2024
DOI: 10.1017/jfm.2024.694
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The use of patterned heating in controlling pressure losses within sloping channels

J.M. Floryan,
W. Wang,
Andrew P. Bassom

Abstract: The effectiveness of utilizing heating patterns as a drag-reduction tool in sloping channels is analysed. The usefulness of heating is judged by determining the pressure gradient required to maintain the same flow rate as in the isothermal case. The key to reducing pressure loss is the formation of separation bubbles, although these bubbles are washed away at relatively large Reynolds numbers. The bubbles reduce the direct contact between the stream and the side walls, thereby reducing the friction experienced… Show more

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