We study KPP pulsating front speed-up and effective diffusivity enhancement by general periodic incompressible flows. We prove the existence of and determine the limits and D e (A)/A 2 as the flow amplitude A → ∞, with the minimal front speed and D e (A) the effective diffusivity in direction e.
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机译：我们研究了一般周期性不可压缩流对KPP脉动前加速和有效扩散率的提高。我们证明存在并确定极限值D e （A）/ A 2 作为流量幅度A→∞，并且具有最小的正面速度和D e （A）沿e方向的有效扩散率。
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