Pfeiler was born in Leoben, Austria, in 1978. She received her M.Sc degree in Industrial J. Spijker was born in Bregenz, Austria, in 1984. He received his M.Sc degree in Industrial Raupenstrauch is professor of the Chair of Thermal Processing Technology a
Copyright © 2011 Praise Worthy Prize S.r.l. - All rights reserved International Review of Mechanical Engineering, Vol. 5, N. 2 Special Issue on Heat Transfer
225 have to be used to get similar results. Therefore, the
standard values in FLUENT of 2 for Phi and 1 for Theta should not be used for accurate predictions. The DO
model is more complex than the DTRM and usually needs more computation time. However, with
considering the fewer amount of rays for the DO model, the computation time is also shorter.
For industry, which is interested in the simulation of industrial kilns, the combination of the flamelet
combustion model, the DO radiation model and the realizable
k- ε model for turbulence with a modified
constant C
2
is an attractive fast and accurate method to predict the distribution of temperature and mean
concentrations. The prediction of NO
x
is not evaluated in this paper, but it is planned for further research, where
the slow formation rates and its sensitiveness to temperature have to be considered as well.
Acknowledgements
The research program of the Competence Center for Excellent Technologies in “Advanced Metallurgical and
Environmental Process Development” K1-MET has been financially supported within the Austrian
competence centre programme COMET Competence Center for Excellent Technologies by the Federal
Ministry of Economy, Family and Youth; by the Federal Ministry for Transport, Innovation and Technology; by
the provinces of Upper Austria, Styria and Tyrol, by the Styrian Business Promotion Agency and by the Tiroler
Zukunftsstiftung. The authors wish to express their appreciation to our project partners RHI AG, voestalpine
Stahl GmbH, Siemens-VAI and EBNER Industrieofenbau GmbH for their experiences and
financial support.
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Authors’ information
Chair of Thermal Processing Technology, Department Metallurgy, University of Leoben, Franz-Josef-Str. 18, 8700 Leoben, Austria.