DARS v2.10 New Features & Enhancements

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1 DARS v2.10 New Features & Enhancements

2 Why DARS? Enabling detailed chemistry in your CAE simulations Take the right design choices, including chemical effects Faster and cheaper design cycles Evaluation of entirely new designs

3 What is DARS? Standalone software for 0D and 1D analyses of chemical reactions Chemistry analyses Mechanism reduction Idealized reactors Ignition delay time Emission production Flame speed calculations Library generation 1D & 0D PDF models for incylinder combustion and aftertreatment

4 Be More Competitive! Technology Experience Productivity New Modeling Capabilities Advanced Technologies Confidence with Results Technology Accessible Engineering Time Simulation Workflows Faster Simulations More Designs Explored Increased Efficiency

5 DARS v2.10 Major New Features Technology Experience Productivity IDT ECFM-3Z single/dual fuel libraries ECFM-CleH single/dual fuel libraries FGM libraries PVM-MF single/dual fuel libraries Soot libraries Streamlined workflow from DARS to STAR-CCM+ TM / STAR-CD TM New GUI module for library generation Context sensitive library generation Parallelization of library calculations Scripting/command line functionality Compact libraries

6 DARS v2.10 Major New Features Technology IDT Technology ECFM-3Z single/dual fuel libraries ECFM-CleH single/dual fuel libraries FGM libraries PVM-MF single/dual fuel libraries Soot libraries New Modeling Capabilities Advanced Technologies Confidence with Results

7 ECFM-3Z single/dual fuel libraries Explore new fuels and fuel compositions in your STAR-CD ECFM- 3Z calculations DARS can export ECFM-3Z TKI autoignition libraries Improve knock prediction through more realistic ignition delay times Predict knock for dual fuel engines DARS can create dual fuel ECFM-3Z TKI libraries Ignition delay times for n-heptane

8 ECFM-CleH single/dual fuel libraries Explore new fuels and fuel compositions in your STAR-CD ECFM- CleH calculations DARS can export ECFM-CleH libraries Improve knock prediction through more realistic ignition delay times Improve emission prediction Predict knock and emissions for dual fuel engines DARS can create dual fuel ECFM-CleH libraries CO equilibrium mass fraction as function of equivalence ratio and temperature

9 FGM libraries Simulate combustion accurately and fast DARS can now export FGM libraries for STAR-CCM+ For non-premixed and partially premixed combustion Explore combustion of any fuel/oxidant mixture Any CHEMKIN format chemistry can be used Improve species prediction Choose species for postprocessing in STAR-CCM+. Ignition process for n-heptane combustion at various equivalence ratios CO mass fraction during n-heptane combustion at various equivalence ratios

10 PVM-MF single/dual fuel libraries Explore new fuels and fuel compositions in your STAR-CD PVM-MF calculations DARS can export PVM-MF libraries Improve knock prediction through more realistic ignition delay times Improve emission prediction Predict knock and emissions for dual fuel engines DARS can create dual fuel PVM-MF libraries Ignition delay times for n-heptane Ignition process for n-heptane combustion at different equivalence ratios

11 Soot libraries Explore soot yield for new fuels and fuel blends DARS can export Soot source term libraries for the method of moments in STAR-CCM+ Soot source term libraries for the sectional method in STAR-CD DARS can export soot source term libraries for STAR-CCM+ for mechanisms with acetylene only Explore soot yield for new operating conditions Soot surface growth as function of mixture fraction for n-heptane combustion at various strain rates Soot oxidation by OH as function of mixture fraction for n-heptane combustion at various strain rates

12 DARS v2.10 Major New Features Technology Experience Streamlined workflow from DARS to STAR-CCM+ / STAR-CD New GUI module for library generation Context sensitive library generation Technology Accessible Engineering Time Simulation Workflows

13 Streamlined workflow from DARS to STAR-CCM+ / STAR-CD Set up a full library calculation in less than 10 minutes. Run the calculations Extract the library files and import them to STAR-CD / STAR-CCM+

14 New GUI module for library generation DARS includes a new module for library generation Easy to use for engineers with no previous experience in DARS Set up a full library calculation through ~20 actions No risk to forget to turn on the required output options for library export 14

15 Context sensitive library generation Tailor made library generator for each library type Only neccessary options are shown for each library Less risk for errors. ECFM Equilibrium requires only gas composition specification SSM library generation requires possibility to specify flame configuration since flamelets are used

16 DARS v2.10 Major New Features Productivity Parallelization of library calculations Scripting/command line functionality Compact libraries Faster Simulations More Designs Explored Increased Efficiency

17 Parallelization of library calculations Create libraries as fast as possible through efficient parallellization DARS now supports parallellization on local computer and clusters DARS GUI prepares all files required for the calculations Calculations can be executed directly from the GUI or from command line Selection of number of processors to use in GUI

18 Scripting/command line functionality Enhance your workflow through scripting Use the GUI to set up the calculation Export case folder and files DARS prepares all files for library generation DARS prepares a script for calculation of the library Execute calculations from command line Run on clusters Automate workflow through scripting ECFM-TKI library generation from command line

19 Compact libraries Libraries in binary format fast access minimal library size ASCII libraries exported additionally for verification of results Redesign of libraries for minimal size Compact EGR definition Only information crucial for STAR-CD / STAR-CCM+ is stored Soot library, ASCII file ECFM-Equilibrium library, ASCII file

20 In Conclusion IDT Accuracy Experience Productivity New Modeling Capabilities Advanced Technologies Confidence with Results Technology Accessible Engineering Time Simulation Workflows Faster Simulations More Designs Explored Increased Efficiency