Keywords :
Computational fluid dynamics; Discrete element method; Immersed boundary method; Lubrication force; CFD-DEM; Closest distance; DEM Simulation; Discrete elements method; High-accuracy; Hydrodynamic interaction; Immersed boundary methods; Lubrication effect; Lubrication forces; Mesh resolution; Chemical Engineering (all); General Chemical Engineering
Abstract :
[en] Although the CFD-DEM simulations could predict the long-range hydrodynamic interaction with high accuracy, they face difficulty in the close distance between particles because mesh resolution is not fine enough to capture the lubrication effects. As a remedy, we used a variant of Immersed Boundary method in our CFD solver to model a problem as a fully resolved simulation. Then, we developed a second-order boundary layer reconstruction approach to increase the accuracy of the immersed boundary method. Furthermore, for the first time and in the present work, we considered how shared cells between the particles need to be treated in the simulation of two approaching particles. Moreover, we investigated the relationship between mesh resolution and time step size on the accuracy of the calculated force. We found a specific range for this ratio to capture the correct short-range hydrodynamic interactions.
Funding text :
This research was funded by the Luxembourg National Research Fund (FNR) , grant reference ( INTER/DFG/20/14843353 - ConMicMac). For the purpose of open access, and in fulfilment of the obligations arising from the grant agreement, the author has applied a Creative Commons Attribution 4.0 International (CC BY 4.0) license to any Author Accepted Manuscript version arising from this submission. As a member of the XDEM group, we used the XDEM code as a DEM solver under the supervision of Professor Peters. We would like to acknowledge all previous colleagues who contributed to the XDEM code, its coupling interface, and immersed boundary method.
Commentary :
Since it is not an open-access article, we could not share it internally inside the university. I put the link to the article, which could be downloaded. https://www.sciencedirect.com/science/article/pii/S003259102300387X
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