Journal of Computational Physics
High-resolution Burnett simulations of micro Couette flow and heat transfer
Journal of Computational Physics
Journal of Computational Physics
Journal of Computational Physics
Numerical Regularized Moment Method of Arbitrary Order for Boltzmann-BGK Equation
SIAM Journal on Scientific Computing
NR$xx$ Simulation of Microflows with Shakhov Model
SIAM Journal on Scientific Computing
Journal of Computational Physics
Affordable robust moment closures for CFD based on the maximum-entropy hierarchy
Journal of Computational Physics
Hi-index | 31.46 |
Boundary conditions are the major obstacle in simulations based on advanced continuum models of rarefied and micro-flows of gases. In this paper, we present a theory how to combine the regularized 13-moment-equations derived from Boltzmann's equation with boundary conditions obtained from Maxwell's kinetic accommodation model. While for the linear case these kinetic boundary conditions suffice, we need additional conditions in the non-linear case. These are provided by the bulk solutions obtained after properly transforming the equations while keeping their asymptotic accuracy with respect to Boltzmann's equation. After finding a suitable set of boundary conditions and equations, a numerical method for generic shear flow problems is formulated. Several test simulations demonstrate the stable and oscillation-free performance of the new approach.