Mesh Morphing and Optimizer - Ansys · You pick your goal (optimization function) ANSYS Fluent drives the optimization The mesh is morphed to the new selected shape (no Mesh Morpherand
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Mesh Morphing and Optimizer
© 2011 ANSYS, Inc. May 14, 20121
Gilles Eggenspieler
Senior Product Manager
You pick your goal (optimization function)
ANSYS Fluent drives the optimization
The mesh is morphed to the new selected shape (no
Mesh Morpher and Optimizer
© 2011 ANSYS, Inc. May 14, 20122
The mesh is morphed to the new selected shape (no
remeshing)
The process continues until the best shape is found
Fully Integrated Feature-No Added Cost
Fully Integrated Feature in 13.0 and 14.0
© 2011 ANSYS, Inc. May 14, 20123
• New improved morphing algorithms
• Ability to use parameters to define objective
functions
– Minimizes the need for UDF writing
• Ability to apply movement/deformation restrictions
Improvements in 14.0
© 2011 ANSYS, Inc. May 14, 20124
• Ability to apply movement/deformation restrictions
on specific surfaces
• Ability to plot and track the value of the objective
function
• Ability to execute commands before or after each
design iteration
Fluent Morpher-Optimization Feature
• Allows users to optimize product
design based on shape
deformation to achieve design
objective
© 2011 ANSYS, Inc. May 14, 20125
objective
• Based on free-form deformation
tool coupled with various
optimization methods
Mesh Morphing
Applies a geometric design change directly to the mesh in the solver
Uses a Bernstein polynomial-based morphing scheme
• Freeform mesh deformation defined on a matrix of control points leads to a
smooth deformation
• Works on all mesh types (Tet/Prism, CutCell, HexaCore, Polyhedral)
User prescribes the scale and direction of deformations to control
© 2011 ANSYS, Inc. May 14, 20126
User prescribes the scale and direction of deformations to control
points distributed evenly through the rectilinear region.
Examples
Some Basic examples…
© 2011 ANSYS, Inc. May 14, 20127
Region DefinedBaselineModified
Process
ORWhat if? Optimizer
Setup CaseSetup Case
RunRun
Setup Setup RegionsRegions
Setup CaseSetup Case
RunRun
Setup Setup
© 2011 ANSYS, Inc. May 14, 20128
Setup
Morph
Setup
Morph
EvaluateEvaluate
Choose
“best” design
Choose
“best” design
ParametersParameters
DeformationDeformation
Setup
Optimizer
Setup
Optimizer
OptimizeOptimize
Optimal
Solution
Optimal
Solution
MorphMorph
OptimizerOptimizer Auto
Objective Function
© 2011 ANSYS, Inc. May 14, 20129
Baseline Design Optimized Design
• Objective Function: Equal flow rate• Objective Function: Equal flow rate
Example – Simple Sedan
Sequential TabsSequential Tabs
© 2011 ANSYS, Inc. May 14, 201210
• Define Control Region(s)• Define Control Region(s)
Deformation Definition
Define constraint(s) (if any)Define constraint(s) (if any)
© 2011 ANSYS, Inc. May 14, 201211
• Define constraint(s) (if any)
• Select control points and
prescribe the relative ranges of
motion
• Define constraint(s) (if any)
• Select control points and
prescribe the relative ranges of
motion
Optimizer Algorithms; Compass, Powell,
Rosenbrock, Simplex, Torczon
Algorithms; Compass, Powell,
Rosenbrock, Simplex, Torczon
Auto
© 2011 ANSYS, Inc. May 14, 201212
• Optimize!• Optimize!
Results
Incompressible turbulent flow
Objective Function; Minimize Drag
Baseline Design Optimized Design
© 2011 ANSYS, Inc. May 14, 201213
L-Shape Duct
© 2011 ANSYS, Inc. May 14, 201214
Application: L-shaped duct
Objective Function:
Uniform flow at the outlet
Significant
Improvement in
Flow Uniformity
Generic Mirror Drag Optimization
Drag
Optimization
© 2011 ANSYS, Inc. May 14, 201215
~10%
Initial Value
Final Value
Generic Mirror Optimization
© 2011 ANSYS, Inc. May 14, 201216
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