li System Coupling 14.0 – Two- way FSI with ANSYS FLUENT and ...
li System Coupling 14.0 – Two- way FSI with ANSYS FLUENT and ...
li System Coupling 14.0 – Two- way FSI with ANSYS FLUENT and ...
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© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
<strong>System</strong> Coup<strong>li</strong>ng <strong>li</strong> <strong>14.0</strong> – <strong>Two</strong>‐<br />
<strong>way</strong> <strong>FSI</strong> <strong>with</strong> <strong>ANSYS</strong> <strong>FLUENT</strong><br />
<strong>and</strong> <strong>ANSYS</strong> Mechanical<br />
<strong>ANSYS</strong> Regional Conference
2<br />
Fluid‐Structure Interaction App<strong>li</strong>cations<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Fluid‐structure interaction problems encompass a wide range of<br />
app<strong>li</strong>cations in many different industries.<br />
Aerospace, automotive, power generation, biomedical, etc.
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Fluid‐Structure Interaction<br />
• The solution to two two‐<strong>way</strong> <strong>way</strong> fluid‐structure fluid structure interaction<br />
requires co‐simulation between computational fluid<br />
dynamics <strong>and</strong> structural mechanics.<br />
• App<strong>li</strong>cations pp such as air foil flutter, , flow induced<br />
vibration from wind loading, membrane valves, pumps,<br />
elastic artery mode<strong>li</strong>ng <strong>and</strong> fuel tank sloshing require a<br />
two‐<strong>way</strong> fluid‐structure interaction solution to<br />
accurately l predict di the h bbehavior h i of f the h design. d i<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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<strong>System</strong> Coup<strong>li</strong>ng <strong>14.0</strong><br />
• Faci<strong>li</strong>tates simulations that require tightly integrated<br />
coup<strong>li</strong>ngs of analysis systems in the <strong>ANSYS</strong> portfo<strong>li</strong>o<br />
• Extensible architecture for range of coup<strong>li</strong>ng scenarios<br />
(one‐, ( , two‐ & n‐<strong>way</strong>, y, static data, , co‐simulation…) )<br />
• <strong>ANSYS</strong> Workbench user environment <strong>and</strong> workflow<br />
• St<strong>and</strong>ard execution management <strong>and</strong> data interfaces<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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<strong>System</strong> Coup<strong>li</strong>ng <strong>14.0</strong> –A Broad Range of<br />
Features<br />
• <strong>Two</strong>‐<strong>way</strong> <strong>Two</strong> <strong>way</strong> surface force/displacement coup<strong>li</strong>ng <strong>with</strong><br />
<strong>ANSYS</strong> Fluent <strong>and</strong> <strong>ANSYS</strong> Mechanical<br />
– Steady/static <strong>and</strong> transient two‐<strong>way</strong> <strong>FSI</strong><br />
• Workbench based setup <strong>and</strong> execution<br />
– Windows <strong>and</strong> Linux<br />
• Execution from comm<strong>and</strong> <strong>li</strong>ne outside of Workbench<br />
including cross cross‐platform platform execution<br />
• Integrated post‐processing <strong>with</strong> <strong>ANSYS</strong> CFD‐Post<br />
• Parallel processing for both CFD <strong>and</strong> structural<br />
solutions l ti <strong>with</strong> ith <strong>ANSYS</strong> HPC<br />
– RSM currently not supported<br />
• Restarts for fluid‐structure interaction<br />
• Parameterization, design exploration <strong>and</strong> optimization<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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<strong>System</strong> Coup<strong>li</strong>ng Schematic Setup<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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<strong>System</strong> Coup<strong>li</strong>ng Controls the Participant Solvers<br />
for Transient <strong>and</strong> Steady/Static Solutions<br />
• Solution update can ONLY be done via <strong>System</strong> Coup<strong>li</strong>ng<br />
• <strong>System</strong> Coup<strong>li</strong>ng ensures that the time duration <strong>and</strong><br />
time step settings are consistent across all participant<br />
solvers<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Setup Transient Structural Model<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Setup transient structural<br />
solution, structural<br />
boundary y conditions <strong>and</strong><br />
Fluid So<strong>li</strong>d Interface
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Setup Fluid Flow (<strong>FLUENT</strong>) Model<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Setup transient fluid solution, fluid<br />
boundary conditions <strong>and</strong> specify<br />
<strong>System</strong> Coup<strong>li</strong>ng Dynamic Mesh<br />
Zone for fluid‐structure interaction<br />
motion
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<strong>System</strong> Coup<strong>li</strong>ng Motion Type<br />
• <strong>System</strong> Coup<strong>li</strong>ng motion<br />
identifies zones that may<br />
participate in <strong>System</strong> Coup<strong>li</strong>ng<br />
• Allows user‐defined motion to be<br />
combined <strong>with</strong> <strong>System</strong> Coup<strong>li</strong>ng<br />
motion<br />
• Defaults to stationary motion<br />
type when not connected to<br />
<strong>System</strong> Coup<strong>li</strong>ng<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Update Setup Cells for Transient<br />
SStructural l<strong>and</strong> d Fl Fluid id Fl Flow (<strong>FLUENT</strong>)<br />
• State of <strong>System</strong> Coup<strong>li</strong>ng setup cell will be<br />
– Upstream data is now available for SC Setup<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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<strong>System</strong> Coup<strong>li</strong>ng Setup GUI<br />
Out<strong>li</strong>ne<br />
Details<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Chart<br />
Monitors<br />
Solution Information<br />
Text Monitors
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<strong>System</strong> Coup<strong>li</strong>ng Analysis Settings<br />
• Coup<strong>li</strong>ng End Time<br />
• Coup<strong>li</strong>ng Step Size<br />
• Minimum Number of Iterations<br />
per Coup<strong>li</strong>ng Step<br />
• Maximum Number of Iterations<br />
per Coup<strong>li</strong>ng Step<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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<strong>System</strong> Coup<strong>li</strong>ng Participants are Transient<br />
