Non-Equilibrium Gas Flows 2018
In such flows various non-equilibrium transport phenomena appear, which cannot be tackled by the typical Navier-Stokes approach. Under these rarefied conditions the roles played by the interactions between the gas and the solid device surface as well as in between the gas molecules become essential. The boundary condition models often require empirical adjustments strongly dependent on the (micro) manufacturing technique, while novel intermolecular collision models are subject to validation based on realistic potentials obtained by experimental work. The involved methodologies include extended hydrodynamics, kinetic theory and molecular dynamics.
In this field there are still many theoretical, computational and experimental issues to be resolved in order to advance technological achievements and design optimization.