Multimodal Micromixer Obstacles for Agile Continuous Flow
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Solution Overview
Problem
Continuous flow reactors are inflexible and less agile, making them less suitable for process modifications, which limits their adoption in multi-product manufacturing despite offering faster mixing and consistency compared to batch reactors.
Innovation Solution
A multimodal micromixer design with converging sections having a width-to-depth ratio of 1:1 to 20:1 and intermediate channels with non-circular obstacles, arranged in periodic or aperiodic sequences, to enhance mixing efficiency and maintain re-configurability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous flow passive micromixer is used, then mixing speed and consistency are improved, but flexibility and adaptability for process modifications deteriorate
Solution Approach 1:
The micromixer is divided into modular sections (inlet section, mixing section with obstacles, outlet section) that can be independently designed and reconfigured. The obstacles in intermediate channels can be adjusted or removed to modify mixing patterns without redesigning the entire device, enabling both fast mixing and process adaptability.
Solution Approach 2:
The mixer employs dynamic flow path design where fluid flow patterns can be modified by changing obstacle configurations or flow rates. This allows the system to adapt to different mixing requirements while maintaining continuous operation, resolving the contradiction between fixed structure and flexible process modification.
2Manufacturing precision
If converging diverging type mixer is used, then mixing performance is improved, but device complexity increases
Solution Approach 1:
The design introduces obstacles only in intermediate channels where mixing enhancement is needed, rather than complicating the entire flow path. The converging sections maintain simple geometry with controlled width-to-depth ratios, while local obstacle placement provides enhanced mixing performance without overall structural complexity.
3Productivity
If obstacles are added to enhance mixing, then mixing efficiency is improved, but pressure drop increases
Solution Approach 1:
The obstacles are designed with specific geometric parameters (non-circular shapes, controlled sizes) and positioned at optimized locations in intermediate channels. The converging sections have controlled width-to-depth ratios that balance mixing enhancement with pressure drop management, achieving efficient mixing without excessive pressure increase.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves consistent mixing and reaction performance while maintaining agility, reducing mixing time and pressure drop, and facilitating efficient chemical reactions in continuous processes.
Implementation Method 1
end channel comprises plurality of converging sections having width to depth ratio ranging 1:1 to 20:1
Implementation Method 2
intermediate channels having plurality of obstacles for intensification of mixing
Data Source
AI summary
A multimodal micromixer obstacle for intensification of mixing and performing the reaction in a continuous manner is disclosed herein. The micromixer 100 comprises of plurality of inlets, an outlet and a plurality of channels. The end channels—of the channels, have plurality—of converging sections having width, to depth ratio ranging 1:1 to 20:1. The intermediate channels have at least, one obstacle having non-circular shape. Each converging section is incomplete ellipse, prolate or oblate shaped having, angle of curvature in the range of 90 to 270°. Axes of the inlets are coplanar and perpendicular to the channels. All the components of the micromixer are coplanar.