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首页> 外文期刊>International Journal of Heat and Mass Transfer >Retrieval of thermal properties in a transient conduction-radiation problem with variable thermal conductivity
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Retrieval of thermal properties in a transient conduction-radiation problem with variable thermal conductivity

机译：导热系数可变的瞬态传导辐射问题中的热特性检索

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摘要

This article reports an inverse analysis of a transient conduction-radiation problem with variable thermal conductivity. Simultaneous retrieval of parameters is accomplished by minimizing the objective function represented by the square of the difference between the measured and the assumed temperature fields. The measured temperature field is calculated from the direct method involving the lattice Boltzmann method (LBM) and the finite volume method (FVM). In the direct method, the FVM is used to obtain the radiative information and the LBM is used to solve the energy equation. With perturbations imposed on the measured temperature data, minimization of the objective function is achieved with the help of the genetic algorithm (GA). The accuracies of the retrieved parameters have been studied for the effects of the genetic parameters such as the crossover and the mutation rates, the population size, the number of generations and the effect of noise on the measured temperature data. A good estimation of parameters has been obtained.
机译：本文报告了具有可变热导率的瞬态传导辐射问题的逆分析。通过最小化目标函数，可以同时获取参数，该目标函数由实测温度场与假定温度场之间的差异的平方表示。根据涉及格子Boltzmann方法（LBM）和有限体积方法（FVM）的直接方法计算得出的温度场。在直接法中，FVM用于获得辐射信息，而LBM用于求解能量方程。通过对测得的温度数据施加扰动，借助遗传算法（GA）可以实现目标函数的最小化。对于遗传参数的影响，例如交叉和突变率，种群数量，世代数以及噪声对所测温度数据的影响，已经研究了所获取参数的准确性。已经获得了参数的良好估计。

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