Reactor residence time analysis with CFD
Artikel i vetenskaplig tidskrift, 2006

Abstract: The residence time of the fluid in a reactor can be analysed with at least three different computational methods: (a) Eulerian simulation of the residence time measurements (b) solution of the Eulerian transport equation for residence time (c) Lagrangian particle tracking. Methods (a) and (c) are compared with analytical and experimental data from a pilot lagoon for validation, and the superiority of the Eulerian approach is demonstrated. Method (b), which has been validated in earlier studies, is applied to study the flow in the secondary combustion chamber of a biomass grate furnace. An inefficiently exploited zone of the furnace is identified, and a change in operating conditions, aimed at improving the reactor utilisation, is discussed.


secondary air injection

biomass combustion

pulse experiment

fluid age


Federico Ghirelli

Chalmers, Energi och miljö, Energiteknik

Sven Hermansson

Chalmers, Energi och miljö, Energiteknik

Henrik Thunman

Chalmers, Energi och miljö, Energiteknik

Bo G Leckner

Chalmers, Energi och miljö, Energiteknik

Progress in computational fluid dynamics

Vol. 6 4/5 241-247


Annan naturresursteknik

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