dr. ulrich heck1 structural analysis and fluid structure interactions (fsi) using i-deas and adina...
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Dr. Ulrich Heck 1
Structural Analysis and Fluid Structure Interactions (FSI) using I-deas and ADINA
Part II:
Fluid Structure Interaction
Dr. Ulrich Heck:
Dr. Heck
Consulting andEngineering
This presentation contains animated gifs (PowerPoint 2000 or higher required, full screen presentation)
Presented at 2002 PLM Europe Conference in Stuttgart, Oct, 2002
More information about our company and our simulation services:
www.dhcae.de
Dr. Ulrich Heck 2
FLUID-Structure Interactions:• Fluid flow causes deformation or movement of structure • Moveable or deformable structure effects fluid flow
Applications or processes (examples):• Biomedical:Artificial heart valves, flow through veins or arteries• Automotive: Flow in Pumps, valves, flow around car components• AerospaceFlow around missiles, flow around airfoil components• ProductionInjection moulding
Dr. Heck
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Dr. Heck
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Example Modelling
Solid region (Membrane)
Fluid Region
Fluid inlet
Fluid outlet
In general:Fluid model: tetrahedral elementsSolid Model: various element types possible (shell, various 2d or 3d-solid)
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Integration of ADINA in I-deas already presented by A. Hodgson
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Some special treatments in I-deas for FSI-modelling
• Two separate FE-models: solid model and fluid model
• Definition of elements with special properties (e.g. material labels)
or boundary conditions at the FSI boundaries and walls
• I-deas-ADINA interface translates and prepares the models
• Post-processing is possible in I-deas for both models separately
• Investigation of solid and fluid model: ADINA post-processing
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Validation of ADINA FSI:Tube with elastic wall
wall properties:thickness h, Young’s Modulus E
tube/flow properties:density , radius R
C0 = E h
2 R
wave propagation velocity:
modelling:transient FSI
ADINA managed to determinethe exact wave propagation velocity !
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1. Example: Valve model • Flow around body• Membrane fixed in valve close to fluid outlet
pressure at fluid inlet
velocity in tube
dynamic pressure
deformation of membrane
resistance of valve
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Dr. Heck
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Dr. Heck
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2. Example: Flexible tube compression• Flow through body• Tube with elastic wall• Increasing pressure load• Contact region
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3. Example: spring/mass analysis, damped by fluid viscosity• Transient analysis• Structural model: Shell elements • Increasing fluid viscosity: Increasing damping
massspring
Fluid with viscosity
1. Step deflection2. Step spring back
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Dr. Heck
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Walls
Deflected spring
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Dr. Heck
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Conclusions• ADINA is a very powerful tool to solve FSI problems• ADINA is fully integrated in I-deas • Use of I-deas meshing and modelling capabilities
Requirement for users:Experience in • Structural FEA and• CFD is important for modelling and interpretation of results
Dr. Heck
Consulting andEngineering
www.dhcae.de
Dr. Heck
Consulting andEngineering
www.c-a-e.com