Enhancement of fixed‐grid methods towards complex fluid–structure interaction applications

2008 ◽  
Vol 57 (9) ◽  
pp. 1227-1248 ◽  
Author(s):  
Axel Gerstenberger ◽  
Wolfgang A. Wall
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Fixed Grid ◽  
Complex Fluid

scholarly journals Comparison of a fixed-grid and arbitrary Lagrangian–Eulerian methods on modelling fluid–structure interaction of the aortic valve

2019 ◽  
Vol 233 (5) ◽  
pp. 544-553 ◽  
Author(s):  
Akram Joda ◽  
Zhongmin Jin ◽  
Jon Summers ◽  
Sotirios Korossis
Keyword(s):  
Finite Element ◽  
Aortic Valve ◽  
Fluid Structure Interaction ◽  
Arbitrary Lagrangian Eulerian ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Fixed Grid ◽  
Eulerian Method ◽  
Arbitrary Lagrangian Eulerian Method ◽  
Valve Dynamics

This study was aimed at assessing the robustness of a fixed-grid fluid–structure interaction method (Multi-Material Arbitrary Lagrangian–Eulerian) to modelling the two-dimensional native aortic valve dynamics and comparing it to the Arbitrary Lagrangian–Eulerian method. For the fixed-grid method, the explicit finite element solver LS-DYNA was utilized, where two independent meshes for the fluid and structure were generated and the penalty method was used to handle the coupling between the fluid and structure domains. For the Arbitrary Lagrangian–Eulerian method, the implicit finite element solver ADINA was used where two separate conforming meshes were used for the valve structure and the fluid domains. The comparison demonstrated that both fluid–structure interaction methods predicted accurately the valve dynamics, fluid flow, and stress distribution, implying that fixed-grid methods can be used in situations where the Arbitrary Lagrangian–Eulerian method fails.

Recent Advances in Scaling Up Complex Fluid-Structure Interaction Simulations

2017 ◽  
Author(s):  
Rainald Lohner ◽  
Fernando Mut ◽  
Fernando Camelli ◽  
Joseph D. Baum ◽  
Orlando Soto ◽  
...  
Keyword(s):  
Fluid Structure Interaction ◽  
Scaling Up ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Recent Advances ◽  
Complex Fluid

Control Design for High-Fidelity Cyber-Physical Systems With Applications to Experimental Fluid-Structure Interaction Studies

2017 ◽  
Author(s):  
Rajmohan Waghela ◽  
Matthew Bryant
Keyword(s):  
Fluid Structure Interaction ◽  
Control Design ◽  
Interaction Force ◽  
Physical Structure ◽  
Model Matching ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Complex Fluid ◽  
Stiffness And Damping

A cyber-physical system (CPS) combines active actuation, sensing, and a control algorithm to virtually replicate a physical structure with desired inertia, stiffness, and damping properties. The interaction of a CPS with a fluid flow can be used to study complex fluid-structure interaction phenomena. This paper highlights some of the control design challenges associated with the design of CPS and elaborates on issues pertaining to performance and lag. A model for including the interaction force and a potential work-around to inertia compensation are presented. Finally, a case study compares classical PID control with H∞ based model-matching control design.

Sign in / Sign up

Export Citation Format

Share Document