Low frequency temperature forcing of chemical oscillations.

Low frequency temperature forcing of chemical oscillations.
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化学振荡的低频温度强迫。

DOI:
10.1039/c1cp21096c
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发表时间:
2011
期刊:
PCCP
影响因子:
--
通讯作者:
Novak J
Novak J
中科院分区:
--
文献类型:
--
作者:
Novak J

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本文通过实验研究了Belousov-Zhabotinsky (BZ)反应和Arrhenius温度依赖速率常数的Oregonator模型,研究了温度对化学振荡的低频强迫作用。随温度的强迫导致化学频率的调制。每个强迫周期的响应周期数由固有频率与强迫频率的比值给出,只有在该比值为整数且强迫幅值很小的情况下,模拟中才观察到锁相现象。本文还研究了管式反应器中流动分布振荡的全球温度强迫,并观察到波段位置随外部信号的同步变化,反映了温度对化学振荡的周期性调制。
The low frequency forcing of chemical oscillations by temperature is investigated experimentally in the Belousov-Zhabotinsky (BZ) reaction and in simulations of the Oregonator model with Arrhenius temperature dependence of the rate constants. Forcing with temperature leads to modulation of the chemical frequency. The number of response cycles per forcing cycle is given by the ratio of the natural frequency to the forcing frequency and phase locking is only observed in simulations when this ratio is a whole number and the forcing amplitude is small. The global temperature forcing of flow-distributed oscillations in a tubular reactor is also investigated and synchronisation is observed in the variation of band position with the external signal, reflecting the periodic modulation of chemical oscillations by temperature.
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