CONTROL OF DYNAMIC STATES WITH TIME-DELAY BETWEEN 2 MUTUALLY FLOW-RATE COUPLED REACTORS

We present experiments and simulations of two mutually flow rate coupl ed chemical oscillators (minimal bromate (MB) oscillators), where the flow rate into one reactor is controlled by a species concentration (C e4+) of the other reactor. A delay time T is introduced between the ou tput (Ce4+ Concentration) of one reactor and the input (flow rate) int o the other so that the state of one reactor at a certain time t is de termined by the state of the other reactor at a previous time t - tau. Chaos does not occur in this MB system. Here we report how to control certain periodic and steady states. We observe two special phenomena, namely, oscillator death and rhythmogenesis. Oscillator death is indu ced by coupling two MB oscillatory states; as a result, two different steady states are produced. The reverse phenomenon, rhythmogenesis, is observed as the appearance of a common oscillatory state when two ide ntical MB stationary states are coupled. Numerical calculations using two coupled NFT models show good agreement with the experimental resul ts.