DigAnaRS releases DARS v2.08: Cutting-edge Chemistry Simulation for Advanced Combustion Engineering

London and New York, February 7, 2012

DigAnaRS is pleased to announce the launch of DARS v2.08, the latest release in the DARS family of advanced simulation tools for the analysis of complex chemical reactions. The new release includes novel models and provides improved predictive capabilities and further reduced simulation times (25 times faster for the spark ignition engine and 3 times faster for the directly injected compression ignition engine).

“Further development in parallelization, load balancing, and particle clustering makes DARS an even faster and more efficient tool for the analysis of all kind of reactive flows” says Fabian Mauss, President and Founder of DigAnaRS. “The CPU time needed for an engine cycle simulation with DARS SRM model with 100 particles is today at 5 seconds. This allows for efficient model parameter optimization, when using reduced reaction mechanisms.”

DARS v2.08 further builds upon its 1-D simulation capabilities that can be used to model reactor-networks such as exhaust systems. Combined with the predictive reactor and engine models, DARS v2.08 also delivers closer processes optimization. Kinetic mapping gives users insight into the effect of changing the composition of a fuel - for instance by adding biofuel - influences process efficiency and emissions. Available now for download, DARS will be officially launched at the dedicated DARS Workshop that will form part of the STAR Global Conference 2012 (March 19-21, 2012, The Netherlands).

Extra NO found in the emissions of a directly injected CI engine due to change in fuels (toluene added in n-heptane)

New models:

• Transient Stochastic Pipe

With the addition of this model, users can simulate burnt gas behavior in the exhaust manifold or piping, and investigate post-combustion conditions of exhaust gas mixture.

Potential application of the new pipe model areas:

• Conditions for igniting unburned hydrocarbons in the exhaust piping
• Inlet conditions for catalysts
• After-treatment in automotive and power generation engineering
• Combustion applications in chemical, environment and heavy industries.

Possibility of integrated powertrain after-treatment investigations (DARS 1D SRM models for cylinder, pipe and catalyst)

• Predictive flame propagation model for spark ignition engine simulation

This model replaces or complements the Wiebe function for burning speed with predictive capabilities. The approach takes into account 3D geometry of the cylinder, the turbulence level and the laminar flame speed of the fuel. Application areas encompass engine knock investigations.

Additional features for the Flame calculations

• Improved calculation capability with cold start option

Calculations speedup and solver convergence

• Particle Clustering technique

The clustering is based on proximity in phase space. The method enables a reduction in the number of individual calculations per particles and therefore a significant speed-up, while still maintaining of the accuracy of detailed chemistry.

• Improved convergence for very stiff chemical mechanisms

DARS – Reacts for You!

Try it out today!

For information on all new features in DARS v2.08 please visit https://support.cd-adapco.com> or www.loge.se>. You can also contact us at info@diganars.com.