A note on the modelling of lubrication forces in unresolved simulations
Tim M.J. Nijssen (TU Delft - BT/Bioprocess Engineering)
M Ottens (TU Delft - BT/Design and Engineering Education)
J. T. Padding (TU Delft - Complex Fluid Processing)
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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.
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