A new monolithic design approach for topology optimization for transient fluid–structure interaction system

Yoon, Gil Ho

doi:10.1016/j.cma.2022.115729

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…Simulating the pulsatile flow of blood in arteries, we aimed to capture the stresses induced in arterial walls, crucial for understanding conditions like aneurysms (See Table 3) [28][29][30][31][32][33][34].…”

Section: Blood Flow-induced Stresses In Arterial Wallsmentioning

confidence: 99%

Coupled Multiphysics Simulation using FEA for Complex Fluid-Structure Interaction Problems

Agrawal,

Kumari,

Maan

et al. 2023

E3S Web Conf.

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In the realm of mechanical engineering, the accurate prediction of fluid-structure interaction (FSI) is paramount for the design and analysis of systems where fluids and structures coexist and interact. This research paper presents a novel approach to address complex FSI problems using coupled multiphysics simulation through Finite Element Analysis (FEA). The proposed methodology integrates advanced computational algorithms to capture the intricate interplay between fluid dynamics and structural mechanics, ensuring a more holistic representation of real-world scenarios. The developed framework was tested on a variety of benchmark problems, ranging from aeroelastic flutter in aircraft wings to blood flow-induced stresses in arterial walls. Results indicate a significant enhancement in prediction accuracy and computational efficiency compared to traditional decoupled methods. Furthermore, the study delves into the challenges faced during the coupling process, offering solutions to mitigate numerical instabilities and enhance convergence rates. The findings of this research not only pave the way for improved design and safety protocols in industries such as aerospace, biomedical, and civil engineering but also underscore the potential of Multiphysics simulation in unravelling the complexities of the natural world.

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Section: Blood Flow-induced Stresses In Arterial Wallsmentioning

confidence: 99%

Coupled Multiphysics Simulation using FEA for Complex Fluid-Structure Interaction Problems

Agrawal,

Kumari,

Maan

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…The authors use it to calculate the aerodynamic response and linear elastic equations for the structural response in a one-way coupling. Yoon (2023) reports transient FSI topology optimization results by adding inertial terms to the formulation described in Yoon (2010). The inlet velocity is varied in time.…”

Section: Fluid-structure Interactionmentioning

confidence: 99%

Otimização topológica para o projeto de selos labirinto considerando escoamento turbulento e interação fluido-estrutura com variáveis discretas e contínuas.

Souza

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Labyrinth seals are mechanical devices used for sealing turbomachinery equipment in applications such as methane (CH 4 ) and carbon dioxide (CO 2 ) compression. Therefore, the optimization of labyrinth seals is crucial for controlling the increase in temperature of the atmosphere because CH 4 and CO 2 are greenhouse gases (GHGs). In this context, this work aims to develop topology optimization formulations by considering turbulent flow and fluid-structure interaction (FSI) and to apply these formulations to the design of efficient labyrinth seals, reducing GHGs emissions. The main challenges of labyrinth seal topology optimization are avoiding the channel closure, assigning different velocities for the rotor and stator, and avoiding solid islands disconnected from the walls. This work proposes two topology optimization algorithms that attend to these requirements and compare them. The first algorithm is based on binary design variables and one extension of the TOBS method (Topology Optimization of Binary Structures) that avoids undesired material distributions. The second algorithm is based on continuous design variables and one method that considers the fluid channel as the interface between the rotor and stator. This last algorithm requires the use of connectivity constraints to avoid solid islands. Two connectivity constraints are investigated, one based on fluid-structure interaction and the other on a virtual heat transfer problem. The binary and continuous approaches are compared for laminar and turbulent flows. As some designs present material distributions that cannot be assembled directly due to interference between the rotor and stator, this work also investigates the combination of the concepts of labyrinth seals and inflatable seals, which are seals that deform when pressurized. This characteristic may be used to adjust the clearance between the assembled parts and to reach complex assemblies, for example. The labyrinth seal model considers turbulence, which influences labyrinth seal performance. The Reynolds Averaged Navier-Stokes (RANS) equations closed with the Spalart-Allmaras turbulence model are used to model the flow in the labyrinth seal cavity. The inflatable seal design considers the static equilibrium of structures subjected to pressure loads and large deformations. The finite element method (FEM) is used to solve the equilibrium equations. The sensitivity analysis is carried out with automatic differentiation. The optimization problem is solved with the CPLEX ® and MMA (Method of Moving Asymptotes) optimizers. Three labyrinth seal configurations are optimized: straight-through, staggered and stepped. The inflatable seals are designed by topology optimization with pressure loads and large deformations.

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Inverse design of magneto-active metasurfaces and robots: Theory, computation, and experimental validation

Wang

Zhao

Zhang

2023

Computer Methods in Applied Mechanics and Engineering

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A new monolithic design approach for topology optimization for transient fluid–structure interaction system

Cited by 4 publications

References 41 publications

Coupled Multiphysics Simulation using FEA for Complex Fluid-Structure Interaction Problems

Coupled Multiphysics Simulation using FEA for Complex Fluid-Structure Interaction Problems

Otimização topológica para o projeto de selos labirinto considerando escoamento turbulento e interação fluido-estrutura com variáveis discretas e contínuas.

Inverse design of magneto-active metasurfaces and robots: Theory, computation, and experimental validation

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