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Local lubrication model for spherical particles within incompressible Navier-Stokes flows
B Lambert1, L Weynans1, M Bergmann1
1Memphis Team, INRIA, F-33400 Talence, France.
This study introduces a new lubrication model for simulating particle suspensions, improving accuracy in fluid dynamics simulations by accounting for short-range hydrodynamic forces. The method enhances predictions for particle interactions without assuming particle shape.
Area of Science:
- Fluid Dynamics
- Computational Mechanics
- Particle Physics
Background:
- Lubrication forces are crucial for particle suspension dynamics.
- These forces are often underestimated in direct numerical simulations.
- Accurate modeling is essential for understanding particle-laden flows.
Purpose of the Study:
- To develop a novel lubrication model for coupled solvers.
- To accurately estimate unresolved hydrodynamic forces and torques.
- To improve simulations of incompressible Navier-Stokes flows with particles.
Main Methods:
- Coupling a volume penalization method with a discrete element method solver.
- Implementing local corrections on particle surfaces.
- Avoiding assumptions on global particle shape.
Main Results:
- The model accurately estimates hydrodynamic forces and torques.
- Corrections are applied locally, enhancing flexibility.
- Validated against experimental data, showing comparable performance to existing models.
Conclusions:
- The proposed model effectively captures lubrication forces in particle suspensions.
- It offers a more versatile approach than models limited to spherical particles.
- This advancement improves the fidelity of direct numerical simulations for complex particle flows.
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