This paper describes a Unified Flow Solver (UFS) for rarefied and continuum gas flows. The UFS separates the rarefied and continuum flow domains and selects appropriate solvers to combine theâ€¦ (More)

A Unified Flow Solver (UFS) has been developed for simulations of rarefied, transitional and continuum flows based on direct numerical solution of the Boltzmann equation coupled to kinetic schemes ofâ€¦ (More)

Low speed gas flows are studied using a Unified Flow Solver (UFS) that automatically selects continuum-fluiddynamic and kinetic solvers for near-equilibrium and kinetic domains. Direct Numericalâ€¦ (More)