Unified Flow Solver

As a result of a Small Business Innovation Research project supported by AFRL, CFD Research Corporation and the Russian Academy of Sciences developed a Unified Flow Solver (UFS) for simulation of gas flows in the entire range of Knudsen numbers.

The UFS is capable of automatically switching between a deterministic Boltzmann solver and a continuum CFD solver depending on local gradients of gas density, flow velocity, and temperature. Currently, the UFS is being extended for multicomponent mixtures and molecular gases with internal degrees of freedom. With these extensions, the UFS will be valuable for many practical applications ranging from trans-atmospheric flights to advanced material processing and semiconductor manufacturing.

Supersonic flow around a cylinder for different Kn numbers.
Gas density (left), Kinetic (red) and Continuum (blue) domains on the right

Publications

Please contact us for more information about the application of the United Flow Solver for your specific needs.