This study aims to leverage multiple Siemens PLM solutions in order to allow you to cover your entire design workflow, from design variants to automated post-processing of results. HEEDS, Siemens PLM’s industry-leading process integration and design optimization (PIDO) tool, was used in order to automate the modification of a parametric CAD geometry in STAR-CCM+. It was then used in order to very simply set-up a workflow involving a 1D/3D CFD coupling between Simcenter Amesim and STAR-CCM+. This co-simulation produced results which were automatically post-processed from HEEDS: 1D plots traced directly in HEEDS, and post-processing scenes created in STAR-CCM+ were automatically populated and collected in HEEDS. This approach allows you to automate the creation, simulation and post-processing of your design configuration sets while minimizing friction and required effort on your part. For more information, please visit our website: siemens.com/plm/simcenter

1. Automating 1D/3D CFD
analysis workflows
Speeding up design space exploration of a Y-junction
with Simcenter Amesim, STAR-CCM+ and HEEDS
Realize innovation.Unrestricted © Siemens AG 2018

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Agenda
• Introduction to the product portfolio
• Motivation for the automated
Y-junction co-simulation
• Set-up the Simcenter Amesim model
• Set-up the STAR-CCM+ model
• Set-up the HEEDS automation process
• Results of the HEEDS analysis
• Going further

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Cloud
Licensing
flexibility
Simcenter™ Portfolio for Predictive Engineering Analytics
Cornerstones for a future-proof engineering approach
Covering full range of
methods
Analytics, reporting &
exploration
Deployment flexibility
Openness &
Scalability
User experience
Industry &
engineering expertise
Systems approach
Collaboration &
workflow
Multidiscipline
& multiphysics
R
F
L
P
Controls
1D
3D
TEST
CFD

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Simcenter™ Portfolio for Predictive Engineering Analytics
Simcenter System Simulation Solutions
Simcenter Amesim
Collaboration &
workflow

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Simcenter™ Portfolio for Predictive Engineering Analytics
STAR-CCM+
STAR-CCM+

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Simcenter™ Portfolio for Predictive Engineering Analytics
HEEDS – Multidisciplinary design space exploration
HEEDS

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Agenda
• Introduction to the product portfolio
• Motivation for the automated
Y-junction co-simulation
• Set-up the Simcenter Amesim model
• Set-up the STAR-CCM+ model
• Set-up the HEEDS automation process
• Results of the HEEDS analysis
• Going further

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Page 8 Siemens PLM Software
Automated Y-junction co-simulation
The Y-junction is actually a complex component that
sometimes needs refinement for pressure drops or flow
rate distribution computations in the branches. 3D CFD
co-simulation can be used to complements the 1D system
simulation approach in Simcenter Amesim.
The goal is to generate lookup tables for variations in
pressure drop P or flow coefficient Cq with the Y-angle.
Performance variations can be explored manually, or we
can leverage process automation to improve time
efficiency.
Y-junction
Motivation
Simcenter Amesim

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HEEDS for process automation
HEEDS drives both Simcenter Amesim and STAR-CCM+ to
automate the co-simulation.
Aim: determine influence of  angle of the Y-junction over
unsteady fluid flow rate in the Y-junction pipe
Parameter variation : angle of Y-junction, 15° ≤ 𝛼 ≤ 180°
in steps of 15° (i.e. 12 designs in total)
Variable studied : pressure drop P at t = 1s, with the fluid
flow Q [L/min] imposed
Geometry of Y-junction
Evolution of inlet flow rate
HEEDS automates and expedites the design
space exploration process via streamlined
interfaces to directly interact with Simcenter
Amesim and STAR-CCM+ simulation models
Outlet 2
Outlet 3
Inlet 1
𝛼

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Insight & Discovery
Building knowledge of high performing designs
1 1 1 1 2 2 2 2
12
Mass Flow (kg/s)
Power(kW)
0
10
20
30
40
50
0 5 10 15 20
Industrial Duct Fan Design
Baseline Design
Best Designs (Lowest Power) at Each Mass Flow Rate
Multi-objective Pareto SearchSingle-objective Constrained Search
Efficient Search
Finding better designs, faster
Mass Flow (kg/s)
Power(kW)
0
10
20
30
40
50
0 5 10 15 20
Industrial Duct Fan Design
Baseline Design
Best Designs (Lowest Power) at Each Mass Flow Rate
Multi-objective Pareto Search
Cloud computing
Linux cluster
CAD or 1D Tools
FEA or MBD Simulations
Linux
workstation
Windows
workstation
CFD or Crash Simulations
Multiple
nodes and
multiple
cores per
node
Distributed Execution
Using your available compute resources to accelerate testing
Process Automation
Simplifying the virtual prototype build process
Automate Virtual Prototyping and Find Better Designs
Discover Better Designs, Faster!
Innovative Products and Technologies
HEEDS
Multidisciplinary Design Exploration Platform
CAD Portals
Geometry Exchange
CAE Portals
Simulation Tasks
Python
Scripting
VCollab
Visualization
Automate Virtual Prototyping and Find Better Designs
Process
Automation
ASSESSEXPLORETESTBUILD
Insight
& Discovery
Distributed
Execution
Efficient
Search
Aircraft Static Air Mixer Design
HEEDS

