Large-eddy simulations of flow over a jet-impinged wall-mounted cube in a cross stream

We report on large-eddy simulations of flow over a heated, jet-impinged, wall-mounted cube in a cross-flow, representing a simplified case of electronics cooling. The configuration consists of an in-line array of five cubes mounted on the bottom wall of a plane channel. The central heated cube is cooled by two mutually perpendicular streams of air: a channel flow at Re_c = 4800 and a round impinging jet Re_j = 5200 issued from an orifice in the opposite upper channel wall. The study was aimed at investigating flow structures and turbulence statistics, as well as their thermal signature and heat transfer on the cube surface. The comparison with measurement in a similar, though not identical, configuration shows qualitatively good agreement despite some important differences in flow conditions. The paper outlines the method applied and presents a selection of results.