SPATIAL COHERENCE IN AN OPEN FLOW MODEL

A one-dimensional asymmetrically coupled map lattice model is studied extensively by numerical simulations. It is shown that with open bound ary conditions, the one-way coupled logistic lattices can exhibit spat ially uniform, but temporally chaotic states that are stable in the pr esence of low-level noise. It is found that the spatially uniform unst able steady state of the system can be stabilized via single point con trol or pinning at the boundary site. In the spatially coherent and te mporally chaotic regimes, a local finite disturbance may generate a pr opagating localized turbulent patch, which grows in size as it is swep t downstream.