Abstract Based on the inverse method, the dynamic thermo-physical parameters of the sand mold in the pressure-temperature coupled field were used for calculation. The optimized inverse method model of interface heat transfer coefficient (IHTC), which combined with the three-layer Dufort-Frankel difference equation, was developed to reveal the effects of pressure on IHTC. The results showed that the IHTC was the maximum at the beginning due to high heat flux at the interface under the influence of pressure, then a rapid reduction on account of the forming of air gap and variation of thermo-physical parameters, then slowly stabilize. Compared with the classical inverse model using the static thermo-physical parameters, the accuracy of the calculated temperature field obtained by the optimized inverse model was improved by 18% at most.

中文翻译：

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基于压力-温度耦合场动态热物理参数的界面传热系数模型优化

摘要 基于反演方法，利用压力-温度耦合场中砂型的动态热物理参数进行计算。结合三层Dufort-Frankel差分方程，建立了界面传热系数（IHTC）的优化逆方法模型，以揭示压力对IHTC的影响。结果表明，IHTC最初由于压力作用下界面处的高热通量而达到最大值，然后由于气隙的形成和热物理参数的变化而迅速减小，然后缓慢稳定。与采用静态热物理参数的经典反演模型相比，优化后的反演模型得到的温度场计算精度最多提高了18%。