LARGE-EDDY SIMULATION OF HEAT-TRANSFER FROM IMPINGING SLOT JETS

Nusselt number distributions are presented for impinging jet flow of a n array of slot nozzles (rectangular jets). The tools to calculate the present turbulent flow are large-eddy simulation (LES) using a dynami c subgrid stress model and the direct numerical simulation (DNS). The numerical code has been validated by comparing computed Nusselt number distributions on the impingement plate for two-dimensional flow with experimental results. A comparison between LES using a logarithmic law of the wall and the DNS shows good agreement of Nusselt number in the Reynolds number range of 600-3000. The velocity profile at the feed t ube exit strongly influences the maximum heat transfer at the stagnati on point.