Flow of newtonian/non-newtonian fluids in a bundle of tubes and in a packing of beads by MRI

Heinen, Claudia; Buggisch, Hans; Guthausen, Gisela

doi:10.1016/s0730-725x(03)00143-7

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…In the images a higher CSS represents a higher flow velocity multiplied with the spin density (see colour bar). At t = 0.5 h the flow velocity distribution is similar to the results obtained by Heinen et al (2003) for Newtonian fluids in random sphere packings. At t = 18 h the flow velocity distribution changed significantly.…”

Section: Image Analysissupporting

confidence: 82%

Monitoring the formation of an Aureobasidium pullulans biofilm in a bead-packed reactor via flow-weighted magnetic resonance imaging

et al. 2006

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The biofilm-forming fungus, Aureobasidium pullulans DSM 2404, was grown in a bead-packed reactor. Alterations within the reactor were analysed in several cross-sectional slices by magnetic resonance imaging (MRI) with flow contrast. For the first time, biofilm accumulation could be continuously elucidated without using any contrast agents, and the non-stationary flow through the fixed-bed reactor could be visualized. The results indicate that the non-stationary flow through the biofilm reactor changes significantly due to the changing reactor morphology. Preferential flow lines arise during biofilm formation. The accumulation of the biomass was determined and compared to gravimetrical biomass data. The described technique can be used to monitor hydrodynamic transport, and to combine flow-field characteristics with morphological data for the prediction of undesirable reactor processes, e.g. clogging.

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Section: Image Analysissupporting

confidence: 82%