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Capabilities of interest for this automated Y-junction project
Automatic
execution
Process
automation
Streamline
workflows
Leaves
time for
other tasks
Intuitive
to use
Boosts
productivity
• Automate a repetitive task
• No user intervention
• Automatic design changes
• Less error-prone
• Larger adoption across
company

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Process managed by HEEDS
Workflow managed by
HEEDS in combination
with Simcenter Amesim
and STAR-CCM+
Change parametric
CAD in STAR-CCM+
Mesh STAR-CCM+
model
Execute Simcenter
Amesim/STAR-CCM+
co-simulation
Store 1D/CFD co-
simulation results
Outlet 2
Outlet 3
Inlet 1
𝛼
List of  angle
parameters

angles
All results




HEEDS POST
N
Tasks are
looped N times,
automatically

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Agenda
• Introduction to the product portfolio
• Motivation for the automated
Y-junction co-simulation
• Set-up the Simcenter Amesim model
• Set-up the STAR-CCM+ model
• Set-up the HEEDS automation process
• Results of the HEEDS analysis
• Going further

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1D model setup within Simcenter Amesim
Simcenter Amesim sketch for providing boundary conditions
Initial tasks include running the 1D & 3D
models separately, then the co-simulation
setup, meshing and a test run
Flow boundaries for each branch of a
junction :
• volumetric flow rate at the inlet
• pressure sources at the two outlets
Simcenter Amesim
Flow field inside the junction:
• definition of the geometry
• pressure at the inlet
• mass flow rate at the outlets
• isothermal case in this case
STAR-CCM+
• The simulation is run across the two solvers which are
strongly coupled

15. Unrestricted © Siemens AG 2018
Page 15 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivation for the automated
Y-junction co-simulation
• Set-up the Simcenter Amesim model
• Set-up the STAR-CCM+ model
• Set-up the HEEDS automation process
• Results of the HEEDS analysis
• Going further

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3D CFD model setup within STAR-CCM+
STAR-CCM+ CAD modeler to create the
Y-junction CAD
Mesh of the Y-junction
• Parameterization of the angle using STAR-CCM+ CAD
modeler
• Only ½ of the pipe considered
CAD
• Mesh : 3D polyhedral + prism layers
• Pipeline workflow in STAR-CCM+ ensures automatic
re-meshing in case of any change in geometry
Mesh
• Implicit unsteady
• 𝑘 − 𝜖 turbulence model
• Segregated solver
Numerical model

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Page 17 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivation for the automated
Y-junction co-simulation
• Set-up the Simcenter Amesim model
• Set-up the STAR-CCM+ model
• Set-up the HEEDS automation process
• Results of the HEEDS analysis
• Going further

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HEEDS automation process for  angle variation of Y-junction
Define processes…
vertical
process
STAR-CCM+
Including a model is as
simple as a drag and drop
Simcenter Amesim

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HEEDS automation process for  angle variation of Y-junction
Define parameters and tags…
Simcenter Amesim
Parameter Tag type File / Input type Type Value
Pressure at
outlet
Variable LMS Amesim Constant 0 Pa
Positive half
angle
Variable STAR-CCM+
design parameter
Continuous 15° ≤ 𝛼 ≤ 180°
resolution = 12
Negative half
angle
Variable STAR-CCM+
design parameter
Dependent −1
× 𝐻𝑎𝑙𝑓 𝐴𝑛𝑔𝑙𝑒
Mass flow
rate at inlet
Response LMS Amesim (Last
Value)
Tag ----
Pressure
drop
Response STAR-CCM+
Report
Tag ----
HEEDS
STAR-CCM+

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HEEDS automation process for  angle variation of Y-junction
Define study
• Study type: evaluation only
• Define cases in a single design set
• Click run
HEEDS

21. Unrestricted © Siemens AG 2018
Page 21 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivation for the automated
Y-junction co-simulation
• Set-up the Simcenter Amesim model
• Set-up the STAR-CCM+ model
• Set-up the HEEDS automation process
• Results of the HEEDS analysis
• Going further

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Result of the HEEDS analysis
HEEDS takes care of all
changes in the models and
executes the co-simulations
HEEDS captures all the
STAR-CCM+ scenes and
plots. The user saves time
and can perform other tasks
HEEDS POST
Correlation plot

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Results for 4 angles of Y-junction
𝛼 = 30° 𝛼 = 75°
𝛼 = 120° 𝛼 = 180°
• Easy workflow and
straightforward integration
of the models
• Exploring the design space
is just a few clicks away!
• Minimal user intervention
required
• Easy trade-off
investigations
• Higher productivity
Velocity vectors for 4 Y-junction angles (different color scales)

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Result of HEEDS analysis
HEEDS allows users to draw
multiple plots in a view
The plots can be synced
enabling users to gain
greater insight
HEEDS POST
HEEDS plot view capability

25. Unrestricted © Siemens AG 2018
Page 25 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivation for the automated
Y-junction co-simulation
• Set-up the Simcenter Amesim model
• Set-up the STAR-CCM+ model
• Set-up the HEEDS automation process
• Results of the HEEDS analysis
• Going further

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Help documentation in HEEDS
HEEDS Getting Started Guide

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HEEDS-Simcenter Amesim training
HEEDS-Simcenter Amesim tutorials based on applications

28. Realize innovation.
Karim NASSAR
Stéphane NEYRAT
Simcenter Amesim Platform
Jean-Pierre ROUX
Ian HOGG
HEEDS
Siemens PLM / Simulation & Test Solutions Department