Modelling of pulverised coal combustion by a Eulerian-Eulerian two-phase flow formulation Online publication date: Tue, 17-May-2005
by A.C. Benim, B. Epple, B. Krohmer
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 5, No. 6, 2005
Abstract: This paper evaluates a Eulerian-Eulerian modelling of the dispersed two-phase flow in pulverised coal combustion. In contrast to the commonly employed Eulerian-Lagrangian procedures, which treat the gas phase by a Eulerian and the particulate phase by a Lagrangian frame of reference, the presently investigated approach applies a Eulerian description to both phases. In our implementation, the model is further simplified assuming a mechanical and thermal equilibrium between the phases. For validation, two- and three-dimensional furnaces with different thermal loads have been analysed. Results have been compared to those obtained by Eulerian-Lagrangian formulations and measurements. It has been shown that the present Eulerian-Eulerian approach provides a comparable overall accuracy to the Eulerian-Lagrangian formulation, with substantially lower CPU requirements for large-scale utility boilers, and, thus provides an attractive alternative for this bracket of problems.
Online publication date: Tue, 17-May-2005
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