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Lattice Boltzmann scheme for fluids with dynamic heterogeneities.
1Istituto Applicazioni Calcolo, CNR, Sezione di Bari, Via Amendola 122/D, 70126 Bari, Italy.
Summary
We present a new lattice Boltzmann model for simulating complex fluids. This method captures dynamic heterogeneities and offers faster computation than existing models.
Area of Science:
- Computational physics
- Fluid dynamics
- Mesoscopic modeling
Background:
- Strongly-interacting fluids exhibit complex behaviors like dynamic inhomogeneities.
- Existing simulation methods (MD, MC, lattice glass) can be computationally intensive.
Purpose of the Study:
- Introduce a novel three-dimensional mesoscopic lattice Boltzmann model.
- Simulate strongly-interacting fluids with dynamic inhomogeneities efficiently.
Main Methods:
- Extended standard lattice Boltzmann dynamics.
- Constrained streaming based on nonlocal fluid density.
- Three-dimensional mesoscopic lattice structure.
Main Results:
- Model exhibits features of dynamically heterogeneous fluids.
- Observed long-time relaxation and non-Gaussian density distributions.
- Successfully simulated dynamic heterogeneities.
Conclusions:
- The developed lattice Boltzmann model accurately captures complex fluid dynamics.
- Its parallel nature and lack of noise promise significant speedups over traditional methods.
- This offers a more efficient approach for studying strongly-interacting fluids.