Bubble size distribution modeling in stirred gas–liquid reactors with QMOM augmented by a new correction algorithm
作者： Miriam Petitti , Andrea Nasuti , Daniele L. Marchisio , Marco Vanni , Giancarlo Baldi
DOI: 10.1002/AIC.12003
关键词:
摘要: Local gas hold-up and bubbles size distributions have been modeled validated against experimental data in a stirred gas–liquid reactor, considering two different spargers. An Eulerian multifluid approach coupled with population balance model (PBM) has employed to describe the evolution of bubble distribution due break-up coalescence. The PBM solved by resorting quadrature method moments, implemented through user defined functions commercial computational fluid dynamics code Fluent v. 6.2. To overcome divergence issues caused moments corruption, numerical problems, correction scheme for implemented; simulation results prove that it plays crucial role stability accuracy overall approach. Very good agreements between simulations predictions are obtained, unique set coalescence kinetic constants, wide range operating conditions. © 2009 American Institute Chemical Engineers AIChE J, 2010
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