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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?O) finite-difference method.
Two partition plates of Aluminum whose thickness were 0.05mm was employed in computation.
Isothemals, streamlines, local Nusselt numbers and mean Nusselt numbers obtained for various Grash of 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.
Steady two-dimensional flow was assumed.
The computation was executed by means of the Implicit Alternating Direction (I·A?O) finite-difference method.
Two partition plates of Aluminum whose thickness were 0.05mm was employed in computation.
Isothemals, streamlines, local Nusselt numbers and mean Nusselt numbers obtained for various Grash of 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.
목차
Abstract
記號說明
1. 緖論
2. 理論解析
3. 結果 및 考察
4. 結論
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