Capillary Mesh Weave Layout for Faster Two-Phase Fluid Backflow
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Solution Overview
Problem
Conventional woven mesh capillary structures in two-phase fluid heat dissipation units have limited voids and meshes, leading to insufficient water containing ability, poor capillary attraction, and slow backflow, which results in reduced heat transfer performance and potential dry-out on the evaporation face.
Innovation Solution
A mesh woven structure with increased voids and adjustable line densities, formed by latitudinal and longitudinal lines that intersect and overlap, enhancing capillary attraction and water collection ability, and including flow-guiding micro-passages to direct fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional woven mesh capillary structure is used with simple intersection of weaving lines, then the structure is simple and easy to manufacture, but the number of voids is limited and water containing ability is insufficient
Solution Approach 1:
The patent divides the weaving lines into multiple sets (first weaving lines and second weaving lines) that intersect at different angles and densities. This segmentation creates multiple generations of voids (first voids from first weaving lines, second voids from second weaving lines) within the same structure, significantly increasing the total number of voids without requiring a completely complex redesign of the entire mesh architecture.
Solution Approach 2:
The patent introduces multiple dimensions of weaving by having first weaving lines extend in a first direction and second weaving lines extend in a second direction that is different from the first direction. This multi-dimensional arrangement creates overlapping voids of different sizes and shapes, transforming a two-dimensional mesh into a three-dimensional void structure that holds more working fluid.
2Quantity of substance
If conventional woven mesh capillary structure with fixed void size is used, then the manufacturing process is simple, but the capillary attraction is poor and water collection ability is insufficient
Solution Approach 1:
The patent creates different void sizes and shapes in different regions of the mesh structure. The first voids formed by first weaving lines have different dimensions than the second voids formed by second weaving lines. This local variation in void characteristics optimizes capillary attraction for different sections of the heat dissipation unit, allowing each region to serve its specific thermal management function while maintaining overall manufacturing simplicity.
3Speed
If conventional woven mesh capillary structure is used, then the structure is simple, but the backflow speed is slow and heat transfer performance is reduced
Solution Approach 1:
The patent creates a dynamic void structure where working fluid can flow through multiple pathways of different sizes. The mixture of first voids and second voids provides varied flow channels that adapt to the working fluid's movement, creating more efficient capillary-driven backflow compared to uniform void structures. This dynamic flow capability enhances heat transfer performance without requiring complex active control mechanisms.
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 enhanced mesh woven structure improves heat transfer performance by increasing voids and adjusting line densities, ensuring effective fluid backflow and preventing dry-out, thereby improving heat exchange efficiency.
Implementation Method 1
The mesh woven structure has better capillary attraction and water collection (containing) ability to enhance the capillary heat transfer performance
Data Source
AI summary
A mesh woven structure with capillary action is applied to a two-phase fluid heat dissipation unit. The mesh woven structure includes multiple latitudinal lines and multiple longitudinal lines. At least two longitudinal lines are selectively arranged as a longitudinal line set. The mesh woven structure is woven from the single latitudinal line and one cooperative longitudinal line set, which sequentially repeatedly intersect (and overlap with) each other. Accordingly, the number of the voids of the mesh woven structure is increased so that the mesh woven structure has better capillary attraction and water collection (containing) ability to greatly enhance the heat transfer performance.