Mario Capitelli

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The present paper contains considerations relative to the long debated thermodynamic derivation of two-temperature Saha equations. The main focus of our discourse is on the dependence of the multitemperature equilibrium conditions on the constraints imposed on the thermodynamic system. We also examine the following key issues related to that dependence:(More)
Soil is unanimously considered as one of the most important sink of heavy metals released by human activities. Heavy metal analysis of natural and polluted soils is generally conducted by the use of atomic absorption spectroscopy (AAS) or inductively coupled plasma optical emission spectroscopy (ICP-OES) on adequately obtained soil extracts. Although in(More)
Double-pulse laser-induced plasma spectroscopy (DP-LIPS) is applied to submerged targets to investigate its feasibility for elemental analysis. The role of experimental parameters, such as inter-pulse delay and detection time, has been discussed in terms of the dynamics of the laser-induced bubble produced by the first pulse and its confinement effect on(More)
Formation of rovibrational excited molecular hydrogen from atomic recombination has been computationally studied using three body dynamics and orbiting resonance theory. Each of the two methods in the frame of classical mechanics, that has been used for all of the calculations, appear complementary rather than complete, with similar values in the low(More)
Thermodynamic and transport properties of high temperature equilibrium air plasmas have been calculated in a wide pressure (0.01 ÷ 100 atm) and temperature range (50 ÷ 60 000 K). The results have been obtained by using a self-consistent approach for the thermodynamic properties and higher order approximation of the Chapman-Enskog method for the transport(More)
A two-dimensional in space and three-dimensional in velocity, fully kinetic particle-in-cell (PIC) model of the atom (Xe), ion (Xe+) and electron dynamics of a stationary plasma thruster is developed. Electron-neutral elastic scattering, excitation and ionization processes are modelled by Monte Carlo collision methodology. The interaction of the plasma(More)
A PIC-MCC/fluid hybrid model was employed to study a parallel-plate capacitively coupled radio-frequency discharge in hydrogen, under the application of a dc bias voltage. When a negative dc voltage was applied to one of the electrodes of a continuous wave (cw) plasma, a ‘beam’ of secondary electrons was formed that struck the substrate counter-electrode at(More)
We present a comparison of numerical results in strongly expanding hypersonic flows that have been obtained using state-to-state and macroscopic thermochemical models. The macroscopic model, which includes direct cross coupling between chemical and vibrational relaxation, has been derived directly from the state-to-state kinetic rates. This makes the(More)