Inward propagating chemical waves in Taylor vortices.

Inward propagating chemical waves in Taylor vortices.
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泰勒涡旋中向内传播的化学波。

DOI:
10.1103/physreve.81.047101
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发表时间:
2010
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
Thompson BW
Thompson BW
中科院分区:
--
文献类型:
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作者:
Thompson BW

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对流-反应-扩散(ARD)波在Belousov-Zhabotinsky反应中稳定的泰勒-库埃特涡已经可视化使用磁共振成像和模拟使用一个适应的Oregonator模型。我们展示了如何传播波的行为取决于平流,化学和扩散的时间尺度的比例。在模拟中,向内传播的螺旋flamelets被观察到在高Damköhler数(Da)。在低Da时,反应本身分布在几个漩涡中,然后作为收缩的环形脉冲向内传播,这也是实验观察到的。
Advection-reaction-diffusion (ARD) waves in the Belousov-Zhabotinsky reaction in steady Taylor-Couette vortices have been visualized using magnetic-resonance imaging and simulated using an adapted Oregonator model. We show how propagating wave behavior depends on the ratio of advective, chemical and diffusive time scales. In simulations, inward propagating spiralflameletsare observed at high Damköhler number (Da). At low Da, the reaction distributes itself over several vortices and then propagates inwards as contracting ringpulses—also observed experimentally.