Use of Time-Depend Effects for Mixing and Separation of the Two-Phase Flows

Authors: N. B. Fedosenko, A.A Iatcenko, S.A. Levanov

Abstract:

The paper shows some ability to manage two-phase flows arising from the use of unsteady effects. In one case, we consider the condition of fragmentation of the interface between the two components leads to the intensification of mixing. The problem is solved when the temporal and linear scale are small for the appearance of the developed mixing layer. Showing that exist such conditions for unsteady flow velocity at the surface of the channel, which will lead to the creation and fragmentation of vortices at Re numbers of order unity. Also showing that the Re is not a criterion of similarity for this type of flows, but we can introduce a criterion that depends on both the Re, and the frequency splitting of the vortices. It turned out that feature of this situation is that streamlines behave stable, and if we analyze the behavior of the interface between the components it satisfies all the properties of unstable flows. The other problem we consider the behavior of solid impurities in the extensive system of channels. Simulated unsteady periodic flow modeled breaths. Consider the behavior of the particles along the trajectories. It is shown that, depending on the mass and diameter of the particles, they can be collected in a caustic on the channel walls, stop in a certain place or fly back. Of interest is the distribution of particle velocity in frequency. It turned out that by choosing a behavior of the velocity field of the carrier gas can affect the trajectory of individual particles including force them to fly back.

Keywords: Two-phase, mixing, separating, flow control

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1077890

References:

[1] Sturman R, Ottino J.M., Wiggins S. (2006). The mathematical foundations of mixing.
[2] Karniadakis G., Beskok A., Aluru N. (2005). Microflows and Nanoflows. Fundamentals and simulation.
[3] Num-Trung Nguyen (2008). Micromixers. Fundamentals, design and fabrication.
[4] Ottesen J. T., Olufsen M.S., Larsen J.K. (2004).Applied mathematical models in human physiology.
[5] Malestrom (2009)Lung Mechanics - An Inverse Modeling Approach