Size-dependent transient nature of localized turbulence in transitional channel flow

It has been reported that a fully localized turbulent band in channel flow becomes sustained when the Reynolds number is above threshold. Here we show evidences bands are of transient nature instead. When length controlled to be fixed, lifetimes appear stochastic and exponentially distributed, sign memoryless nature. Besides increasing with number, mean lifetime also strongly increases length. Given always changes over time real flow, this size dependence may translate into dependence, which needs taken account clarifying relationship between transition directed percolation universality class.