The influence of a microstructure on heat conduction in solids is studied using the internal variable approach. Two variants of the internal variable treatment are compared by means of the numerical simulation of two-dimensional heat conduction in a plate under a localised thermal pulse loading. Computation of the same problem by the different internal variable descriptions produces qualitatively dissimilar results. The single internal variable approach leads to a diffusional type of the internal variable evolution. In contrast, the dual internal variable technique provides a wave-like evolution of the internal variables and, as the consequence, the corresponding wave-like heat transfer. The results are obtained in the dimensionless form, and parameters of models are chosen to emphasise the features of each model.

使用内部变量方法研究微观结构对固体中热传导的影响。通过局部热脉冲载荷下板中二维热传导的数值模拟，比较了内部变量处理的两种变体。通过不同的内部变量描述计算同一问题会产生性质不同的结果。单一内部变量方法导致内部变量演化的扩散类型。相比之下，双内变量技术提供了内部变量的波状演变，因此，提供了相应的波状传热。结果以无量纲形式获得，并选择模型参数以强调每个模型的特征。