A note on the modelling of lubrication forces in unresolved simulations

Journal article (2023)

Authors

Tim M.J. Nijssen BT/Bioprocess Engineering - AS
M. Ottens BT/Design and Engineering Education - AS
J.T. Padding Complex Fluid Processing - Mechanical, Maritime and Materials Engineering
Research Group
Complex Fluid Processing (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2023 Tim M.J. Nijssen, M. Ottens, J.T. Padding
DOI
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https://doi.org/10.1016/j.powtec.2022.118017
CFD-DEM Fluid–solid systems Lubrication force Multiphase modelling Unresolved simulations
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Published Date

2023

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Complex Fluid Processing

Abstract

Lubrication forces play a major role in the behaviour of fluid–solid systems, where they affect the collisions between particles. Current implementations of lubrication forces in unresolved simulations often suffer from shortcomings, such as neglecting parts of the physics or relying on arbitrarily defined parameters. In this short communication, we propose a novel implementation, rigorously defined based on physical and numerical factors. Both particle roughness and deformation are considered, and the model accuracy is demonstrated through comparison with experimental results.