NUMERICAL FLOW AND HEAT TRANSFER UNDER IMPINGING JETS: A REVIEW
Numerical studies related to the prediction of transport processes under laminar and turbulent jets impinging on flat surfaces are reviewed in light of the experimental data available under a limited range of the relevant parameters. Brief summaries are presented of the numerical techniques commonly employed and the turbulence models used to obtain results of engineering interest. Effects of various flow and geometric parameters on the flow, heat/mass transfer in the impingement and wall jet zones of single/multiple, round/slot jets impinging normally/obliquely on a stationary/moving surface which may be permeable or impermeable are discussed. Deficiencies in current numerical models are identified via comparison with relevant experimental data. It is concluded that the two-equation and algebraic stress models, which allow the integration of the variables up to the wall, provide the best hope for engineering calculations for the turbulent impinging jets in the near future. Prediction of the flow, heat and mass transfer under a single, semi-confined turbulent jet may be employed as a good test for new turbulence models.
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Illustration of composite TIMs with a percolation of spherical nanoparticles, and high aspect ratio nanowires. NANOSTRUCTURED THERMAL INTERFACES
Photograph of copper/diamond sintered wick structure. RECENT ADVANCES IN TWO-PHASE THERMAL GROUND PLANES
The microchannel with a single pillar used by Jung et al., and an SEM image of the pillar with a flow control slit at 180 deg (facing downstream). ADVANCED CHIP-LEVEL LIQUID HEAT EXCHANGERS
Schematics of thermal boundary conductance calculations. NONEQUILIRIUM MOLECULAR DYNAMICS METHODS FOR LATTICE HEAT CONDUCTION CALCULATIONS
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