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Planar passive micro mixer based on vortex forming structure enhanced mixing

A mixer and vortex-forming technology, used in fluid mixers, mixers, mixing methods, etc., can solve the problems of too small flow rate, long mixing time, etc., and achieve the effect of enhancing disturbance, increasing contact area, and improving mixing effect.

Inactive Publication Date: 2011-11-09
BEIJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

Although the mixing efficiency of the former is extremely high, the too small flow rate results in a long mixing time
Therefore, achieving rapid and high-speed mixing of fluids at the microscale remains a challenge.

Method used

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  • Planar passive micro mixer based on vortex forming structure enhanced mixing
  • Planar passive micro mixer based on vortex forming structure enhanced mixing
  • Planar passive micro mixer based on vortex forming structure enhanced mixing

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and the application of the planar passive micro-mixer based on the vortex structure intensified mixing in the preparation of nanofluids:

[0023] In the single-step preparation of nanofluids, the particle size of nanoparticles produced by the reaction is controlled by adjusting the mass flow rate of different component fluids. Therefore, the micro-mixer with this structure can be used to achieve rapid and efficient mixing of fluids at the micro-scale. The micro-mixer is made of polydimethylsiloxane (polydimethylsiloxane, referred to as PDMS). First, the transfer of the channel structure pattern and the curing of PDMS are realized on the single crystal silicon wafer by injection molding, and then the PDMS is removed from the silicon wafer. Peel off. Drill holes on the PDMS according to the position of the entrance and exit of the relative channel, and perform irreversible...

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Abstract

The invention discloses a planar passive micro mixer based on vortex forming structure enhanced mixing, relating to the field of micro fluid mixing in micro total analysis systems and micro fluid control chips as well as the related fields. The micro mixer is formed by connecting a straight passage, a cross passage, a first C-shaped passage and a second C-shaped passage; a passage outlet is formed at a straight passage outlet connected with the second C-shaped passage, and vortex forming structures are arranged in the C-shaped passages; and the end arm of the cross passage, which is opposite to the connected C-shaped passage, is provided with a second passage inlet (2), and the end arm vertical to the end arm is provided with a first passage inlet (2) and a third passage inlet (3) respectively. Compared with a planar passive micro mixer without the vortex forming structures, the planar passive micro mixer based on vortex forming structure enhanced mixing has the advantage of obviously enhancing the mixing strength of the micro fluid in the passages because several kinds of vortex generated by the vortex forming structures are generated in different dimensional planes respectively.

Description

technical field [0001] The invention relates to the technical field of micro-fluid mixing in a micro-total analysis system and a biochip, in particular to a planar passive micro-mixer based on a vortex structure and enhanced mixing that can quickly and efficiently mix micro-fluids. Background technique [0002] As an important part of microfluidic systems, micromixers are increasingly used in fields such as biological analysis, chemical synthesis and clinical testing due to their efficient and rapid mixing performance. When two or more fluids undergo chemical reactions, the effective mixing between them must be solved. Therefore, the micromixer is an important part of microfluidics. Since the channel structure of the microfluidic chip is on the order of microns, the Fluids are usually in a laminar flow state, so achieving rapid mixing of fluids at the microscale has also become crucial. Under different Reynolds numbers, the fluids in the channel are mixed through molecular ...

Claims

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Application Information

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IPC IPC(8): B01F5/06B01F3/08B01L3/00B01J19/00
Inventor 夏国栋李健周明正田欣平
Owner BEIJING UNIV OF TECH
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