电磁脉冲加热Debye媒质的数值计算

Numerical Study for Electromagnetic Pulse Heating on Debye Media

对电磁脉冲加热Debye媒质进行了数值计算。从麦克斯韦方程组和Debye方程出发,我们修正了Debye媒质中的瞬态耗散功率的公式。该公式能有效避免传统定义中可能出现的瞬态耗散功率为负的情况。通过时间尺度变换,长的加热过程可以得到极大地压缩。在以前工作中,一般只能计算数十个脉冲周期,而通过该算法,则可以处理上亿个脉冲周期。另外,我们研究了长时间脉冲加热的效率和均匀性。结果表明,在同样的重复频率下,脉冲加热的效率与均匀性均低于连续微波。

Numerical study the electromagnetic pulse （EMP） heating on Debye media is presented. We revise the for- mula of the transient power dissipation in Debye media, which solves the problem of the possible negative power dissipation. Using time-scaling transformation, long thermal process can be compressed extremely. Comparing with the computation of heating process of several pulse periods in the previous work, the proposed fast algorithm can deal with the heating process up to billions of pulse periods. The algorithm is verified by a 2D model. The results reveal the electromagnetic pulse heating can not improve the temperature uniformity and enhance the heating efficiency compared with continuous microwave heating.