Explanipedia

Gas pulsation-assisted fluidization of cohesive micron powder: An X-ray imaging study Open

Kaiqiao Wu, Rens Kamphorst, P. Christian van der Sande, Evert C. Wagner, Gabrie M.H. Meesters , et al. · 2025

On the inherent correlation between the fluidization and flow properties of cohesive powders Open

P. Christian van der Sande, Kaiqiao Wu, Rens Kamphorst, Evert C. Wagner, Gabrie M.H. Meesters , et al. · 2024

In this study, we investigate the correlation between fluidization behavior and flow properties of 10 commercially available cohesive powders through fluidization and rotating drum experiments. The rotating drum was operated at high speeds…

Flow behavior of polypropylene reactor powder in horizontal stirred bed reactors characterized by X-ray imaging Open

P. Christian van der Sande, C. de Vries, Evert C. Wagner, Amarenske C. Vögtlander, Gabrie M.H. Meesters , et al. · 2024

Fluidization behavior of stirred gas–solid fluidized beds: A combined X-ray and CFD–DEM–IBM study Open

P. Christian van der Sande, M.J.A. de Munck, Kaiqiao Wu, D.R. Rieder, D.E.A. van den Eertwegh , et al. · 2024

Stirred gas–solid fluidized bed reactors are commercially employed in polyolefin manufacturing, but the complex gas–solid contacting dynamics pose challenges in design, scale-up, and operation. In this study, the influence of agitation on …

Stirrer design for improving fluidization of cohesive powder: A time-resolved X-ray study Open

Kaiqiao Wu, Rens Kamphorst, Anna Bakker, Jasper Ford, Evert C. Wagner , et al. · 2024

Particle dynamics in horizontal stirred bed reactors characterized by single-photon emission radioactive particle tracking Open

P. Christian van der Sande, Evert C. Wagner, Jack de Mooij, Gabrie M.H. Meesters, J. Ruud van Ommen · 2024

Pressure-Pulsed Flow Triples Mass Transport in Aqueous CO2 Electrolysis Open

Jorrit Bleeker, Sue S.J. van Deursen, Lisanne C. Bakker, T. J. J. M. van Overveld, Katie M.R. Lawrence , et al. · 2024

X-ray tomography for fully-3D time-resolved reconstruction of bubbling fluidized beds Open

Adriaan Graas, Evert C. Wagner, Tristan van Leeuwen, J. Ruud van Ommen, Kees Joost Batenburg , et al. · 2023

Single-photon emission radioactive particle tracking method for hydrodynamic evaluation of multi-phase flows Open

P. Christian van der Sande, Jack de Mooij, Evert C. Wagner, Gabrie M.H. Meesters, J. Ruud van Ommen · 2023

Evaluation of the hydrodynamics of opaque multi-phase flows remains a challenging task, with implications for various industrial processes such as chemical processing, pharmaceutical, and mineral processing. Understanding how design and op…

The Mechanism behind Vibration Assisted Fluidization of Cohesive Micro-Silica Open

Rens Kamphorst, P. Christian van der Sande, Kaiqiao Wu, Evert C. Wagner, M. Kristen David , et al. · 2023

Vibro-assisted fluidization of cohesive micro-silica has been studied by means of X-ray imaging, pressure drop measurements, and off-line determination of the agglomerate size. Pressure drop and bed height development could be explained by…

Time-resolved X-ray study of assisted fluidization of cohesive micron powder: On the role of mechanical vibration Open

Kaiqiao Wu, Evert C. Wagner, Olga Ochkin-Koenig, Miika Franck, Dominik Weis , et al. · 2023

Mechanical vibration has been broadly used to assist fluidization of cohesive powders, because of its capability to disrupt gas channels and agglomerates. However, the improvement reported in literature is mostly deduced from bulk response…

Particle Dynamics in Horizontal Stirred Bed Reactors Characterized by Single-Photon Emission Radioactive Particle Tracking Open

P. Christian van der Sande, Evert C. Wagner, Jack de Mooij, Gabrie M.H. Meesters, J. Ruud van Ommen · 2023

Fluidization of spherical versus elongated particles - experimental investigation using X-ray tomography Open

Ivan Mema, Evert C. Wagner, J. Ruud van Ommen, Johan T. Padding · 2020

Void fraction measurements in partial cavitation regimes by X-ray computed tomography Open

Saad Jahangir, Evert C. Wagner, R.F. Mudde, Christian Poelma · 2019

Electrolyte effects on recirculating dense bubbly flow: An experimental study using X‐ray imaging Open

Manas M. Mandalahalli, Evert C. Wagner, Luís M. Portela, R.F. Mudde · 2019

In this work, the effect of an electrolyte (up to 2 M of NaCl dissolved in water) on a homogeneous dense bubbly flow, in an airlift bubble column, is studied using nonintrusive techniques. X‐ray and high‐speed imaging are used to investiga…

Fluidization dynamics of cohesive Geldart B particles. Part I: X-ray tomography analysis Open

Jiliang Ma, J. Ruud van Ommen, Daoyin Liu, R.F. Mudde, Xiaoping Chen , et al. · 2018

Generation and evaluation of an artificial optical signal based on X-ray measurements for bubble characterization in fluidized beds with vertical internals Open

Frank Schillinger, Tilman J. Schildhauer, Simon Maurer, Evert C. Wagner, R.F. Mudde , et al. · 2018

X-ray Computed Tomography of Cavitating Flow in a Converging-Diverging Nozzle Open

Saad Jahangir, Evert C. Wagner, R.F. Mudde, Christian Poelma · 2018

Cavitation is a complex multiphase phenomenon, where the production of vapor bubbles leads to opaqueness of the flow. While it is nearly impossible to visualize the interior of the cavitation region with visible light, we show that with X-…

On the hydrodynamics of membrane assisted fluidized bed reactors using X-ray analysis Open

Arash Helmi, Evert C. Wagner, Fausto Gallucci, M. van Sint Annaland, J. Ruud van Ommen , et al. · 2017

The application of membrane assisted fluidized bed reactors for distributed energy production has generated considerable research interest during the past few years. It is widely accepted that, due to better heat and mass transfer characte…

Characterization of TiO 2 nanoparticles fluidization using X-ray imaging and pressure signals Open

Jesús Gómez-Hernández, S. Sánchez-Delgado, Evert C. Wagner, R.F. Mudde, J. Ruud van Ommen · 2016

A fast reconstruction algorithm for time-resolved X-ray tomography in bubbling fluidized beds Open

Jesús Gómez-Hernández, J. Ruud van Ommen, Evert C. Wagner, R.F. Mudde · 2015

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