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Lukáš DVONČ
alumni student
Bc. study
2007 - 2008
Supervisor: Zdenko Machala
Title:
Abstract:
MSc. study
2009 - 2011
Supervisor: Mário Janda
Title:
Kinetic model of plasma generated by transient spark.
Abstract:
The primary aim of this work was to create a computational model capable to
describe chemical processes induced by a relatively new type of discharge named
transient spark (TS). TS is a DC driven pulsed atmospheric pressure discharge with high repetition frequency (~ kHz) of short (~100 ns) high current pulses (~A). It was already applied for various environmental and biological applications.
The main part of this work was related to the development of computational
package, which can calculate the evolution of concentration of plasma species, taking into account the pulse character of TS. Developed package is based on available open source ZDPlaskin libraries.
Created package is able to characterize both short high current pulse phase of the discharge with fast changes of plasma, and the long relaxation phase (~ ms) with slow changes of plasma parameters. Time evolution of reduced electric field strength (E/N) characterizing TS is loaded from an external file. The concentration of electrons (ne) can be loaded from an external file too, but it can be also calculated by the program itself.
The time evolution of E/N and ne for these external files was estimated from measured electrical parameters of TS.
Next, developed model was used to calculate the evolution of various species in
air plasma generated by TS. The evolution of excited N2 and O species, as well as there interactions is described in this work. Calculated data were finally qualitatively compared with experimentally obtained emission intensities of N2 (C) and O* species. Good agreement was observed if both E/N and ne were loaded from external files. On the other hand, significant differences were observed if ne was calculated by the model itself. It can be most probably explained by inaccurate approximation of E/N profile.
PhD. study
2011 - 2016
Supervisor: Mário Janda
Title:
Modeling of plasma chemical processes in transient spark in N2-O2 mixture
Abstract:
The primary aim of this work is to create a computational model capable to
describe chemical processes induced by a relatively new type of discharge named
transient spark (TS). TS is a DC driven pulsed atmospheric pressure discharge with high repetition frequency (~ kHz) of short (~100 ns) high current pulses (~A). It was already applied for various environmental and biological applications.
One part of this work will be related to the development of computational
package for the calculation the evolution of concentration of plasma species, taking into account the pulse character of TS. Developed package is based on available open source ZDPlaskin libraries.
Another part of this work will be associated with development of a physical
model describing time evolution of reduced electric field strength (E/N) in TS. For this purpose we will use Open Foam, a open source multi physical modeling platform. It will be used for simulation of hydrodynamic effects involved in TS, namely during the streamer-to-spark transition phase.
The results of the whole model will be compared with experimental data, obtained
mainly by time resolved optical emission spectroscopy. Thus we can evaluate the model.
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Active
Richard CIMERMAN
Július GÁLIK
Paulína HALUŠKOVÁ
Axel HENNECKE
Daniel JAKUBČIN
Katarína KUČEROVÁ, born Tarabová
Pavol MIŠENKO
Diana RAČKOVÁ
Barbora TARABOVÁ
Alumni
Hana BUCHHOLCEROVÁ
Veronika DRENINOVÁ, born Biskupičová
Lukáš DVONČ
Dušan GIERTL
Lenka CHLÁDEKOVÁ
Karolína JANÍKOVÁ
Igor JEDLOVSKÝ
Matej KINTLER
Matej KOVÁČ
Zuzana KOVAĽOVÁ, born Šipoldová
Daniela KUNECOVÁ
Lenka LEŠTINSKÁ
Michal LEŠTINSKÝ
Matej MOLNÁR
Adriana NIKLOVÁ
Samuel OMASTA
Lucia PAKOSOVÁ
Michal PELACH
Adam POLAKOVIČ
Branislav PONGRÁC
Milan PRAČKO
Jozef SIČ
Lucia STRIŽENCOVÁ
Anna SUČANSKÁ
Juraj ZIGO
Andrea ŽILKOVÁ
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