Πλοήγηση ανά Συγγραφέα "Pantazis, S."
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Efficient simulation of rarefied gas flows through tubes of finite length based on kinetic model equations
Pantazis, S.; Valougeorgis, D. (2011)The flow of a rarefied gas through tubes of circular cross-section and finite length, driven by arbitrarily large gradients of pressure is simulated in a computationally efficient manner based on kinetic model equations. ... -
End corrections for rarefied gas flows through capillaries of finite length
Pantazis, S.; Valougeorgis, D.; Sharipov, F. (2013)The influence of end effects on rarefied gas flows through moderately long capillaries is investigated by implementing the concept of effective capillary length, representing a sum of the real length of capillary and its ... -
End corrections for rarefied gas flows through circular tubes of finite length
Pantazis, S.; Valougeorgis, D.; Sharipov, F. (2014)A method to take into account the influence of the inlet/outlet ends on rarefied gas flows through moderately long capillaries proposed previously [Vacuum 97, 26 (2013)] is applied to gas flows through circular tubes. The ... -
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. ... -
Heat transfer through rarefied gases between coaxial cylindrical surfaces with arbitrary temperature difference
Pantazis, S.; Valougeorgis, D. (2010)The problem of nonlinear heat transfer through a rarefied gas confined between concentric cylinders maintained at different temperatures is investigated. The formulation is based on the nonlinear Shakhov kinetic model ... -
Hybrid modeling of time-dependent rarefied gas expansion
Vargas, M.; Naris, S.; Valougeorgis, D.; Pantazis, S.; Jousten, K. (2014)The time evolution of the flow parameters in a system where gas is expanded from a high pressure chamber through a tube toward a low pressure chamber is investigated. During the process, the pressure in the two chambers ... -
Nonlinear vacuum gas flow through a short tube due to pressure and temperature gradients
Pantazis, S.; Naris, S.; Tantos, C.; Valougeorgis, D.; Andre, J.; Millet, F.; Perin, J. P. (2013)The flow of a rarefied gas through a tube due to both pressure and temperature gradients has been studied numerically. The main objective is to investigate the performance of a mechanical vacuum pump operating at low ... -
Pressure driven rarefied gas flow through a slit and an orifice
Misdanitis, S.; Pantazis, S.; Valougeorgis, D. (2012)The flow of a monatomic gas through a slit and an orifice due to an arbitrarily large pressure difference is examined on the basis of the nonlinear Bhatnagar-Gross-Krook (BGK) model equation, subject to Maxwell diffuse ... -
Rarefied gas flow through a cylindrical tube due to a small pressure difference
Pantazis, S.; Valougeorgis, D. (2013)Flow of a rarefied gas through a cylindrical tube connecting two reservoirs maintained at a small pressure difference is considered using the axisymmetric version of the linearised BGK kinetic model equation subject to ... -
Simulation of charged particle motion in a homogeneous magnetic field subject to a random force
Pantazis, S.; Valougeorgis, D.; Grecos, A. P. (2009) -
Simulation of gaseous microscale transport phenomena via kinetic theory
Pantazis, S.; Valougeorgis, D. (2010)Kinetic theory of gases, as described by the Boltzmann or model kinetic equations, provides a solid theoretical approach for solving microscale transport phenomena in gases. Due to significant advancement in computational ... -
Time-dependent rarefied gas flow of single gases and binary gas mixtures into vacuum
Vargas, M.; Naris, S.; Valougeorgis, D.; Pantazis, S.; Jousten, K. (2014)Time-dependent flows of single gases and binary gas mixtures with various molar fractions from a chamber through a short tube into vacuum are examined by simulations and experiments. The main goal is the comparison of the ...