Oscillating Fluid Mixing Device for Low Resistance Nanoparticle Production
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Solution Overview
Problem
Microfluidic systems for producing fluid mixtures and nanoparticles are prone to blockages and high flow resistance, making them expensive and unsuitable for mass production, and they require precise control of temperature and dwell time.
Innovation Solution
A device with a mixing chamber and fluidic components that introduce fluids in an oscillating manner, using auxiliary flow channels to create turbulence and reduce flow resistance, allowing for efficient mixing at both laboratory and mass production scales.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If microfluidic systems with long flow channels are used, then mixing quality is improved, but flow resistance increases and blockages occur
Solution Approach 1:
The patent employs dynamic flow patterns including oscillating flow and turbulent flow instead of static laminar flow. The oscillating flow is achieved by periodically varying flow rates through the inlet openings, creating dynamic mixing conditions that improve mixing quality while reducing residence time and preventing blockages in the mixing chamber.
Solution Approach 2:
The patent utilizes periodic oscillation of fluid flows entering the mixing chamber. By periodically varying the flow rates and directions of the first and second fluids, the system creates alternating vortex patterns that enhance mixing efficiency while reducing the need for long channels, thereby preventing blockages.
2Manufacturing precision
If microfluidic systems with long flow channels are used, then mixing quality is improved, but flow resistance increases
Solution Approach 1:
The system transitions from static to dynamic flow conditions by implementing oscillating and turbulent flow patterns. This dynamic approach creates effective mixing through flow instability and vortex formation rather than relying on long channels, significantly reducing flow resistance and pressure requirements.
Solution Approach 2:
The patent changes key flow parameters including Reynolds number (transitioning to turbulent flow with Re > 600), oscillation frequency (at least 100 Hz), and flow rate ratios. These parameter changes enable efficient mixing in a compact chamber without the high flow resistance associated with long microfluidic channels.
3Manufacturing precision
If precise control of temperature and dwell time is implemented, then production quality is improved, but device complexity increases
Solution Approach 1:
The system achieves precise control of mixing parameters through self-regulating mechanisms. The oscillating flow patterns and turbulent mixing conditions naturally control dwell time and mixing intensity without requiring complex external control systems. The mixing chamber geometry and flow rate ratios provide inherent control over the mixing process.
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 device achieves high mixing quality with low flow resistance, enabling the production of fluid mixtures and nanoparticles with defined properties, suitable for applications such as parenteral nutrition and pharmaceuticals, and is cost-effective for both small-scale and large-scale production.
Implementation Method 1
For specifically changing the direction, alternating vortices, i.e. produced by colliding fluid flows within the fluidic component, or by a disruptive body within the fluidic component, can be used.
Implementation Method 2
As a result, turbulences can be produced in the mixing chamber, such that a high mixing quality can be achieved in the mixing chamber.
Implementation Method 3
In this case, the oscillating first fluid entering the mixing chamber can have a Reynolds number of over 600, approximately 1000, or even over 1000. The oscillation frequency of the oscillating first fluid can be at least 100 Hz, typically over 2000 Hz.
Data Source
AI summary
The invention relates to a device for mixing fluids and for producing a fluid mixture, including, a mixing chamber having a first inlet opening via which a first fluid can be introduced into the mixing chamber, a second inlet opening via which a second fluid can be introduced into the mixing chamber, and an outlet opening via which the fluid mixture including the first fluid and the second fluid can be discharged; a first supply unit, which is fluidically connected to the mixing chamber via the first inlet opening and is designed to carry the first fluid along a first fluid flow direction into the mixing chamber; and a second supply unit, which is fluidically connected to the mixing chamber via the second inlet opening and is designed to carry the second fluid along a second fluid flow direction into the mixing chamber. The first supply unit includes a fluidic component, including an outlet opening, which is fluidically connected to the first inlet opening of the mixing chamber, and at least one means for specifically changing the direction of the first fluid that flows through the fluidic component, in particular in order to cause an oscillation in space of the fluid at the outlet opening.