, respectively. Based on the analytical solutions, parameters of engineering importance are identified to be Darcy number Da and the effective conductivity ratio C, and their effects on fluid flow and heat transfer are studied. Also, the overall Nusselt number is obtained from the analytical solutions and limiting cases are studied in order to validate the thermal characteristics of a tube with circular-sectored fins.
- 一般社団法人日本機械学会の論文
- 2000-10-01
著者
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Kim Sung
Department of Bioengineering and Technology, College of Engineering, Kangwon National University
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Kim Sung
Department Of Anatomy
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Yoo Jae-wook
Department Of Mechanical Engineering Korea Advanced Institute Of Science And Technology
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Min Jung
Department of Mechanical Engineering Korea Advanced Institute of Science and Technology
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Kim Sung
Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, Yongin, Gyeonggi 446-701, Republic of Korea
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