Moment Method Boundary Conditions for Multiphase Lattice Boltzmann Simulations with Partially-Wetted Walls. (March 2015)

• Record Type: Journal Article
• Authors: Hantsch, Andreas; Reis, Tim; Gross, Ulrich
• Is Part Of: Journal of computational multiphase flows. Volume 7:Number 1(2015)
• Page Start: 1
• Page End: 14
• Publication Date: 2015-03
• Subjects: Lattice Boltzmann Method -- Multiphase Flow -- Moment-based Boundary Conditions -- Partial Wetting; Multiphase flow -- Data processing -- Periodicals; 620.106
• DOI: 10.1260/1757-482X.7.1.1
• Languages: English
• ISSNs: 1757-482X

Abstract

We propose a lattice Boltzmann approach for simulating contact angle phenomena in multiphase fluid systems. Boundary conditions for partially-wetted walls are introduced using the moment method. The algorithm with our boundary conditions allows for a maximum density ratio of 200000 for neutral wetting. The achievable density ratio decreases as the contact angle departs from 90°, but remains of the order O(10 2 ) for all but extreme contact angles. In all simulations an excellent agreement between the simulated and nominal contact angles is observed.