Wspólnotowy Serwis Informacyjny Badan i Rozwoju - CORDIS

Software for Simulating Particle Deposition and Soot Burn off in Foam Filters

A user-friendly simulation package for analysis and design of Diesel exhaust gas after treatment systems has been developed. The software called DexaSIM consists of a graphical user interface (GUI), which provides to the user a simple and effective tool to quickly model and simulate an exhaust pipeline, in which the Open Source Computational Fluid Dynamics (CFD) flow solver OpenFoam and the Lattice-Boltzmann-Method (LBM) based solver PYCE, which was developed during the course of the STYFF-DEXA project, are embedded. DexaSIM is comfortable to use even for non-CFD experts.

DexaSIM contains all necessary elements for modelling the key components of Diesel exhaust systems, such as pipe systems, catalysts and particulate filters. Furthermore modules are provided to analyse porous material structures as can be found in catalysts and filters and to reconstruct three-dimensional computational models there from. New materials can be designed artificially based on statistical functions, which are used to characterise the porous structures. The detailed microscopic flow analysis of the material using the Lattice-Boltzmann-Method provides macroscopic quantities such as porosity and permeability for OpenFoam, which treats the porous material as a homogeneous flow region.

Furthermore models for soot deposition and filter regeneration are provided in DexaSIM. They have been partially extensively validated using experimental data of the other project partners. An acoustics module based on the solution of the wave equation completes the software portfolio. This can be run on the same computational models as used for OpenFoam and PYCE to analyse the acoustic characteristics of porous material.

The beta-release of DexaSIM is now under testing by the project partners. The feedback received so far is very positive. According to the opinion of all partners, DexaSIM today represents the most advanced and efficient software tool for performing research and development work on exhaust gas after treatment systems.

DexaSIM will be actively marketed and sold by an engine R&D center which distributes automotive software on a world-wide basis. Negotiations concerning this are currently in progress. An analysis of the passenger car Diesel market has shown that approximately 1000 potential prospects (licence sales) exist and that with an anticipated reachable market share of 30% total revenues of 6 Mio. Euro from licence sales and an annual turnover from maintenance business in the order of 1 Mio. Euro can be expected.

Besides the passenger car Diesel market with minor modifications DexaSIM can be used also for heavy duty and large Diesel engine exhaust gas after treatment systems. Furthermore, due to the more and more stringent exhaust gas regulations of gasoline engines, potential for DexaSIM is also seen in this field. Other areas such as exhaust gas purification of power plants, waste incineration or chemical engineering plants could be addressed with DexaSIM in the mid-term future. As such the market potential of the software is enormous.

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Reported by

Christian-Doppler-Laboratory for Applied Computational Thermofluiddynamics
Franz-Josef-Straße 18
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