Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Graham, V."'
Publikováno v:
Journal of Thermophysics and Heat Transfer. 34:556-569
A computational approach is developed to simulate high-enthalpy shock propagation under strong nonequilibrium conditions, such as reentry experiments at NASA’s Electric Arc Shock Tube (EAST) facili...
Autor:
Ioannis Nompelis, Savio J. Poovathingal, Graham V. Candler, Eric C. Stern, Thomas E. Schwartzentruber
Publikováno v:
Journal of Computational Physics. 380:427-441
Micro scale simulations are performed of flow through porous (pyrolyzing) thermal protection system (TPS) materials using the direct simulation Monte Carlo (DSMC) method. DSMC results for permeability are validated with computational fluid dynamics (
Publikováno v:
Journal of Thermophysics and Heat Transfer. 26:545-558
An energy-bin-based coupling model for recombination is derived for high-enthalpy nozzle flows using oxygen as the test gas. The coupling between vibrational and rotationalmodes is taken into account by the use of energy bins. A prior recombination d
Publikováno v:
Physical Review Fluids. 1
Nitrogen dissociation is studied using direct molecular simulation with a new potential-energy surface. Both ${N}_{2}$ - ${N}_{2}$ and $N$ - ${N}_{2}$ processes are simulated as they concurrently take place in an evolving nonequilibrium gas system. T
Publikováno v:
54th AIAA Aerospace Sciences Meeting.
We present DMS calculations to investigate vibrational excitation and dissociation in molecular nitrogen, including both N 3 and N 4 processes and under strong nonequilibrium conditions. A preliminary constitutive model is also described and paramete
Publikováno v:
Plasma Chemistry and Plasma Processing. 28:213-231
A numerical model has been developed to analyze arc-anode attachment in direct-current electric arcs. The developed model fully couples a plasma flow with electromagnetic fields in a self-consistent manner. Electrons and heavy species are assumed to
Autor:
Zoltan Varga, Graham V. Candler, Ioannis Nompelis, Jason D. Bender, Donald G. Truhlar, Paolo Valentini, Yuliya Paukku, Thomas E. Schwartzentruber
Publikováno v:
The Journal of chemical physics. 143(5)
Accurate modeling of high-temperature hypersonic flows in the atmosphere requires consideration of collision-induced dissociation of molecular species and energy transfer between the translational and internal modes of the gas molecules. Here, we des
Autor:
Deepak Bose, Graham V. Candler
Publikováno v:
Journal of Thermophysics and Heat Transfer. 12:214-222
A model for nitric oxide (NO) formation in low-density hypersonic e ows is presented. The thermal nonequilibrium reaction rates, reactant energy removal rates, and product energy disposal rates are based on a quasiclassical trajectory analysis of the
Autor:
Graham V. Candler, Deepak Bose
Publikováno v:
Physics of Fluids. 9:1171-1181
In this paper the extensive quasiclassical trajectory (QCT) study recently concluded [J. Chem. Phys. 104, 2825 (1996)] is used to model the kinetics of the primary NO formation reaction, N2+O→NO+N, in hypersonic nonequilibrium flows. The QCT data a
Publikováno v:
AIAA Journal. 35:288-294
In many hypersonicows, the excited states of some chemical species are the dominant radiators. Often, those electronically excited particles are present in small concentrations and the chemical kinetics mechanisms for their formation are very complic