• Keine Ergebnisse gefunden

Stirring Effect on the Belousov-Zhabotinsky Oscillating Chemical Reactions in a Batch. Experimental and Modelling

N/A
N/A
Protected

Academic year: 2022

Aktie "Stirring Effect on the Belousov-Zhabotinsky Oscillating Chemical Reactions in a Batch. Experimental and Modelling"

Copied!
1
0
0

Wird geladen.... (Jetzt Volltext ansehen)

Volltext

(1)

Stirring Effect on the Belousov-Zhabotinsky Oscillating Chemical Reactions in a Batch. Experimental and Modelling

Yevhen Yu. Kalishyna, Małgorzata Rachwalskab, and Peter E. Strizhaka

aL. V. Pysarzhevsky Institute of Physical Chemistry of National Academy of Sciences of Ukraine, pr.Nauky 31, Kyiv, 03039, Ukraine

bFaculty of Chemistry, Jagiellonian University, ul.Ingardena 3, 30-060 Krak´ow, Poland Reprint requests to Dr. M. R.; Fax: +48-12-6340515; E-mail: rachwals@chemia.uj.edu.pl Z. Naturforsch.65a,132 – 140 (2010); received March 3, 2008 / revised July 30, 2009

We have studied the stirring effect on the time-delayed bifurcations of transient oscillations in the Belousov-Zhabotinsky (BZ) oscillating chemical reaction in a closed system. Experiments show that oscillations disappear through the time-delayed Hopf bifurcations, whose parameters depend on the stirring rate. The explanation of the stirring effect is based on the theories of diffusion-controlled reactions and hydrodynamic turbulence. We show that an increase of the stirring rate leads to an increase of the rate constant for the diffusion-controlled reaction. We propose a kinetic scheme that describes the effect observed in the experiments. A good agreement between the experimental data and the simulations is obtained.

Key words:Stirring Effect; Diffusion-Controlled Reactions.

Referenzen

ÄHNLICHE DOKUMENTE

Therefore, we propose that exercise elevates synaptic vestibular input to motor neurons by releasing neurotrophic factors promoting axonal sprouting and synapse formation in

Although these physico- chemical changes of biomass resulted from hydrothermal pretreatment provide insights into biomass recalcitrance [17], details in structural changes

Cerium(III) catalysts can replace manganese(II) in the classic Briggs-Rauscher oscillator also con- taining acid, iodate, hydrogen peroxide, and malonic acid.. Cerium(III)

In this paper we present a study of the stirring effect on the transient regimes in the BZ reaction catalyzed by ferroin in a batch. Our experiments show that the stirring rate

For a finite periodic structure of (AB) N and TE waves, let a plane wave be injected from vacuum into the 1DPC at an incident angle θ , then the transmis- sion ratio t ( ω ) for both

The behaviour of a system composed of malonic acid (MA), KBrO 3 , H 2 SO 4 , and ferroin was investigated in batch experiments at various concentrations of oxygen above the

15 – 0.6 M , some mixed mode oscillations (MMOs) were obtained, for a por- tion of the oxygen-nitrogen mix above the surface of the reaction mixture (ca. In such conditions some

For deeper analysis of relationship between socio-cultural factors and time perception, the further studies also can be focused on interaction of socio-cultural factors