Fluid flow maldistribution is considered as one of the main causes of performance deterioration in various energy and process systems,especially when parallel micro-or mini-channel fluidic networks are involved.The optimal flow distribution may not necessarily be uniform,but usually non-uniform which is far more difficult to be realized1,2.The insertion of a geometrically optimized baffle has been numerically confirmed as an effective solution to this issue3,but experimental validation is still lacking which is indispensable for bridging the gap between theory and practice.