Fluid Structure Interaction Simulation Using Mediating Elements
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Solution Overview
Problem
Conventional fluid structure interaction simulation methods relying on mesh consistency face challenges in accurately simulating large-deformation problems and structure contact scenarios, often resulting in mesh mismatch and increased computational load, which limits their ability to perform accurate simulations without depending on mesh consistency.
Innovation Solution
The method introduces interaction mediating elements that move with the structure's displacement, defining correcting functions for pressure and velocity interactions between the fluid and structure, allowing simulations to be executed in a mesh mismatch state, using Green's theorem to apply viscous conditions and incompressibility constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mesh consistency is maintained between fluid and structure, then simulation accuracy is improved, but device complexity and computational load increase
Solution Approach 1:
The patent introduces interaction mediating elements as an intermediary component between the fluid mesh and structure mesh. These mediating elements receive pressure and velocity data from the fluid mesh and transfer them to the structure mesh, enabling accurate fluid-structure interaction simulation without requiring direct mesh consistency between the two domains. This mediator layer decouples the mesh requirements while maintaining simulation accuracy.
2Reliability
If mesh control is performed to maintain mesh consistency, then simulation reliability is improved, but productivity and computational efficiency decrease
Solution Approach 1:
The interaction mediating elements serve as a mediator that eliminates the need for complex mesh control operations. By transferring interaction data through these mediating elements, the system achieves reliable simulation results without performing computationally expensive mesh control calculations, thereby improving productivity while maintaining reliability.
3Adaptability or versatility
If interaction mediating elements are introduced, then adaptability to mesh mismatch is improved, but device complexity increases
Solution Approach 1:
The interaction mediating elements provide adaptability to mesh mismatch by serving as a flexible intermediary layer. Rather than requiring complex adaptive meshing algorithms or multiple simulation models, the patent uses these mediating elements to handle various mesh configurations, making the system adaptable without proportionally increasing overall complexity.
4Measurement precision
If conventional ALE method with mesh control is used, then simulation accuracy for large deformation is maintained, but computational load increases
Solution Approach 1:
The interaction mediating elements enable accurate large deformation simulation by properly transferring pressure and velocity data from fluid to structure meshes during deformation. This approach maintains simulation accuracy without requiring the computationally intensive mesh control operations that would otherwise be needed to maintain mesh quality during large deformations.
Data Source
AI summary
A fluid structure interaction simulation method includes a graph information forming process to form graph information of nodes obtained by discretizing a computing region for each of a fluid and a structure that are represented by meshes, and a main time development loop process to simulate a physical phenomenon. The loop process includes arranging IMEs (Interaction Mediating Elements) that move with a displacement of the structure, on a boundary of the structure, defining, within the IME, correcting functions of a pressure and a velocity of the fluid that interact with the pressure and the velocity of the fluid and the displacement of the structure, and executing a simulation based on the correcting functions, in a state in which the meshes of the fluid are mismatched to the meshes of the structure.