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외부로 휜이 있는 수직이중관내의 조합대류 유동에 관한 수치적 연구
손상석,이채문,임장순,Sohn, Sang-Suk,Lee, Chae-Moon,Yim, Jang-Soon 대한설비공학회 1985 설비저널 Vol.14 No.2
The motion of a fluid in the closed annular cavity formed by two concentric vertical cylinders with externally finned tube has been analysed by a numerical solutions of the equation of momentum and energy. For the calculation procedure, the fluid is assumed to have constant thermo-dynamic and transporties except for the density, which is temperature-dependent in the buoyancy term of the vertical momentum equation (Boussinesq approximation). The govern ins equations for velocity and temperature are solved by a finite difference technique which incoorporates a scheme for treating the coupled variables. Results are presented for a range of the Rayleigh number and for various values of the fin height and the number of fins.