Wire mesh tomography applied to trickle beds: A new way to study liquid maldistribution

Capacitance wire mesh imaging of bubbly flows for offshore treatment applications

“…Sweeping sequentially each individual transmitter wire allowed signal acquisition of all touchless cross-points over the entire column cross-section. More detailed descriptions on the wiremesh sensor functionalities and data processing can be found elsewhere [29][30][31].…”

Hydrodynamics of gas–liquid cocurrent downflow in floating packed beds

“…Such characteristic enables to build images of liquid volumetric distributions in the bed crosssections using as a contrasting property the difference between gas and liquid electrical permittivity values nearby the WMS cross-point voxels. More detailed information on WMS principle, functionalities and data processing can be found elsewhere (Da Silva et al, 2007;Llamas et al, 2008;Schubert et al, 2010b). In this work, a sampling frequency of 100 Hz was found enough to capture the entire frequency pass-band of the hydrodynamic phenomena of interest.…”

Applications of tomography in bubble column and trickle bed reactors

“…Alternatively, it is possible to devise portable CT systems that can achieve relatively high spatial resolution and full tomographic reconstructions, though these may have other restrictions regarding the size of the equipment on which they can be applied (Bieberle et al, 2013;Kim et al, 2012). Electrical tomography techniques have also proven beneficial for studying trickle bed reactors owing to the high time resolution that can be achieved (Bieberle et al, 2010;H€ afeli, Hutter, Damsohn, Prasser, & Rudolf von Rohr, 2013;Llamas et al, 2008;Matusiak, Jose, Hampel, & Romanowski, 2010;Reinecke & Mewes, 1997). Measurements of the conductivity require the conductive phase to be continuous, which is not often the case in a trickle bed.…”