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Analyses of dual-phase lag heat conduction in 1-D cylindrical and spherical geometry - An application of the lattice Boltzmann method

机译:一维圆柱和球形几何体中双相滞后热传导的分析-格子玻尔兹曼方法的应用

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Application of the lattice Boltzmann method to analyze dual-phase-lag heat conduction in a cylindrical and spherical geometry is reported. Thermal perturbation is caused by suddenly increasing the temperature of either or both inner and outer boundaries. Case of thermal perturbation with an adiabatic boundary is also considered. At different instants, radial temperature distributions are analyzed for a wide range of time lag ratios. To have an understanding how the dual-phase-lag heat conduction is different from the single-phase-lag one, in every case, temperature distribution are also presented for the single-phase-lag heat conduction. To check the accuracy of the lattice Boltzmann method results, the same problems are also solved using the finite difference method. Results of the two methods compare exceedingly well, and the lattice Boltzmann method has computational advantage over the finite difference method.
机译:报道了格子Boltzmann方法在圆柱和球形几何体中分析双相滞后热传导的应用。热扰动是由内部和外部边界之一或两者的温度突然升高引起的。还考虑了具有绝热边界的热扰动情况。在不同的时刻,针对大范围的时滞比分析径向温度分布。为了了解双相滞后热传导与单相滞后热传导有何不同,在每种情况下,还给出了单相滞后热传导的温度分布。为了检查格子Boltzmann方法结果的准确性,使用有限差分法也解决了相同的问题。两种方法的结果比较好,并且格子Boltzmann方法比有限差分方法具有计算优势。

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