Figure 2: Schematic of the experimental apparatus for the evaluation of convective heat transfer with an impinging jet.
From: Nano-inspired smart interfaces: fluidic interactivity and its impact on heat transfer

(a) Closed-loop system for impinging jet heat transfer evaluation. (b) Test section for installing a local temperature measuring sensor with a confined impinging jet and symmetric exhaust flow. (c) Schematic of liquid impinging-jet cooling in a confined channel and sequential fluidic boundary formations in the stagnation region and the wall jet region.