Structural <strong>and</strong> Fluid Flow (<strong>FLUENT</strong>)<br />
• Region <strong>and</strong> variable information<br />
is generated automatically via<br />
Update when analysis systems<br />
are first connected to <strong>System</strong><br />
Coup<strong>li</strong>ng<br />
• For <strong>FLUENT</strong>, all regions of type<br />
Wall are shown in SC Setup<br />
• For Mechanical, all regions of<br />
type Fluid So<strong>li</strong>d Interface are<br />
shown in SC Setup<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Recommended Way to Create Data<br />
TTransfer f Regions R i<br />
• Use Ctrl key to select a <strong>FLUENT</strong><br />
<strong>and</strong> Mechanical region pair <strong>and</strong><br />
select Create Data Transfer from<br />
right‐c<strong>li</strong>ck pop‐up menu<br />
• Automatically fills in the details<br />
for the data transfer region<br />
• Data transfers can be one‐<strong>way</strong><br />
(i.e. only transfer force or only<br />
transfer displacement) or two‐<br />
<strong>way</strong><br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Create Data Transfers<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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• Participant<br />
• Region<br />
• Variable<br />
• TTransfer f At<br />
Data Transfer Defines the Details for the<br />
SSource, Target T <strong>and</strong> d Data D Transfer T f Controls C l<br />
– Start of Iteration only<br />
• Under Relaxation Factor<br />
• Convergence Target<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Execution Control<br />
• Co‐Simulation Co Simulation Sequence<br />
– Transient or Static Structural will<br />
al<strong>way</strong>s be first in the co‐simulation<br />
sequence<br />
• DDebug b OOutput<br />
– Different levels of debug output for<br />
analysis <strong>and</strong> data transfers<br />
• Intermediate Results File Output<br />
– Controls the intervals for writing<br />
restart file information<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Executing <strong>System</strong> Coup<strong>li</strong>ng<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Alternative Method for Executing <strong>System</strong><br />
CCoup<strong>li</strong>ng <strong>li</strong><br />
• From schematic select Update using right‐c<strong>li</strong>ck right c<strong>li</strong>ck menu<br />
on <strong>System</strong> Coup<strong>li</strong>ng solution cell<br />
• Solution progress (% complete) can be monitored using<br />
View Progress g menu<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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Solution Information<br />
• Build information<br />
• Complete summary of coup<strong>li</strong>ng<br />
service input file<br />
• Analysis details<br />
• Participant summaries<br />
• Data transfer details<br />
• Mapping diagnostics<br />
• Time step <strong>and</strong> iteration summary<br />
• Solver field equation<br />
convergence summary<br />
• Data transfer convergence<br />
summary<br />
• <strong>FLUENT</strong>/MAPDL solver l output<br />
t t<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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X‐axis can be<br />
coup<strong>li</strong>ng time,<br />
step or<br />
iteration.<br />
Chart Monitors<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Default chart monitors<br />
show convergence<br />
history for all data<br />
transfers. f
23<br />
Adding Charts <strong>and</strong> Variables<br />
• Add charts by selecting Create Convergence Chart<br />
• Variables can be added or removed from charts<br />
– Data transfers, CFD <strong>and</strong> structural convergence<br />
norms<br />
• Chart properties are editable in same manner as other<br />
charts <strong>with</strong>in <strong>ANSYS</strong> Workbench<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
24<br />
Post Processing <strong>System</strong> Coup<strong>li</strong>ng<br />
• Transient Structural or Fluid Flow (<strong>FLUENT</strong>) Results cell<br />
for solver‐specific post‐processing<br />
• Add a Results <strong>System</strong> (<strong>ANSYS</strong> CFD‐Post) for unified<br />
post‐processing p p gof<br />
structural <strong>and</strong> fluid results<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
25<br />
Post Processing <strong>System</strong> Coup<strong>li</strong>ng<br />
• Oscillating Plate Verification<br />
– Excellent correlation between<br />
<strong>System</strong> Coup<strong>li</strong>ng, pub<strong>li</strong>shed<br />
data <strong>and</strong> MFX solver<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011
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© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
<strong>System</strong> Coup<strong>li</strong>ng – Examples
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Fuel Tank Sloshing<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Transient free<br />
surface flow in<br />
a ffuel ltank k<br />
<strong>with</strong> internal<br />
baffles.
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Mitral Valve<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Transient blood<br />
flow through a<br />
three h lleaf fmitral l<br />
valve, non‐<br />
Newtonian fluid<br />
<strong>and</strong> anisotropic<br />
hyperelastic<br />
tissue. Solution<br />
includes re re‐<br />
meshing of the<br />
fluid domain <strong>and</strong><br />
non<strong>li</strong>near<br />
contact.
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Reed Valve<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Transient<br />
response p of<br />
reed valve<br />
opening <strong>and</strong><br />
closing.<br />
Solution<br />
includes re‐<br />
meshing of the<br />
fl fluid id ddomain, i<br />
large<br />
deformations<br />
<strong>and</strong> non<strong>li</strong>near<br />
contact.
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Vibrating Rod<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Transient<br />
response of<br />
vibrating rod<br />
including<br />
vortex<br />
shedding.
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Deformation of a Leakage Path<br />
© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Steady state<br />
solution for a<br />
narrow<br />
representative<br />
leakage path in a<br />
fuel injector<br />
assembly<br />
clearance gap.
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© 2011 <strong>ANSYS</strong>, Inc. August 25, 2011<br />
Questions <strong>and</strong> d Answers
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