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- W1993495115 abstract "Experiments were conducted to measure the onset of flow instability (OFI) (static flow instability) and dynamic unsteady flow in a compact heat sink consisting of 26 rectangular microchannels with 300 μm width and 800 μm depth. The planform area is 5.0 × 1.53 cm2. Tests were performed with water and methanol as working fluids with mass fluxes of 20–1200 kg/m2 s, inlet temperatures of 30, 50 and 70 °C and effective heating powers of 100–450 W. It was found that the onset of flow instability occurs at the outlet temperature of 93–96 °C, which was several degrees lower than the saturated temperature of 100 °C corresponding to the exit pressure. Fine bubbles were detected close to the channel exit, and they were moving out of the channel to form a unit circular bubble in the outlet plenum. Once the mass flux is lower than that of OFI, three types of oscillations were identified: large amplitude/long period oscillation superimposed with small amplitude/short period oscillation and small amplitude/short period oscillation. Thermal oscillations were always accompanying the above two oscillations. Observations through the microscope and physical explanations were given corresponding to the above oscillation flows. Similar tests were also performed with methanol as working fluid." @default.
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- W1993495115 date "2005-01-01" @default.
- W1993495115 modified "2023-10-14" @default.
- W1993495115 title "Static and dynamic flow instability of a parallel microchannel heat sink at high heat fluxes" @default.
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- W1993495115 doi "https://doi.org/10.1016/j.enconman.2004.02.012" @default.
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