Mass transfer from a flat surface to an impinging turbulent jet

Mass transfer between an impinging turbulent jet of water and a flat surface has been studied. The surface was coated with trans‐cinnamic acid, and thickness decrease profiles were measured. Local Sherwood numbers in the wall‐jet region {article}{empty}{document}(x/d > 4.5){document} were found to be independent of the nozzle to plate distance, and were correlated by {article}{empty}{document}Sh = 1.3Re 0.84 (x/d )- 1.27{document} for nozzle Reynolds numbers of 25,000 to 125,000. Agreement with published heat transfer data was reasonable. Average Sherwood numbers in the impingement region were found to decrease rapidly beyond a transition zone of 6 1/2 diameters from the nozzle.