Heat Transfer Characteristics of Inclined Annular Insulation Layer

Yasuyuki Takata, Kenji Fukuda, Shu Hasegawa, Hiroaki Shimomura, Konomo Sanokawa

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)


Numerical analysis has been performed on three-dimensional natural convection in thermal insulation layer enclosed with concentric inclined cylinders. Darcy’ law and Boussinesq, approximation are assumed to be applicable. Governing equations are numerically solved by means of successive over-relaxation methods for ranges of RaDa (a product of Rayleigh number Ra and Darcy number Da) from 1 to 1,000 and δ (an angle of inclination of cylinders from the horizon) from 0 to Π/2. Results show that the fluid particle path draws the co-axial double spiral and that the local Nusselt number Nu1 on the inner cylinder wall has its maximum value at Φ=0 and ξ=0 (bottom end), while Nu2 on the outer cylinder wall has its maximum at ξ=ξmax (top end) and Φ with some deviation from Π. However, the average Nusselt number depends largely on only RaDa and is hardly affected by the inclination.

ジャーナルNippon Genshiryoku Gakkaishi/Journal of the Atomic Energy Society of Japan
出版ステータス出版済み - 1981

!!!All Science Journal Classification (ASJC) codes

  • 原子力エネルギーおよび原子力工学


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