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- W2912129081 abstract "Pressure losses and mixing in vibrating channels were analysed. The vibrations in the form of long-wavelength travelling waves were considered. Significant reduction of pressure losses can be achieved using sufficiently fast waves propagating downstream, while significant increase of such losses is generated by waves propagating upstream. The mechanisms responsible for pressure losses were identified and discussed. The interaction of the pressure field with the waves can create a force which assists the fluid movement. A similar force can be created by friction, but only under conditions leading to flow separation. An analysis of particle trajectories was carried out to determine the effect of vibrations on mixing. A significant transverse particle movement takes place, including particle trajectories with back loops. The downstream-propagating out-of-the phase waves provide a large reduction of pressure gradient and significant potential for mixing intensification. Analysis of energy requirements demonstrates that it is possible to identify waves which reduce power requirements, i.e. the cost of actuation is smaller than the energy savings associated with the reduction of pressure gradient. The fast forward moving waves provide an opportunity for the development of alternative propulsion methods which can be more efficient than methods based on the pressure difference." @default.
- W2912129081 created "2019-02-21" @default.
- W2912129081 creator A5029637116 @default.
- W2912129081 creator A5081512200 @default.
- W2912129081 date "2019-02-11" @default.
- W2912129081 modified "2023-09-23" @default.
- W2912129081 title "Reduction of pressure losses and increase of mixing in laminar flows through channels with long-wavelength vibrations" @default.
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- W2912129081 doi "https://doi.org/10.1017/jfm.2019.21" @default.
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