Method of super hydrophobic orbit regulating air bubble division

Abstract

The invention discloses a method for regulating bubble splitting by superhydrophobic tracks in a plane. The super-hydrophobic track in the present invention is composed of equal-width segment track and diffusion segment track. When the bubble slides from the equal-width track to the diffusion track, the part of the bubble that enters the diffusion track undergoes short-term accelerated spreading under the attraction of the diffuse superhydrophobic wall and accelerates forward. At this time, it is in the constant-width track The bubble part of the bubble keeps the original small rising speed. The strong speed difference between the two directly leads to the tearing of the bubble. Under the action of the interfacial tension, the bubble begins to split into many small bubbles following the principle of the minimum surface free energy. , so far the preparation of tiny bubbles is completed. The invention is simple to prepare, low in cost, can quickly obtain (1‑2) mm small bubbles on the open wall surface, and can adjust the splitting by changing the width of the track and changing the angle between the diffusion section and the equal width section according to the needs of different scenarios bubble size.

Description

technical field [0001] The invention belongs to the technical field of multiphase flow, and in particular relates to a superhydrophobic track with a geometric gradient on an open wall, which is used to control and split rising bubbles in a liquid fluid, thereby obtaining (1-2) mm bubbles. Background technique [0002] Bubbles are widely used in petrochemical, energy, shipbuilding, sewage treatment and other engineering equipment and technical fields. The volume of rising bubbles in liquid fluids is important in mineral foam flotation, bubbling reactors, sewage treatment, hydraulic drag reduction and cell incubation. play an important role in the process. In froth flotation, the longer the residence time and movement history of the bubbles in the liquid phase, the better for mineral flotation; on the contrary, in microfluidic and heat exchange systems, the bubbles need to leave faster. By changing the size of the bubbles, not only the velocity of the bubbles can be changed, ...

AI Technical Summary

Problems solved by technology

[0003] Although it is possible to generate (1-2) mm bubbles through a microfluidic experimental device, the bubbles generated by this method are limited to movement in the microchannel, and the microfluidic experimental device will be blocked due to pipeline blockage. The situation of generating bubbles, so how to generate (1-2) mm bubbles on the open wall is particularly important

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