More Related Content Similar to LMS Amesim/STAR-CCM+ co-simulation – Heat transfer in an internal combustion engine (20) More from Siemens PLM Software (6) LMS Amesim/STAR-CCM+ co-simulation – Heat transfer in an internal combustion engine1. Unrestricted © Siemens AG 2017
Page 1 Siemens PLM Software
LMS Amesim/STAR-CCM+
co-simulation
Heat transfer in an internal combustion engine
Unrestricted © Siemens AG 2017
2. Unrestricted © Siemens AG 2017
Page 2 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivations for this co-simulation
study
• Setup of the LMS Amesim model
• Setup of the STAR-CCM+ model
• Results of the LMS Amesim/STAR-
CCM+ co-simulation
• Going further
3. Unrestricted © Siemens AG 2017
Page 3 Siemens PLM Software
Simcenter™ Portfolio for Predictive Engineering Analytics
LMS Imagine.Lab
LMS Imagine.Lab Amesim
LMS
Imagine.Lab
System
Synthesis
4. Unrestricted © Siemens AG 2017
Page 4 Siemens PLM Software
Simcenter™ Portfolio for Predictive Engineering Analytics
STAR-CCM+
STAR-CCM+
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Page 5 Siemens PLM Software
Simcenter™ Portfolio for Predictive Engineering Analytics
Cornerstones for a future-proof engineering approach
Cloud
Licensing
flexibility
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
6. Unrestricted © Siemens AG 2017
Page 6 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivations for this co-simulation
study
• Setup of the LMS Amesim model
• Setup of the STAR-CCM+ model
• Results of the LMS Amesim/STAR-
CCM+ co-simulation
• Going further
7. Unrestricted © Siemens AG 2017
Page 7 Siemens PLM Software
Motivations for co-simulation
Engine cylinder head
Thermal reliability verification is carried out late in the development
process but is important for :
• cooling system definitions
• thermal stress calculations
• under-hood layout strategies
Cool but not overcool!
• overcooling reduces efficiency and increases emissions
• A valued approach improving both 1D and 3D CFD results
• Modelling of system interactions
• Realistic boundary conditions
• Possibility for multiple design iterations
Pain points:
Solution: co-simulation
8. Unrestricted © Siemens AG 2017
Page 8 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivations for this co-simulation
study
• Setup of the LMS Amesim model
• Setup of the STAR-CCM+ model
• Results of the LMS Amesim/STAR-
CCM+ co-simulation
• Going further
9. Unrestricted © Siemens AG 2017
Page 9 Siemens PLM Software
LMS Amesim model for vehicle energy management (VEM)
Engine thermal management
Fuel economy and performance
Passenger comfort
Vehicle integration analysis
Cooling system analysis
LMS Amesim is a world leading platform for
physical simulation of mechatronics systems
10. Unrestricted © Siemens AG 2017
Page 10 Siemens PLM Software
Parts of an internal combustion (IC) engine
Engine
block
External
block
+
Lower
block
Internal
block
GasketIntake side
+
Exhaust side
Camshaft
Cylinder
head
11. Unrestricted © Siemens AG 2017
Page 11 Siemens PLM Software
LMS Amesim diagram of the IC engine thermal model
Thermal model of engine
Represents engine combustion and friction,
engine thermal mass, heat exchange with
underhood, water-jacket and oil-lubrication
system.
Representation of engine thermal masses
Engine split into thermal lumped masses:
• Engine block: inner block side, piston,
external block side, lower block
• Cylinder head: intake side, exhaust side,
cover with camshaft box
Engine thermal lumped masses (partial view)
Water
jacket
Intake
Camshaft + Engine cover
Exhaust
External
block
External
block
Lower block
Internal
block
Oil
cooler
Air
Combustion
chamber
12. Unrestricted © Siemens AG 2017
Page 12 Siemens PLM Software
Co-simulation model
Water
jacket
Air
Camshaft + Engine cover
External
block
External
block
Lower block
Oil
cooler
Star-CCM +
3D
model
Internal block, piston, exhaust and intake sides
are simulated in STAR-CCM+.
Transverse view below, see next slides for full 3D perspective.
