Modeling Exudate Interaction with Absorbent Substrates
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Solution Overview
Problem
Designing absorbent articles poses challenges due to the difficulty in measuring fluid transport properties and simulating the interaction of Non-Newtonian bodily exudates with absorbent materials, which requires expensive physical testing and exposes personnel to hazardous substances.
Innovation Solution
A computer-based simulation method using finite element analysis and computational fluid dynamics to model the interaction between absorbent articles and bodily exudates, allowing for the prediction of absorbent article performance without physical prototypes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical testing of prototypes is used to evaluate absorbent article performance, then design evaluation data can be obtained, but the cost of development increases and personnel are exposed to hazardous substances
Solution Approach 1:
The patent creates a virtual copy of the absorbent article through computer-based FSI modeling. The model replicates the physical article's structure, materials, and fluid transport properties, allowing performance evaluation without physical prototypes. This virtual copying eliminates personnel exposure to hazardous substances while maintaining measurement accuracy through sophisticated simulation of exudate interaction.
Solution Approach 2:
The patent replaces physical mechanical testing with computational simulation. Instead of physically handling absorbent articles and exudates in laboratory settings, the system uses computer-based FSI models to simulate fluid transport, absorption, and distribution. This substitution eliminates direct personnel contact with hazardous materials while preserving the ability to evaluate design performance.
2Measurement precision
If physical prototypes are manufactured for testing, then performance evaluation is possible, but development cost and manufacturing complexity increase
Solution Approach 1:
The patent creates virtual replicas of absorbent articles through computer modeling, eliminating the need to manufacture physical prototypes. The FSI model incorporates geometric, material, and fluid properties to replicate prototype behavior digitally, reducing manufacturing complexity while maintaining evaluation accuracy.
Solution Approach 2:
The patent performs preliminary design evaluation through virtual modeling before physical manufacturing. By simulating fluid transport and absorption characteristics in the digital domain, designers can assess performance and make optimizations before committing to costly physical prototype production, thereby reducing overall development complexity.
3Measurement precision
If iterative computation methods are used to model exudate-substrate interaction, then measurement can be performed, but the model does not fully represent simultaneous real-world interaction
Solution Approach 1:
The patent replaces iterative computational approximation with a simultaneous FSI model that solves fluid and structural interactions in parallel. The coupled model computes exudate flow and substrate deformation together at each time step, capturing the true simultaneous nature of real-world interaction and improving model reliability while maintaining measurement precision.
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
Enables the evaluation and modification of absorbent article designs and materials virtually, reducing costs and exposure risks while accurately simulating the distribution and behavior of bodily exudates.
Implementation Method 1
transforming the model of the substrate to form a computer based model on the distribution of the bodily exudate using finite element analysis
Data Source
AI summary
Methods of using computer based models for simulating the physical behavior of bodily exudates with absorbent articles.