S
Stefan Stefanov
Researcher at Bulgarian Academy of Sciences
Publications - 122
Citations - 1624
Stefan Stefanov is an academic researcher from Bulgarian Academy of Sciences. The author has contributed to research in topics: Direct simulation Monte Carlo & Knudsen number. The author has an hindex of 22, co-authored 115 publications receiving 1320 citations. Previous affiliations of Stefan Stefanov include National Academy of Sciences of Belarus & Ferdowsi University of Mashhad.
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Proceedings ArticleDOI
On the Effect of the Boundary Conditions and the Collision Model on Rarefied Gas Flows
TL;DR: In this article, the effect of the gas surface interaction law and of the intermolecular collision model is examined by solving, using the DSMC method, the heat transfer problem between parallel plates and the non-isothermal Poiseuille flow problem.
Journal ArticleDOI
Monte Carlo simulation of molecular beams in a hot-wall epitaxy system
TL;DR: In this article, a kinetic model of a two-source conventional hot-wall epitaxy process is numerically examined using a Direct Monte Carlo Simulation (DSMC) method and the results refer to Knudsen numbers of 10−2.
Proceedings ArticleDOI
Modeling of gas flows through microchannel configurations
Abstract: The present work is related to the study of the pressure driven isothermal gas flows through different microchannel configurations such as short straight micro-channels, 900 bend channels and T-shaped junctions. The direct simulation Monte Carlo (DSMC) method is used to calculate the gas flow through channel configurations in order to distinguish the flow regimes taking place in long and short microchannels. All the simulations were carried out in three dimensions but some of obtained results concern two dimensional configurations. In this case, the third dimension is confined between two specularly reflecting walls so that the flow in the third direction to be homogeneous. Implicit boundary conditions were applied to maintain a given pressure at inlet and outlet (I/O) boundaries. For small Knudsen number gas flow, the DSMC results are compared to the continuum numerical solution of the Navier-Stokes-Fourier equations obtained by using SIMPLE-TS finite volume method.
Proceedings ArticleDOI
Cylindrical Couette Flow of Rarefied Gas: Comparison between Navier‐Stokes and DSMC Computations
TL;DR: In this paper, the cylindrical Couette flow of a rarefied gas is studied in the case of two cylinders rotating with different velocities and a numerical solution of the Navier-Stokes equations for compressible flow is found.
Proceedings ArticleDOI
Modeling of Cylindrical Couette Flow of Rarefied Gas. The Case of Rotating Outer Cylinder
TL;DR: In this article, the cylindrical Couette flow of a rarefied gas is studied in the case when the outer cylinder is rotating while the inner cylinder is at rest, and velocity, density and temperature profiles are investigated by a Direct Monte Carlo Simulation method and a numerical solution of the Navier-Stokes equations for compressible flow is found.