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DARS - Advanced Chemistry Simulation
Posted Mon March 28, 2011 @11:07AM
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News DigAnaRS is pleased to announce the launching of DARS v2.06, the latest release of their advanced simulation tool for the analysis of complex chemical reactions.

The latest version includes an improved user interface, significantly reduced simulation times and improved predictive capabilities.


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“From the very beginning our intention was to make DARS the easiest and most accessible simulation tool for understanding and optimizing devices that feature complex chemical reactions. With the release of DARS v2.06, we have finally realized that ambition” says Fabian Mauss, President and Founder of DigAnaRS. “DARS v2.06 provides users from the automotive, energy and chemical industries with an intuitive and flexible analytic toolkit required to develop more environmentally considerate products in less time than ever before.”

DARS v2.06 sets new standards for modeling catalytic converters, including particulate filters. Combined with the predictive reactor and engine models, DARS v2.06 also enables the optimization of processes. Kinetic mapping gives users insight into how process parameters influence process efficiency and emission. DARS provides you the tools that explain your results to your colleagues.

DARS 2.06 will be officially launched at the STAR European Conference 2011, which will include presentations and demonstrations that explore all of the new features.

New transient 1D models:

  • Catalyst model

    With the addition of a new catalytic converter model, users can simulate surface and gas phase catalyst behavior, allowing for both detailed and global surface chemical kinetics. The new model includes:

    • Representative 1D transient channel model, with heat conduction throughout catalyst.
    • Heat and mass transfer between gas and surface.
    • Temperature ramp and variable inlet gas composition

    Potential application areas:

    • Three way- (TWC), NOx storage- (NSC) and Diesel oxidation Catalysts (DOC)
    • After-treatment in automotive and power generation engineering
    • Combustion applications in chemical, environment and heavy industries.
  • Diesel particulate filter (DPF) model

    A newly developed DPF model allows the simulation of soot removal processes in a dedicated diesel PM filter. The new model includes:

    • Representative 1D transient channel model, with heat conduction throughout particulate filter
    • Soot deposition and oxidation, soot cake growth
    • User defined global catalytic chemistry.

    Potential application areas:

    • After-treatment in automotive and power generation engineering
    • Combustion applications in chemical, environment and heavy industries.
  • Stochastic 1-D models for: pipes, intercoolers and PSRs (perfectly stirred reactors)

    These standalone transient models complete the 1-D reactor network models available in DARS and enable the analysis of full plants and power trains.

Additional features for the Stochastic Engine Models

A new flame propagation model has been developed for the SRM (stochastic reactor model) SI engine. Soot is now supported for all engine models. The latest version DARS v2.06 couples with 1-D engine simulation tools and now supports GT-Power 7. Potential application areas are Internal Combustion Engines: combustion investigations, knock conditions, efficiency / performance, emission formation conditions.

Updates in the Graphical User Interface

  • A valve model for the DICI SRM and a catalyst model are available now into DARS v2.06 GUI.
  • Scatter plots can be built for stochastic reactor models in order to illustrate for example species or temperature inhomogeneities within the reactor/ in-cylinder gas mixture.
  • Post processing adds different standard reactors (CV, CP, PSR)
  • Performance maps such as Φ-T diagrams can now be created with only a few clicks.
Calculations speedup and solver convergence
  • MPI Parallelization giving massive CPU time reduction for all chemistry in stochastic reactor models (DICI, SI, HCCI).
  • Optimization of RAM usage by 80% for large mechanisms.
  • Factor 2 speedup for 0D reactors.
  • Stiffness removal methodology significantly improves convergence for very stiff mechanisms.
  • Soot convergence improvement.
  • RAM memory usage optimized with 80% decrease for large mechanisms.
New DARS API for coupling to other CAE software

DARS v2.06 comes with available API for adiabatic constant volume & constant pressure reactors, (including soot), for the stochastic reactor engine models and for the catalyst model.

Try it out today!

For information on all new features in DARS v2.06 please visit CD-adapco’s user services site or LOGE’s website.

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