Transcript here - Dr. Heck Consulting and Engineering

Dr. Heck
Consulting and
Engineering
Dr. Ulrich Heck:
Structural Analysis and Fluid Structure Interactions (FSI)
using I-deas and ADINA
Part II:
Fluid Structure Interaction
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:
Dr. Ulrich Heck
www.dhcae.de
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Dr. Heck
Consulting and
Engineering
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
• Aerospace
Flow around missiles, flow around airfoil components
• Production
Injection moulding
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Example Modelling
Fluid outlet
Solid region
(Membrane)
Fluid Region
In general:
Fluid model: tetrahedral elements
Solid Model: various element types
possible (shell, various 2d or 3d-solid)
Fluid inlet
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Integration of ADINA in I-deas
already presented by A. Hodgson
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
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
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Validation of ADINA FSI:Tube with elastic wall
tube/flow properties:
density r, radius R
wall properties:
thickness h, Young’s Modulus E
wave propagation velocity:
C0 =
Eh
2Rr
modelling:
transient FSI
ADINA managed to determine
the exact wave propagation velocity !
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
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
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
2. Example: Flexible tube compression
• Flow through body
• Tube with elastic wall
• Increasing pressure load
• Contact region
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
3. Example: spring/mass analysis, damped by fluid viscosity
• Transient analysis
• Structural model: Shell elements
• Increasing fluid viscosity: Increasing damping
spring
mass
1.
2.
Step deflection
Step spring back
Fluid with viscosity h
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Walls
Deflected spring
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
Dr. Ulrich Heck
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Dr. Heck
Consulting and
Engineering
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 and
Engineering
www.dhcae.de
Dr. Ulrich Heck
www.c-a-e.com
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