Effect of aspect ratio on flow boiling characteristics in microchannels
نویسندگان
چکیده
Abstract The effect of channel aspect ratio on flow boiling characteristics (flow patterns, heat transfer and pressure drop) HFE-7100 in copper multi-microchannel sinks was investigated experimentally. Three with base area 500 mm2, hydraulic diameter 0.46 mm (ratio width to height) 0.5, 1.0 2.0 were tested. average surface roughness the bottom nearly same three measured values 0.271, 0.286 0.304 µm. local rates determined simultaneously visualisation at mass flux ranging from 50 250 kg/m2s, wall 9.6 191.6 kW/m2, system 1 bar low inlet sub-cooling 5 K. results showed that, when increased, coefficient while drop decreased. However, rate calculated using sink higher smallest ratio, indicating an enhancement due largest area.
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ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2021
ISSN: ['1879-2189', '0017-9310']
DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2020.120587