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- W1956020565 abstract "This paper presents a study of fluid and thermal characteristics in a unique hybrid heat sink with application potential in high performance microelectronic cooling. The proposed method utilises the combined flow of pulsed fluid jet acting across the flow within a micro passage in the heat sink. An oscillating diaphragm generates an air jet with zero net mass discharge through the orifice while producing high fluid momentum outflow, hence termed “synthetic jet”. The jet and micro passage flow interaction is modelled using unsteady Reynolds-averaged Navier-Stokes equations with appropriate turbulence models. The simulation obtains the time-dependant flow profiles and the heat sink thermal performance for a range of diaphragm frequency and amplitudes. The analysis accounts for air compressibility and examines the effects of cross-flow on heat sink’s performance. The results indicate that the pulsed jet mechanism generates strong vortices that periodically impinge on the heated wall with intermittent interrupti on to boundary layer growth. The cross-flow drag significantly alter s the heat sink flow characteristics. This hybrid heat sink achieves up to 4.3fold thermal enhancement compared to a heat sink based only on microchannel flow. The air compressibility causes the jet discharge to cease temporarily at a certain diaphragm frequency. The proposed technique has the unique ability to produce strong fluid jet impingement and intense heat dissipation without additional fluid circuits or increas ed pressure drop." @default.
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- W1956020565 date "2010-01-01" @default.
- W1956020565 modified "2023-09-27" @default.
- W1956020565 title "Fluid Flow and Thermal Characteristics in a Microchannel With Cross-flow Synthetic Jet" @default.
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