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Copyright © ESI Group, 2017. All rights reserved.Copyright © ESI Group, 2017. All rights reserved.
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SCILAB WORKSHOP
Workflow automation
SCILAB TEAM
17th, October 2019
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Agenda
1. OpenFOAM case set-up with SCILABRead/Write text files
2. OpenFOAM simulation automation with SCILABRun utilities from SCILAB console
3. OpenFOAM results post-processing with SCILAB
4. Advanced post-processingOptimization example
5. Graphical User Interface (GUI) design for simulation application
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OpenFOAM case set-upRead/Write text files
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1. REMINDER: OpenFOAM case structure
System directory
Simulation parameters
Constant directory
Mesh and flow properties
Time directories
Initial conditions and results
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• Simple ‘ or double quote ’’
>> ‘Make simulation rocks!’
• Concatenate with +
>> ‘SCILAB’ + ‘ & ‘ + ‘OpenFOAM’
• Locate substring
strstr, find
• Handle part of strings
strsplit, strsubst
• String conversion into double
evstr
• Handle text file
mopen, mgetl, mfprintf, mclose, write
2. Basics for string manipulation in SCILAB
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3. Example: Speed and angle of attack change
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PARSEC parametrization
4. Example: Mesh change
Screening experiment
rle, xup, zte, bte
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4. Example: Mesh change
Header
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4. Example: Mesh change
Content
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4. Example: Mesh change
Generated file & mesh
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Simulation automationRun OpenFOAM utilities from SCILAB
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1. REMINDER: OpenFOAM utilities
Access utilities fromcommand line
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Windows, Linux or MacOScommand execution
unix_g, unix_s, unix_w, unix_x
2. Basics for utilities manipulation in SCILAB
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1. Clean case
2. Generate new mesh
3. Run simulation
3. Example: Generate cases for each run of DoE
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Results post-processingField and time serie analysis
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1. REMINDER: OpenFOAM results
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csvRead
• Range definition
• Automatic conversioninto doubles
• Header remove
evstr
String conversion intodouble matrix
2. Basics for results manipulation in SCILAB
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Advanced post-processingAirfoil shape optimization
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Airfoil shape optimization
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1. Optimization workflow
Parametrization
& Case setupSimulation Post Process Cost Function
Cost functions
• Maximize lift ~ min 10 − 𝐶𝐿• Minimize drag (CD) ~ min𝐶𝐷
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2. Optimization cost function
1/ Clean case
2/ Generate new mesh
3/ Run case
4/ Extract results
5/ Build cost function
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3. Optimization set-up
Genetic Algorithm – Multi-Objective optimization – 20 iterations
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4. Design space exploration – Toward optimum
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GUI designSimulation application
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Figure properties
Uicontrol main properties:
• Style
• Position
• Value
• Enable
• String
• Tag
• Callback
1. SCILAB function for GUI design – uicontrol()
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2. Locate case - GUI
Locate Case
Components
• 1 figure
• 1 menu
• 1 callback
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3. Locate case - Code
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4. Simulation & Optimization set-up - GUI
Simulation set-up
• Change Speed
• Change AoA
Optimization set-up
• Change max number of iteration
• Run optimization
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5. Simulation set-up code
Graphical component
Callback
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