Exploring Chemical and Thermal Non-equilibrium in Nitrogen Arcs

Thermo - chemical dynamics and chemical quasi - equilibrium of plasmas in thermal non - equilibrium

Plasmas have a broad field of applications, such as air-breathing hypersonic vehicles (plasma control for scramjet engine), spacecraft atmospheric entries (influence of precursor electrons and prediction of blackout phenomenon), high-enthalpy wind tunnels (plasmatron, arc-jet, and shock tube facilities), lightning phenomena, discharges at atmospheric pressure, laboratory nuclear fusion and astr...

Non-equilibrium dissociation of nitrogen

Dissociation rates of molecular nitrogen in electrical discharges have been calculated by solving a system of master equations, including V-V (vibration-vibration), V-T (vibrationtranslation) and e-V (electron-vibration) energy transfers. The results show that the dissociation rates slightly increase with decreasing gas temperature in the temperature range 1 000-2 000 K at the electron temperat...

Quasi-State-Specific QCT Method for Calculating the Dissociation Rate of Nitrogen in Thermal Non-Equilibrium

The dissociation of nitrogen was studied using a quasi-classical trajectory (QCT) analysis in the context of calculating the dissociation rate surface for a dense range of temperatures for use in computational fluid dynamics (CFD) applications. By sampling rovibrational states from a Boltzmann distribution but uniformly sampling the relative speed, the dissociation rate was calculated for trans...

Non-equilibrium Thermal Effects in Power Transistors

This work addresses electro-thermal simulation of LDMOS devices and associated non-equilibrium effects. Simulations have been performed on three kinds of LDMOS i.e. bulk Si, partial SOI and SOI, with a view to compare the extent of non-equilibrium in each. Phonon temperature contours and electron energies were analyzed in each case. The results indicate that, under similar operating conditions,...

Thermal non-equilibrium transport in colloids