Πλοήγηση ανά Συγγραφέα "Varoutis, S."
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Application of the integro-moment method to steady-state two-dimensional rarefied gas flows subject to boundary induced discontinuities
Varoutis, S.; Valougeorgis, D.; Sharipov, F. (2008)The computational efficiency of the integro-moment method for solving steady-state two-dimensional rarefied gas flows is investigated. The two-dimensional boundary driven flow of a single gas in a cavity is used as a model ... -
Computational and experimental study of gas flows through long channels of various cross sections in the whole range of the Knudsen number
Varoutis, S.; Naris, S.; Hauer, V.; Day, C.; Valougeorgis, D. (2009)A computational and experimental study has been performed for the investigation of fully developed rarefied gas flows through channels of circular, orthogonal, triangular, and trapezoidal cross sections. The theoretical- ... -
Estimation of the Poiseuille number in gas flows through rectangular nano- and micro-channels in the whole range of the Knudsen number
Varoutis, S.; Valougeorgis, D. (2009)Based on a recent work (Valougeorgis, Phys. Fluis 19(9):091701.1-091701.4, 2007), the Poiseuille number for gas flows through channels of orthogonal cross sections is estimated in the whole range of the Knudsen number from ... -
Experimental and numerical investigation in flow configurations related to the vacuum systems of fusion reactors
Varoutis, S.; Hauer, V.; Day, C.; Pantazis, S.; Valougeorgis, D. (2010)Vacuum flows in various configurations, which are related to fusion reactors are simulated using linear kinetic theory and the direct simulation Monte Carlo method (DSMC), in the whole range of the Knudsen number. In the ... -
Gas-surface scattering effect on vacuum gas flows through rectangular channels
Pantazis, S.; Varoutis, S.; Hauer, V.; Day, C.; Valougeorgis, D. (2011)Flow of a rarefied gas through a channel of rectangular cross section is investigated numerically and experimentally. Emphasis is given on the study of the molecular scattering law influence at the wall boundary surfaces. ... -
A novel experimental setup for gas microflows
Pitakarnnop, J.; Varoutis, S.; Valougeorgis, D.; Geoffroy, S.; Baldas, L.; Colin, S. (2010)A new experimental setup for flow rate measurement of gases through microsystems is presented. Its principle is based on two complementary techniques, called droplet tracking method and constant-volume method. Experimental ... -
Rarefied gas flow in concentric annular tube: Estimation of the Poiseuille number and the exact hydraulic diameter
Breyiannis, G.; Varoutis, S.; Valougeorgis, D. (2008)The fully developed flow of rarefied gases through circular ducts of concentric annular cross sections is solved via kinetic theory. The flow is due to an externally imposed pressure gradient in the longitudinal direction ... -
Rarefied gas flow through short tubes into vacuum
Varoutis, S.; Valougeorgis, D.; Sazhin, O.; Sharipov, F. (2008)A rarefied gas flow into vacuum through a tube of finite length is investigated over the whole range of gas rarefaction by the direct simulation Monte Carlo method. The nonequilibrium effects at the inlet and outlet of the ... -
Rarefied gas flow through tubes of finite length
Varoutis, S.; Valougeorgis, D.; Sharipov, F. (2009)The flow of rarefied gases through tubes of finite length due to a pressure gradient is investigated by the Direct Simulation Monte Carlo (DSMC) method. The non-equilibrium effects at the inlet and outlet of the tube have ... -
Simulation of gas flow through tubes of finite length over the whole range of rarefaction for various pressure drop ratios
Varoutis, S.; Valougeorgis, D.; Sharipov, F. (2009)The rarefied gas flow through circular tubes of finite length has been investigated computationally by the direct simulation Monte Carlo method. The reduced flow rate and the flow field have been calculated as functions ...