Binary fluid flow simulations with free energy lattice Boltzmann methods
Copyright policy )Binary fluid flow simulations with free energy lattice Boltzmann methods
We use free energy lattice Boltzmann methods to simulate shear and extensional flows of a binary fluid in two and three dimensions. To this end, two classical configurations are digitally twinned, namely a parallel-band device for binary shear flow and a four-roller apparatus for binary extensional flow. The free energy lattice Boltzmann method and the test cases are implemented in the open-source parallel C++ framework OpenLB and evaluated for several non-dimensional numbers. Characteristic deformations are captured, where breakup mechanisms occur for critical capillary regimes. Though the known mass leakage for small droplet-domain ratios and large Cahn numbers is observed, suitable mesh sizes show good agreement to analytical predictions and reference results.
- Durham University United Kingdom
- Karlsruhe Institute of Technology Germany
- Karlsruhe Institute of Technology / KIT Germany
ddc:510, lattice Boltzmann methods, 660, Navier-Stokes equations for incompressible viscous fluids, Lattice Boltzmann methods, multicomponent flow, Multiphase and multicomponent flows, 530, 510, Cahn-Hilliard equation, Rarefied gas flows, Boltzmann equation in fluid mechanics, free energy model, Navier–Stokes equations, Particle methods and lattice-gas methods, Cahn–Hilliard equation, Numerical solution of discretized equations for initial value and initial-boundary value problems involving PDEs, Navier-Stokes equations, Mathematics, info:eu-repo/classification/ddc/510
ddc:510, lattice Boltzmann methods, 660, Navier-Stokes equations for incompressible viscous fluids, Lattice Boltzmann methods, multicomponent flow, Multiphase and multicomponent flows, 530, 510, Cahn-Hilliard equation, Rarefied gas flows, Boltzmann equation in fluid mechanics, free energy model, Navier–Stokes equations, Particle methods and lattice-gas methods, Cahn–Hilliard equation, Numerical solution of discretized equations for initial value and initial-boundary value problems involving PDEs, Navier-Stokes equations, Mathematics, info:eu-repo/classification/ddc/510
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