翅片配热效率分析的数值方法

M. Fakir, S. Khatun
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引用次数: 0

摘要

本文采用有限元法(FEM)和微分正交法(DQM)对翼片配热效率进行了分析研究。两种方法均得到了翅片表面温度分布的数值解。从温度和误差分布的角度对表面解进行了分析。也可以使用等间距(传统)和非等间距(最优)网格(节点)分布技术获得解决方案。求解了等节点分布和非等节点分布情况下的二维热传导问题(这里称为常规有限元法(CFEM)和常规DQM (CDQM)以及最优有限元法(OFEM)和最优DQM (ODQM))。将所得结果与精确结果进行了比较和研究。在OFEM解决方案中可以找到最好的结果。ODQM解与OFEM解非常接近,误差可以忽略不计,而CFEM和CDQM解随着节点(网格)点数目的增加而发散。
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A Numerical Approach for Efficiency Analysis of Heat Distribution Through Fin
In this paper an analysis is carried out to study the efficiency of heat distribution through fins using finite element method (FEM) and differential quadrature method ( DQM). Numerical solutions are obtained using both methods for temperature distribution over the fin surface. Analysis of surface solutions in terms of temperature and error distributions have been presented here. Solutions are also obtained using equally spaced (conventional) and non-equally spaced (optimum) mesh (nodal points) distribution techniques. Two-dimensional heat conduction problem has been solved in both equal and non-equal nodal points distribution cases (called here conventional FEM (CFEM) and conventional DQM (CDQM) and optimum FEM (OFEM) and optimum DQM (ODQM)). The obtained results are compared and investigated with exact results. The best results are found in OFEM solutions. It is also found that, ODQM solutions reach very close to OFEM solutions with negligible error, whereas CFEM and CDQM solutions diverges with increasing number of nodal(mesh) points.
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