Results Publications    Data    Examples

Publications: Janda M., Martišovitš V., Morvová M., Machala Z., Hensel K.: Monte Carlo Simulations of Electron Dynamics in N2/CO2 Mixtures, accepted in Eur. Phys. J. D (2007) abstract Janda M.: The Study Of Plasma Induced Chemistry In Gaseous Mixture N2-CO2-H2O, Thesis, Comenius University Bratislava, Universität Innsbruck (2006) abstract Janda M., Hensel K., Martišovitš V., Morvová M.: Theoretical Study of Influence of H2O on Parameters of Low-Temperature Plasmas in Humid Mixtures, Czech. J. Phys., 56, B774-B780 (2006). Abstract: Monte Carlo (MC) electron dynamic simulations in dry and humid N2, O2, CO2 and air were performed in order to obtain electron energy distribution functions (EEDFs), mean free path (λ), drift velocity (vd) and collision frequency of electrons (ν), their mean energy (ε) and rate coefficients of electron impact reactions, as functions of reduced electric field strength (E/N) and concentration of H2O. The aim was to test the latest compilation of cross–sections for H2O, the applicability of the MC method used, and the effect of the H2O concentration. A sensitivity of various parameters to the presence of H2O differs, e. g. λ and ν are more sensitive than ε and vd, and it depends strongly on the E/N. For E/N > 100 Td the parameters may be approximated as their linear combinations of values in pure gases. The difference is below 10 %. For E/N < 100 Td, the difference increases rapidly and MC simulations in mixtures are necessary. The presence of H2O increases the rate coefficients of most studied reactions for E/N > 60 Td. Processes with higher threshold energy imply stronger increase. Janda M., Machala Z., Morvová M., Franček V., Lukáč P.: WEB-EEDF: Open Source Software for Modeling the Electron Dynamics, Acta Phys. Slovaca 55, 507-514 (2005). abstract Do not hesitate to contact me to obtain any of these publications. Data: N2-CO2 mixture Matrixes with fitting coefficients which enable a calculation of the electron mean energy, drift velocity of electrons, mean free path of electrons, collision frequency of electrons with neutrals and selected electron-impact reactions in N2-CO2 mixture as functions of reduced electric field strength (E/N)) and concentration of N2:     n2-co2_matrixes.dat, n2-co2_matrixes.ods Read following paper for more information: Janda M., Martišovitš V., Morvová M., Machala Z., Hensel K.: Monte Carlo Simulations of Electron Dynamics in N2/CO2 Mixtures, accepted in Eur. Phys. J. D (2007) Since this paper was not published yet, please contact me to obtain a draft version. Examples: As for example I present here some results from calculations in dry air (80% N2 and 20% O2) and pure N2 and O2 performed at normal conditions (293 K, 101315 Pa) with 20 million computational cycles. Calculations in these gases also served for the verification of Web-EEDF algorithm, since I could compare these results with literature. Normalised EEDFs as functions of reduced field strength in dry air. Comparison of calculated drift velocity of electrons in dry air with data found in the literature. Babaeva et al.: Babaeva N. Yu., Kulilovski A. A., Mnatsakanyan A. Kh., Naidis G. V. and Solosolov M.Yu., The streamer propagation models in N2-O2 mixtures and flue gas, research report IVTAN ANRA 93/2, Moscow, Russia, 1993 Verhaart: Verhaart H. F. A., Kema Scient. Tech. Rep., 7 (1989) 377 Comparison of calculated mean energy of electrons in pure N2 and O2 with data found in the literature. Siglo: The Siglo Data base, CPAT and Kinema Software, http://www.siglo-kinema.com Branching of electron energy to various electron-impact processes in dry air as a function of reduced electric field strength. vib - vibrational excitation of molecules exc - electronic excitation of molecules ion - electron-impact ionization Home