Industrial solutions for creating CFD look-up tables

CFD look-up tables for complex chemistry form an integral part of advanced turbulent combustion models like FPI [1], FGM [2], ECFM-3Z [3], ECFM-CLEH [4], GFSD [5] etc. Dacolt can deliver both customised and turn-key software applications for the generation of CFD look-up tables.

In general terms, the use CFD look-up tables in such advanced combustion models is as follows:

• The combustion chemistry is pre-computed and relevant data is stored in a multi-dimensional database or look-up table
• This look-up table is read by the CFD code at the start of a simulation
• The combustion data is interpolated during the iterative calculation steps of the CFD solver

One of the key challenges is to integrate the generation of CFD look-up tables into the industrial CFD process. The following issues must be addressed:

• To create a look-up table, hundreds to tens of thousands individual chemistry simulations must be performed, requiring significant computing resource and data storage.
• An expert user is usually the only one able to use currently available tools to create CFD look-up tables, where substantial effort must be put in the set-up and post-processing of the individual chemistry simulations. A well-defined GUI is a key requirement to make these tools suitable for deployment in a multi-user industrial environment.
• The complexity of chemical reaction mechanisms is ever increasing, putting even more strain on the resources and tools required to pre-calculate the chemical reactions.

Dacolt has successfully created several software applications for generating CFD look-up tables for industrial customers, including PSA Peugeot Citroën, Renault and Air Liquide. These software applications can be installed and deployed on the customer site or can be hosted within the Web Services Framework of Dacolt.

Custom CFD look-up tables

For those customers who are not necessarily interested in generating the CFD look-up tables themselves, Dacolt can supply them with CFD look-up tables which may be specifically generated for their CFD purposes.

References

1. O. Gicquel, N. Darabiha, D. Thevenin, Proc. Combust. Inst. 28 (2000) 1901–1908.
2. J.A. van Oijen, F.A. Lammers, L.P.H. de Goey, Combust. Flame 127(3) (2001) 2124–2134.
3. O. Colin et al., Oil Gas Sci. Technol. 58 (1) (2003) 47–62.
4. G. Subramanian et al., SAE Technical Paper Series 2007-01-0154.
5. F.A. Tap and D. Veynante, Proc. Combust. Inst. 30 (2005) 919-926.

Contact us for more information on CFD look-up tables.