Text Box: Fluid Structure Interaction

The reciprocating compressor (above and below) is a typical FSI problem that is efficiently solved in 2-D using Direct FSI Coupling. This is because the Direct Coupling solution time is less than half the Iterative FSI coupling solution time. However, in 3-D the problem becomes much larger and is more efficiently solved using Iterative FSI Coupling due to memory and speed considerations.

Simulation of Propeller Flow with ADINA FSI. Automatic remeshing is utilised. Note that the structural response of the (von Mises stress) Propeller is shown.

Flowchart: Alternate Process: More Turbomachinery
FSI
Industrial examples
Flowchart: Alternate Process: More Biomedical
FSI examples

Simulation of Aortic Valve Using ADINA FSI  

Text Box: Pumps
Text Box: Valves
Text Box: Exhaust
Manifolds
Text Box: Air Bags
Text Box: Hydromounts
Text Box: Turbines
Text Box: Biomechanics
Text Box: Shock
Absorbers
Text Box: Tyre Hydroplaning
Text Box: Nuclear
Reactors
Text Box: Aerodynamic
Flutter
Text Box: LNG Tank Sloshing

The animation below shows the fluid-structure interaction analysis of an aortic valve. Here, the blood pressure causes the deformation of the leaflets and the opening and closing of the aortic valve, which in turn changes the boundary conditions for the blood flow.

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ADINA offers unrivalled fluid-structure interaction capabilities in one single program for the solution of problems where the fluids are fully coupled to general structures that can undergo highly nonlinear response due to large deformations, inelasticity, contact and temperature-dependency. A fully coupled fluid-structure interaction means that the response of the solid is strongly affected by the response of the fluid, and vice versa.

 

All flow properties / materials in ADINA CFD can be used with all ADINA Structures capabilities.

 

Fluid-structure interaction (FSI) occurs when fluid flow causes deformation of the structure. This deformation, in turn, changes the boundary conditions for the fluid flow.

 

We show just a few of the many industries that ADINA FSI is used in. Click on the area you are interested in.

How ADINA FSI Works

ADINA combines in one single program state-of-the-art computational solid and fluid dynamics schemes. For fluid flow analysis the user can choose between a nodal-based FCBI (Flow-Condition-Based Interpolation) scheme and a cell-based FCBI-C scheme.

 FCBI: This scheme makes it possible to solve very complex practical problems with highly nonlinear response.

 FCBI-C: This scheme allows the solution of very large practical problems.

 

Both schemes are applicable for low and high Reynolds numbers.

 

Once any part of the computational domain deforms, the Eulerian description of the fluid flow is no longer applicable. Therefore, ADINA solves the governing equations of fluid flow using an Arbitrary-Lagrangian-Eulerian (ALE) formulation.

 

ADINA FSI is unique because it offers two different methods, DIRECT FSI COUPLING and ITERATIVE FSI COUPLING, to solve the coupling between the fluid and the structural models.

 DIRECT FSI COUPLING. The fluid and solid equations are combined and treated in one system. This algorithm offers great robustness when solving very difficult FSI problems, for example, large deformations with "soft" structures or highly compressible flows abating very stiff structures. These types of problems are difficult to solve using the Iterative FSI Coupling.

 ITERATIVE FSI COUPLING. The fluid and solid equations are solved individually, in succession, always using the latest information provided by the other part of the coupled system. This algorithm requires less memory and therefore may be more applicable to solve very large problems.

 

The unique offering of the two procedures, Iterative and Direct FSI Coupling, provided by ADINA is essential to successfully solve a wide range of problems in the most efficient way.

ADINA ANALYSIS MODULES

FEA Structural

Thermal Mechanical Coupling

CFD

Multiphysics

Electromagnetics

ADINA User Interface

Thermal

Solid Modeller

Fluid Structure Interaction

CAD / CAE Interfaces