Stefan Stefanov

TL;DR: In this paper, the authors present a detailed summary of different collision models developed in the framework of the direct simulation Monte Carlo (DSMC) method, i.e., the simplified Bernoulli trial (SBT), which permits efficient low-memory simulation of rarefied gas flows.

TL;DR: The development and validation of a modified simulation procedure which allows more accurate calculations with a smaller mean number of particles in the grid cells, making the modified DSMC method an effective numerical tool for both steady and unsteady gas flow calculations on fine multidimensional grids.

TL;DR: In this article, the authors investigated the long time behavior of the Rayleigh-Benard (RB) flow of a rarefied monatomic gas for a set of the non-dimensional Knudsen and Froude numbers in the intervals Kn∈[1.0×10−3,4× 10−2], Fr∈ [1.5×103], for the most part of the computations the third nondimensional parameter, the ratio of the cold and hot wall temperatures is fixed to Tc/Th=0.1, corresponding to a large temperature

TL;DR: The two-dimensional velocity distribution functions are obtained to report the molecular-based entropy distribution, and it is shown that the cold-to-hot heat transfer in the cavity is well in accordance with the second law of thermodynamics and takes place in the direction of increasing entropy.

TL;DR: In this paper, the authors report and discuss the results of a direct Monte Carlo simulation of the flow of a rarefied gas flowing between two cylinders when the inner one rotates.