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pro vyhledávání: '"Boccelli, Stefano"'
Autor:
Boccelli, Stefano
This technical note reports the expression of selected higher-order moments associated with the Mott-Smith solution of the shock-wave profile. The considered moments are the pressure tensor, the heat-flux vector and tensor, the fourth-order double-te
Externí odkaz:
http://arxiv.org/abs/2409.19026
This work explores the different shapes that can be realized by the one-particle velocity distribution functions (VDFs) associated with the fourth-order maximum-entropy moment method. These distributions take the form of an exponential of a polynomia
Externí odkaz:
http://arxiv.org/abs/2402.18453
Maximum-entropy moment methods allow for the modelling of gases from the continuum regime to strongly rarefied conditions. The development of approximated solutions to the entropy maximization problem has made these methods computationally affordable
Externí odkaz:
http://arxiv.org/abs/2401.15233
The 10 and 14-moment maximum-entropy methods are applied to the study of high-Mach-number non-reacting crossflows past a flat plate at large degrees of rarefaction. The moment solutions are compared to particle-based kinetic solutions, showing a vary
Externí odkaz:
http://arxiv.org/abs/2308.00551
Autor:
Boccelli, Stefano, McDonald, James G.
This work introduces a limitation on the minimum value that can be assumed by the energy of a relativistic gas in the presence of a non-zero heat flux. Such a limitation arises from the non-negativity of the particle distribution function, and is fou
Externí odkaz:
http://arxiv.org/abs/2208.07890
Ions in Hall effect thrusters are often characterized by a low collisionality. In the presence of acceleration fields and azimuthal electric field waves, this results in strong deviations from thermodynamic equilibrium, introducing kinetic effects. T
Externí odkaz:
http://arxiv.org/abs/2202.04159
A reversed gas feed configuration for Hall thrusters is proposed and studied numerically. As an alternative to standard direct injection, we investigate the effect of injecting the propellant near the channel exit and directing it backwards, towards
Externí odkaz:
http://arxiv.org/abs/2107.09446
Autor:
Boccelli, Stefano, Giroux, Fabien, Magin, Thierry E., Groth, Clinton P. T., McDonald, James G.
Publikováno v:
Physics of Plasmas 27, 123506 (2020)
A 14-moment maximum-entropy system of equations is applied to the description of non-equilibrium electrons in crossed electric and magnetic fields and in the presence of low collisionality, characteristic of low-temperature plasma devices. The flexib
Externí odkaz:
http://arxiv.org/abs/2103.14406
Autor:
Boccelli, Stefano, Charoi, Thomas, Alvarez-Laguna, Alejandro, Chabert, Pascal, Bourdon, Anne, Magin, Thierry E.
The genesis of the ion axial velocity distribution function (VDF) is analyzed for collisionless Hall thruster discharges. An analytical form for the VDF is obtained from the Vlasov equation, by applying the Tonks-Langmuir theory in the thruster chann
Externí odkaz:
http://arxiv.org/abs/2006.05136
The simulation of thermochemical nonequilibrium for the atomic and molecular energy level populations in plasma flows requires a comprehensive modeling of all the elementary collisional and radiative processes involved. Coupling detailed chemical mec
Externí odkaz:
http://arxiv.org/abs/1812.03933