Conjugate natural convection between horizontal eccentric cylinders

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• 作者：Davood Nasiri ; Ali Akbar Dehghan ; Mohammad Reza Hadian
• 刊名：Heat and Mass Transfer
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：53
• 期：3
• 页码：799-811
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Engineering Thermodynamics, Heat and Mass Transfer; Industrial Chemistry/Chemical Engineering; Thermodynamics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-1181
• 卷排序：53

文摘

This study involved the numerical investigation of conjugate natural convection between two horizontal eccentric cylinders. Both cylinders were considered to be isothermal with only the inner cylinder having a finite wall thickness. The momentum and energy equations were discretized using finite volume method and solved by employing SIMPLER algorithm. Numerical results were presented for various solid–fluid conductivity ratios (KR) and various values of eccentricities in different thickness of inner cylinder wall and also for different angular positions of inner cylinder. From the results, it was observed that in an eccentric case, and for KR < 10, an increase in thickness of inner cylinder wall resulted in a decrease in the average equivalent conductivity coefficient (\(\overline{{K_{eq} }}\)); however, a KR > 10 value caused an increase in \(\overline{{K_{eq} }}\). It was also concluded that in any angular position of inner cylinder, the value of \(\overline{{K_{eq} }}\) increased with increase in the eccentricity.