Bhatnagar–Gross–Krook (BGK) models are widely used to study rarefied gas dynamics.
However, as simplified versions of the Boltzmann collision model, their performances are …

Multi-scale phenomena are prevalent and significant across various disciplines. For multi-
scale flow physics in the gas-kinetic theory based on Boltzmann equation or its simplified …

A comprehensive numerical study is performed to investigate gas flows inside the inlet of an
atmosphere-breathing electric propulsion (ABEP) system operating in the upper atmosphere …

The implementation of the ellipsoidal statistical Bhatnagar-Gross-Krook (ESBGK) method in
the open-source particle code PICLas is extended for multi-species modeling of polyatomic …

This paper introduces a new asymptotic-preserving Monte Carlo (APMC) method for
simulating multi-species gas flows. This method decomposes the collision operator of the …

The simulation of rarefied gas flow based on the Boltzmann equation is challenging,
especially when the gas mixtures have disparate molecular masses. In this paper, a …

The multi-scale flow mechanism is crucial for the force and heat loaded on near-space
vehicles, the control of spacecraft, and the propelling and cooling of microelectromechanical …

The direct simulation Monte Carlo (DSMC) method is applicable over a wide range of
Knudsen numbers. However, the binary collision events make DSMC prohibitively …

We propose a mixed Boltzmann–BGK model for mixtures of monatomic gases, where some
kinds of collisions are described by bi–species Boltzmann operators and the others by the …

The simulation of rarefied gas flow based on the Boltzmann equation is challenging,
especially when the gas mixtures have disparate molecular masses. In this paper, a …