LMS Amesim model for co-simulation STAR-CCM+ model
13. Unrestricted © Siemens AG 2017
Page 13 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivations for this co-simulation
study
• Setup of the LMS Amesim model
• Setup of the STAR-CCM+ model
• Results of the LMS Amesim/STAR-
CCM+ co-simulation
• Going further
14. Unrestricted © Siemens AG 2017
Page 14 Siemens PLM Software
• Based on an existing CAD model
• CAD cleaning and surface repair in
STAR-CCM+
STAR-CCM+ model
CAD
• 3D polyhedral unstructured mesh
• ≈100k cells for co-simulation case
Mesh
• Thermal properties extracted from LMS
Amesim model
• Segregated solid energy model
Physics
Exploded view of the CAD
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Page 15 Siemens PLM Software
STAR-CCM+ mesh
Mesh generated for the engine and piston
16. Unrestricted © Siemens AG 2017
Page 16 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivations for this co-simulation
study
• Setup of the LMS Amesim model
• Setup of the STAR-CCM+ model
• Results of the LMS Amesim/STAR-
CCM+ co-simulation
• Going further
17. Unrestricted © Siemens AG 2017
Page 17 Siemens PLM Software
Co-simulation model
Part in STAR-CCM+
Connected part in
LMS Amesim
Type
Internal block
External block 1
Water jacket 3
Lower block 2
Combustion gases 1
Intake side
External block 2
Water jacket 3
Camshaft 2
Air 3
Exhaust side
External block 2
Water jacket 3
Cam shaft 2
Air 3
Exhaust gases 1
Piston
Lower block 1
Combustion gases 1
Combustion chamber Combustion gases 1
Three types of inputs/outputs exchanged :
Type
name
Variable computed
by LMS Amesim
Variable computed
by STAR-CCM+
Type 1 Heat transfer (𝑊) Temperature (°𝐶)
Type 2 Temperature (°𝐶) Heat transfer (𝑊)
Type 3
Coolant temperature (°𝐶)
Heat coefficient (𝑊/𝑚𝑚2
°𝐶)
Temperature (°C)
18. Unrestricted © Siemens AG 2017
Page 18 Siemens PLM Software
Co-simulation results
Unsteady simulation is done by following NEDC driving
cycle
Volume averaged temperature evolutions Temperature contours for the engine
19. Unrestricted © Siemens AG 2017
Page 19 Siemens PLM Software
Co-simulation results
Complete detailed thermal behavior during start-up
phase in the engine and its different interfaces:
temperature and heat exchange prediction
Using 1D models, LMS Amesim represents
complete dynamics of the system including:
• Coolant flow rate inside the water jacket
• Vehicle fuel economy and performance in
interaction with the gearbox and the alternator
• Possibility to carry out multiple design studies
and to optimize heat transfer and temperature
distribution
Temperature contours for the pistons
20. Unrestricted © Siemens AG 2017
Page 20 Siemens PLM Software
Co-simulation results
Co-simulation provides detailed 3D zoom on hot
parts of the engine
Temperature and heat transfer evolutions
for combustion chamber in LMS Amesim
Temperature contours for combustion chamber
21. Unrestricted © Siemens AG 2017
Page 21 Siemens PLM Software
Co-simulation results
Heat rejection into water jacket in LMS Amesim
Water jacket
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Page 22 Siemens PLM Software
Co-simulation results
Boundary heat flux across the cam interface
• Realistic boundary conditions
• Dynamic simulation
• Multi-physics model
Added value provided by
co-simulation
FMEP and fuel consumption evolutions in LMS Amesim
LMS Amesim STAR-CCM+
(*) FEMP: friction mean effective pressure
23. Unrestricted © Siemens AG 2017
Page 23 Siemens PLM Software
Agenda
• Introduction to the product portfolio
• Motivations for this co-simulation
study
• Setup of the LMS Amesim model
• Setup of the STAR-CCM+ model
• Results of the LMS Amesim/STAR-
CCM+ co-simulation
• Going further
24. Unrestricted © Siemens AG 2017
Page 24 Siemens PLM Software
STAR-CCM+/LMS Amesim co-simulation user guide in LMS
Amehelp
25. Unrestricted © Siemens AG 2017
Page 25 Siemens PLM Software
Systems-Driven Product Development
Predictive Engineering Analytics
Role in Systems-Driven Product Development
Predictive Engineering AnalyticsSystem Mockup
Managed in PLM Context - Multi-Domain Traceability, Change and Configuration
TEST
Digital
Twin
1D
CFD
Exploration - Analytics - Reporting
3D
26. Unrestricted © Siemens AG 2017
Page 26 Siemens PLM Software
3D SIMULATION
CFD SIMULATION
1D SIMULATION
From disconnected models and data …
Customer Usage data
Simulation data
Test data TEST MODELING
Historical data
CONTROLS
27. Unrestricted © Siemens AG 2017
Page 27 Siemens PLM Software
…to a performance Digital Twin
3D SIMULATION
CFD SIMULATION
1D SIMULATION
Customer Usage data
Simulation data
Test data TEST MODELING
Historical data
CONTROLS
28. Realize innovation.
Karim NASSAR
Stéphane NEYRAT
LMS Amesim Platform
Romain GONARD
LMS Amesim Powertrain Subsytems
Girish BHANDARI
STAR-CCM+
Siemens Industry Software S.A.S.
Digital Factory Division
Product Lifecycle Management
Simulation & Test Solutions
DF PL STS CAE 1D