随机相位和随机频率微波加热效应的数值模拟
Numerical simulation of microwave heating by random phase and random frequency microwave power generators
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摘要: 利用时域有限差分法（FDTD）并结合蛙跳技术，通过联合求解Maxwell方程组和热传导方程，模拟了水的微波加热过程，计算了烧杯中的水的温度分布；研究了随机相位和随机频率微波功率源合成时水的加热情况，对比了随机相位和随机频率非相干微波功率源与相干微波功率源作用下水的吸热和温升。计算结果表明，随机相位功率源进行合成时，烧杯中的水温分布更均匀，水所吸收的热量也较相干功率源合成加热时有较大增加；而随机频率功率源进行合成时，加热效果没有明显的变化。Abstract: Maxwell's equations combined with heat transport equation have been solved by using FDTD with the leapfrog technique to simulate the microwave heating to water. The temperature distribution of water in the beaker is obtained.The efficiency of microwave heating with random phase and random frequency microwave power generators is studied.The absorbed quantity of heat by water and the temperature rising using the synthesis generators are compared with the results of normal microwave generator. The results show that we can achieve more homogeneous distribution of temperature and higher absorbed quantity of heat by using the synethesis of random phase microwave power generators.But this effect is not significant by using the synthesis of random frequency microwave power generators.
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Key words:
- fdtd /
- leapfrog technique /
- microwave heating /
- random phase and random frequency
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