Structured Element With Differentiated Cavity Coatings
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Solution Overview
Problem
Existing structured elements with air cavities for fluid flow suffer from fluid settlement, leading to increased friction and reduced flow performance due to trapped air, which is not effectively addressed by current technologies.
Innovation Solution
A structured element with air cavities of specific dimensions and coatings, featuring alternating zones of different particle sets for repelling different fluids, preventing fluid deposition and maintaining air-filled cavities for reduced friction and enhanced mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air cavities are introduced to reduce friction and promote fluid flow, then fluid flow performance is improved, but fluids settle at the bottom of cavities causing increased friction and reduced performance
Solution Approach 1:
The cavity surface is divided into two distinct zones with different particle coatings: a first zone with particles that repel the first fluid, and a second zone with particles that repel the second fluid. This local differentiation ensures that each fluid type is repelled by the appropriate zone, preventing fluid settlement and maintaining air retention in the cavities, thereby resolving the contradiction between improved flow performance and reliable air retention.
2Ease of manufacture
If a single particle coating is applied to cavity surfaces, then manufacturing is simplified, but it cannot effectively repel multiple different fluid types
Solution Approach 1:
The cavity surface coating is segmented into two distinct zones: a first zone coated with particles for repelling the first fluid, and a second zone coated with different particles for repelling the second fluid. This segmentation allows each zone to be optimized for specific fluid types while maintaining a relatively simple overall manufacturing process, thus balancing ease of manufacture with multi-fluid versatility.
3Productivity
If cavity depth is increased to improve fluid support, then friction reduction is enhanced, but fluid settlement becomes more pronounced
Solution Approach 1:
The cavity surface is differentiated into zones with specific particle coatings that provide fluid repulsion properties. This local quality variation ensures that even in deeper cavities, fluids are repelled before they can settle at the bottom, maintaining the friction reduction benefits of increased cavity depth while preventing the harmful effect of fluid settlement.
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 solution effectively prevents fluid settlement in cavities, maintaining air-filled cavities and reducing friction, thereby improving fluid flow and mixing performance in applications like static mixers by creating turbulence through slippery and non-slippery zones.
Implementation Method 1
the first zone being coated with a first set of particles having properties of repulsion of the first fluid
Implementation Method 2
the second zone being coated with a second set of particles different from the first set and having properties of repulsion of the second fluid
Implementation Method 3
air is trapped in the cavities, creating a support for the fluid(s) with reduced friction
Data Source
Figure 1~2
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AI summary
A structured element (4) intended to be in contact with at least a first fluid and a second fluid, the structured element comprising a fluid circulation surface (6) structured by the presence of air cavities (8) with a depth between 100 and 1000 µm and distributed regularly over the structured surface (6), each cavity (8) being delimited by a cavity surface (20). According to the invention, the cavity surface comprises at least a first zone (Z1) and a second zone (Z2) following one another along a depth direction (18) of the cavity, the first zone being coated with a first set of particles (22a) having properties of repulsion against the first fluid, and the second zone being coated with a second set of particles (22b) different from the first set.