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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Spatial coupling of particle and fluid models for streamers: where nonlocality matters
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Spatial coupling of particle and fluid models for streamers: where nonlocality matters

机译:拖缆的颗粒和流体模型的空间耦合:在非局部性很重要的地方

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Particle models for streamer ionization fronts contain correct electron energy distributions, runaway effects and single electron statistics. Conventional fluid models are computationally much more efficient for large particle numbers, but create too low ionization densities in high fields. To combine their respective advantages, we here show how to couple both models in space. We confirm that the discrepancies between particle and fluid fronts arise from the steep electron density gradients in the leading edge of the fronts. We find the optimal position for the interface between models that minimizes the computational effort and reproduces the results of a pure particle model.
机译:流光离子化前沿的粒子模型包含正确的电子能量分布,失控效应和单电子统计量。传统的流体模型在计算较大粒子数时效率更高,但是在高场中产生的电离密度太低。为了结合它们各自的优点,我们在这里展示如何将两个模型在空间中耦合。我们确认粒子和流体前沿之间的差异是由前沿前沿中陡峭的电子密度梯度引起的。我们找到了模型之间的接口的最佳位置,该位置可以最大程度地减少计算工作量并重现纯粒子模型的结果。

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