Bending and low-frequency vortex shedding of flexible cylinders in laminar shear flow

Open access via Wiley agreement The data that support the findings of this study are available from the corresponding author upon reasonable request.Peer reviewedPublisher PD

Liquid fluidization with cylindrical particles : highly resolved simulations

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Potential of microchannel flow for agglomerate breakage

Summary Direct simulations of solid-liquid flow in micro-channels have been performed. The solids phase consists of simple agglomerates, assembled from monosized, spherical particles. The simulations keep track of the flow-induced forces in the agglomerates. The effects of solids loading, channel geometry, and agglomerate type (doublets, triplets, and quadruplets) on the flow-induced forces has been investigated. By comparing these forces with agglomerate strength, we are able to assess the potential of microchannels as agglomerate breakage devices

Mixing in an agitated tubular reactor

Acknowledgement Sincere thanks to Andrew Bayly and Yi He (University of Leeds, UK) for bringing this flow system to my attention.Peer reviewedPostprin

Mesoscopic Methods in Engineering and Science

(First paragraph) Matter, conceptually classified into fluids and solids, can be completely described by the microscopic physics of its constituent atoms or molecules. However, for most engineering applications a macroscopic or continuum description has usually been sufficient, because of the large disparity between the spatial and temporal scales relevant to these applications and the scales of the underlying molecular dynamics. In this case, the microscopic physics merely determines material properties such as the viscosity of a fluid or the elastic constants of a solid. These material properties cannot be derived within the macroscopic framework, but the qualitative nature of the macroscopic dynamics is usually insensitive to the details of the underlying microscopic interactions

Detached Eddy Simulation on the Turbulent Flow in a Stirred Tank

A detached eddy simulation (DES), a large-eddy simulation (LES), and a k-ε-based Reynolds averaged Navier-Stokes (RANS) calculation on the single phase turbulent flow in a fully baffled stirred tank, agitated by a Rushton turbine is presented. The DES used here is based on the Spalart-Allmaras turbulence model solved on a grid containing about a million control volumes. The standard k-ε and LES were considered here for comparison purposes. Predictions of the impeller-angle-resolved and time-averaged turbulent flow have been evaluated and compared with data from laser doppler anemometry measurements. The effects of the turbulence model on the predictions of the mean velocity components and the turbulent kinetic energy are most pronounced in the (highly anisotropic) trailing vortex core region, with specifically DES performing well. The LES—that was performed on the same grid as the DES—appears to lack resolution in the boundary layers on the surface of the impeller. The findings suggest that DES provides a more accurate prediction of the features of the turbulent flows in a stirred tank compared with RANS-based models and at the same time alleviates resolution requirements of LES close to walls

Phase-field modeling of planar interface electrodeposition in lithium-metal batteries

Acknowledgments This work was supported by the Aberdeen-Curtin Alliance Scholarship. This publication was also made possible in part by the Professorial Chair in Computational Geoscience at Curtin University. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 777778 (MATHROCKS). The Curtin Corrosion Centre and the Curtin Institute for Computation kindly provide ongoing support.Peer reviewedPostprin

Lattice Boltzmann Phase Field Simulations of Droplet Slicing

ACKNOWLEDGEMENT This research was sponsored by Shanghai Sailing Program (No. 20YF1416000) and SUES Distinguished Overseas Professor Program.Peer reviewedPostprin

Lifting off a solid sphere from a flat bottom by laminar fluid flow

The financial support from the National Key R&D Program of China (2016YFB0302801), National Natural Science Foundation of China (No. 21676007), and the Fundamental Research Funds for the Central Universities (XK1802-1) are gratefully acknowledged.Peer reviewedPostprin

Zeta potential of a natural clayey sandstone saturated with carbonated NaCl solutions at supercritical CO2 conditions

The zeta potential is a measure of electric potential at the mineral-electrolyte interfaces. The zeta potential of natural sandstones depends on mineralogy, electrolyte pH, concentration, composition, amount of dissolved CO2, and temperature. We report for the first time the zeta potential measured on clayey sandstone comprising quartz, kaolinite, illite, albite and microcline saturated with NaCl solutions at supercritical CO2 conditions. Our results demonstrate that zeta potentials in clayey sandstone samples at supercritical CO2 conditions are significantly different from similar measurements conducted under ambient conditions and from those obtained with clean sandstones. Supercritical CO2 zeta potential remains negative but is influenced by clays and feldspars due to their significant presence and exposure to large pores, which yields less negative zeta potential compared to quartz, under identical conditions. Our results have significant implications to natural subsurface systems such as CO2 geo-sequestration sites, aquifers, geothermal sources and hydrocarbon reservoirs