CN-121972058-A - Snakelike micro-fluidic mixer integrated with spoiler

Abstract

The invention provides a snakelike microfluidic mixer integrated with a spoiler, and belongs to the technical field of mixers. The invention comprises a plurality of serially connected and mutually communicated snake-shaped mixing units which are of a snake-shaped bent flow passage structure, and a turbulence assembly which is arranged at the turning position of the snake-shaped mixing units. According to the invention, a combined structure of the snake-shaped mixing unit and the turbulence assembly is adopted, the stretching and folding of a fluid interface are realized by matching with the local vortex induced by the turbulence assembly through the centrifugal force speed gradient formed by the snake-shaped bend, the progressive accumulation mixing effect is realized, the dean vortex and chaotic convection of the fluid in the flowing process are realized, and the efficient passive mixing can be realized without external energy input. The mixing effect is obviously enhanced in the micrometer-scale flow channel, compared with the traditional mode of relying on long-flow channel diffusion, the mixing time and the flow channel length are greatly shortened, and meanwhile, the micro-fluidic system has the characteristics of compact structure, simplicity and convenience in operation and no extra energy consumption, and the synthesis efficiency and the integration level of the micro-fluidic system are effectively improved.

Inventors

• LI XIAOYU
• WANG ZHEN
• CHEN XUEYE
• CHEN XINKUN
• TANG TAO
• CHEN RUIYANG

Assignees

• 鲁东大学

Dates

Publication Date

20260505

Application Date

20260319

Claims (5)

1. 1. The snakelike micro-fluidic mixer of integrated spoiler, its characterized in that includes: The plurality of serially connected and mutually communicated snake-shaped mixing units are of a snake-shaped bent flow passage structure, are provided with a liquid inlet passage and a liquid outlet passage, and different fluids respectively flow into the converging passages of the snake-shaped mixing units through the liquid inlet passages to be converged, so that parallel laminar flows are formed preliminarily; the turbulent flow assembly is arranged at the turning part of the snakelike mixing unit; The fluid forms a speed gradient under the action of centrifugal force at the turning position of each stage of the serpentine mixing unit, the turbulence assembly divides the fluid to generate local vortex, the serpentine mixing unit of each stage repeatedly realizes the processes of fluid speed gradient formation and vortex disturbance, the mixing effect is accumulated step by step, and dean vortex and chaotic convection of the fluid are generated in the flowing process.
2. 2. The integrated spoiler serpentine microfluidic mixer of claim 1, wherein the spoiler assembly is a rectangular spoiler having a central axis of the rectangular spoiler inclined at an angle of 45 ° -50 °, a central axis of the rectangular spoiler having a length of 200 μm and a width of 150 μm.
3. 3. The integrated spoiler serpentine microfluidic mixer according to claim 1, wherein a number of the serpentine mixing units are arranged in a linear arrangement.
4. 4. The integrated spoiler serpentine microfluidic mixer of claim 1, wherein the liquid inlet channel is T-shaped having a first liquid inlet and a second liquid inlet.
5. 5. The integrated spoiler serpentine microfluidic mixer according to any one of claims 1-4, wherein the outlet channel and the converging channel are both in a rectilinear configuration and remain coaxially arranged.

Description

Snakelike micro-fluidic mixer integrated with spoiler Technical Field The invention relates to the technical field of mixers, in particular to a snakelike microfluidic mixer integrated with a spoiler. Background The microfluidic mixing technology uses a microfluidic chip as a core operation platform, is a micron-scale-based front-edge technology, and can accurately realize the treatment and control of fluid in a micro channel. The technology regulates and controls the flowing and mixing process of the solution through micro-processing technology such as micro-flow channels, etc., thereby efficiently completing various biochemical reactions. The common mixing mechanism is mainly turbulent motion and molecular diffusion. Turbulent mixing relies on a multi-scale vortex structure in the fluid, and rapid and efficient mixing of fluid components is realized through interaction among the vortices. The formation of turbulence is typically dependent on conditions of high reynolds number, high energy input or large gradients. However, when the system scale is scaled down to the microfluidic chip level, the volume of the receptor is limited, the fluid is in a laminar state, and it is difficult to form an effective turbulence effect. Therefore, most of the fluid mixing in the microchannel is achieved by means of molecular diffusion. However, molecular diffusion requires a sufficiently long flow channel to provide diffusion time, which makes it necessary to design a lengthy flow channel structure for a microfluidic chip, and thus reduces the synthesis efficiency of the system. Disclosure of Invention In view of the above, in order to solve the technical problem of low mixing efficiency under the microscale in the prior art, the invention provides a snakelike microfluidic mixer integrated with a spoiler, which adopts a combined structure of a snakelike mixing unit and a spoiler assembly, and combines a centrifugal force velocity gradient formed by a snakelike bend with a local vortex induced by the spoiler assembly to realize stretching and folding of a fluid interface, gradually accumulate a mixing effect, realize dean vortex and chaotic convection of fluid in the flowing process, and can realize efficient passive mixing without external energy input. The mixing effect is obviously enhanced in the micrometer-scale flow channel, compared with the traditional mode of relying on long-flow channel diffusion, the mixing time and the flow channel length are greatly shortened, and meanwhile, the micro-fluidic system has the characteristics of compact structure, simplicity and convenience in operation and no extra energy consumption, and the synthesis efficiency and the integration level of the micro-fluidic system are effectively improved. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a serpentine microfluidic mixer integrated with a spoiler, comprising: The plurality of serially connected and mutually communicated snake-shaped mixing units are of a snake-shaped bent flow passage structure, are provided with a liquid inlet passage and a liquid outlet passage, and different fluids respectively flow into the converging passages of the snake-shaped mixing units through the liquid inlet passages to be converged, so that parallel laminar flows are formed preliminarily; the turbulent flow assembly is arranged at the turning part of the snakelike mixing unit; The fluid forms a speed gradient under the action of centrifugal force at the turning position of each stage of the serpentine mixing unit, the turbulence assembly divides the fluid to generate local vortex, the serpentine mixing unit of each stage repeatedly realizes the processes of fluid speed gradient formation and vortex disturbance, the mixing effect is accumulated step by step, and dean vortex and chaotic convection of the fluid are generated in the flowing process. Compared with the prior art, the invention has the following beneficial effects: The high-efficiency mixing performance is realized by combining a speed gradient formed by the centrifugal force of the serpentine flow channel and the local vortex induced by the spoiler, breaking the laminar flow state under the microscale, enhancing the contact area and the disturbance degree of a fluid interface and realizing the high-efficiency mixing. The passive low-energy-consumption design is that external energy input such as sound field and magnetic field is not needed, the mixing is enhanced only by depending on the geometric structure of the flow channel, the equipment constitution is simplified, and the high-energy consumption problem of the active mixer is fundamentally avoided. The structure is compact and easy to operate, a complex external driving and controlling system is omitted, the whole structure of the device is compact, the operation flow is simplified, the technical requirements on operators are reduced, and the device is mo