A Computational Study of Natural Convection in Vertical Rectangular Enclosures with Partiton Plates of Finite Thermal Conductivity

유한열전도율(有限熱傳導率)의 격판(隔板)을 갖는 수직구형(垂直矩形) 밀폐공간(密閉空間)에서의 자연대류(自然對流)에 관(關)한 수치적(數値的) 연구(硏究)

A theoretical study by numerical method has been performed on the natural convection of an air contained in enclosures. The enclosures have rectangular cross section with one vertical wall heated and the other cooled, and with two horizontal partition plates of finite thermal conductivity. Steady two-dimensional flow was assumed. The computation was executed by means of the Implicit Alternating Direction (I.A.D) finite-difference method. Two partition plates of Aluminium whose thickness were 0.05mm was employed in computation. Isothemals, streamlines, local Nusselt numbers and mean Nusselt numbers were obtained for various Grashof numbers and aspect ratio and these results were compared with those in the case of the enclosure with two horizontal insulated plates. From the present results, the heat transfer in the case of partition plates was greater than that in the case of insulation. This study suggests a method to measure the overall heat-transfer of coefficient in double walls which supported by partition plates for insulative construction.