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Dr. Konstantinos Kourtzanidis
Centre for Research and Technology-Hellas (CERTH)

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0 Aerospace Engineering
0 Applied Physics
0 Fluid Mechanics
0 Plasma Engineering
0 Smart cities and transportation

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Journal article
Published: 01 July 2021 in Sustainability
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We report on a novel evaluation framework to globally assess the footprint of smart cities and communities (SCC) projects, being also expandable to the case of smart grid related projects. The uniform smart city evaluation (USE) framework is constructed upon three complementary evaluation axes: the first one aims to weigh up the success of a SCC project based on performance metrics against pre-defined project-specific target values. The second axis focuses on the project’s impact towards the sustainability of a city and it is bench-marked against national and international key objectives arising from strategic plans. This bench-marking feeds the third axis which provides a more inclusive evaluation against four pre-defined and widely acclaimed sectors of interest. The steps to be followed for the uniform evaluation of each axis and corresponding index are presented in detail, including necessary key performance indicator (KPI) normalization, weighting, and aggregation methods. The resulting indices’ scores for each axis (namely project performance index, sustainability impact index, and sustainability performance index) can be post-processed with adequate data processing and visualization tools to extract important information on the extent to which the range of success of a SCC project contributes to the city sustainability progress. Illustrative examples from an on-going SCC project are provided to highlight the strengths of the approach. The proposed framework can be used to compare multiple projects within a city and sustainability and project performance in different cities, evaluate the interventions chosen per project against city needs, benchmark and design future projects (with, e.g., reverse engineering, projections), as well as evaluate various spatial and temporal scales.

ACS Style

Konstantinos Kourtzanidis; Komninos Angelakoglou; Vasilis Apostolopoulos; Paraskevi Giourka; Nikolaos Nikolopoulos. Assessing Impact, Performance and Sustainability Potential of Smart City Projects: Towards a Case Agnostic Evaluation Framework. Sustainability 2021, 13, 7395 .

AMA Style

Konstantinos Kourtzanidis, Komninos Angelakoglou, Vasilis Apostolopoulos, Paraskevi Giourka, Nikolaos Nikolopoulos. Assessing Impact, Performance and Sustainability Potential of Smart City Projects: Towards a Case Agnostic Evaluation Framework. Sustainability. 2021; 13 (13):7395.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Komninos Angelakoglou; Vasilis Apostolopoulos; Paraskevi Giourka; Nikolaos Nikolopoulos. 2021. "Assessing Impact, Performance and Sustainability Potential of Smart City Projects: Towards a Case Agnostic Evaluation Framework." Sustainability 13, no. 13: 7395.

Journal article
Published: 16 June 2021 in Journal of Physics D: Applied Physics
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ACS Style

Huw Borradaile; Konstantinos Kourtzanidis; Francois Rogier; Kwing-So Choi; Xuerui Mao. Flow reversal in millimetric annular DBD plasma actuator. Journal of Physics D: Applied Physics 2021, 54, 345202 .

AMA Style

Huw Borradaile, Konstantinos Kourtzanidis, Francois Rogier, Kwing-So Choi, Xuerui Mao. Flow reversal in millimetric annular DBD plasma actuator. Journal of Physics D: Applied Physics. 2021; 54 (34):345202.

Chicago/Turabian Style

Huw Borradaile; Konstantinos Kourtzanidis; Francois Rogier; Kwing-So Choi; Xuerui Mao. 2021. "Flow reversal in millimetric annular DBD plasma actuator." Journal of Physics D: Applied Physics 54, no. 34: 345202.

Accepted manuscript
Published: 06 April 2021 in Journal of Physics D: Applied Physics
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We show that the spatio-temporal ElectroHydroDynamic (EHD) force production in surface AC-Dielectric Barrier Discharge (AC-DBD) actuators is strongly influenced by both the streamer regime during the positive phase and the micro-discharge regime during the negative phase. Focusing on the spatial EHD force profiles, we demonstrate that the ionic wind spatial distribution can only be explained by the positive contribution of the streamer regime. The location of maximum ionic wind is found to be directly linked with the maximum elongation of the streamers at several millimeters from the exposed electrode. In both positive and negative phases of the AC-DBD operation, residual volumetric and surface charges once again linked to the streamer formation and afterburn, result to a variety of positive EHD force zones which, when time-averaged in one AC period, contribute to the generation of the experimentally observed induced thin wall jet. Through a thorough elaboration of our numerical results, we provide an illustrative explanation of the EHD force spatio-temporal evolution, showcase the importance of streamers and retrieve a correct representation of the ionic wind spatial profiles when compared to experiments.

ACS Style

Konstantinos Kourtzanidis; Guillaume Dufour; François Rogier. The electrohydrodynamic force distribution in surface AC dielectric barrier discharge actuators: do streamers dictate the ionic wind profiles? Journal of Physics D: Applied Physics 2021, 54, 26LT01 .

AMA Style

Konstantinos Kourtzanidis, Guillaume Dufour, François Rogier. The electrohydrodynamic force distribution in surface AC dielectric barrier discharge actuators: do streamers dictate the ionic wind profiles? Journal of Physics D: Applied Physics. 2021; 54 (26):26LT01.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Guillaume Dufour; François Rogier. 2021. "The electrohydrodynamic force distribution in surface AC dielectric barrier discharge actuators: do streamers dictate the ionic wind profiles?" Journal of Physics D: Applied Physics 54, no. 26: 26LT01.

Journal article
Published: 02 November 2020 in Journal of Physics D: Applied Physics
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ACS Style

K Kourtzanidis; G Dufour; F Rogier. Self-consistent modeling of a surface AC dielectric barrier discharge actuator: In-depth analysis of positive and negative phases. Journal of Physics D: Applied Physics 2020, 54, 045203 .

AMA Style

K Kourtzanidis, G Dufour, F Rogier. Self-consistent modeling of a surface AC dielectric barrier discharge actuator: In-depth analysis of positive and negative phases. Journal of Physics D: Applied Physics. 2020; 54 (4):045203.

Chicago/Turabian Style

K Kourtzanidis; G Dufour; F Rogier. 2020. "Self-consistent modeling of a surface AC dielectric barrier discharge actuator: In-depth analysis of positive and negative phases." Journal of Physics D: Applied Physics 54, no. 4: 045203.

Journal article
Published: 14 July 2020 in Smart Cities
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As cities grow rapidly and energy needs increase, shaping an effective energy transition is a top priority towards urban sustainability and smart development. This study attempts to answer three key research questions that can help city authorities, planners and interested agents simplify and increase the transparency of Key Performance Indicators (KPIs) selection for smart city and communities (SCC) projects focusing on energy transition and creation of Positive Energy Districts (PEDs): Question 1: “What resources are available for extracting such KPIs?”; Question 2: “Which of those KPIs are the most suitable for assessing the energy transition of smart city projects and PED-related developments?” and Question 3: “How can a project-specific shortlist of KPIs be developed?”. Answering these questions can also serve as a major first step towards a “universal” KPI selection procedure. In line with this purpose, an experiential approach is presented, capitalizing on knowledge and lessons learned from an ongoing smart city project in Europe (POCITYF) that focuses on PED deployment. Under this framework, a) a review of smart city KPI frameworks has been conducted, resulting in a pool of 258 indicators that can potentially be adopted by smart city projects; b) eight key dimensions of evaluations were extracted, setting a holistic performance framework relevant to SCCs; c) a detailed evaluation process including pre-determined criteria and city-needs feedback was applied to shortlist the KPI pool, leading to a ready-to-be-used, project-specific list of 63 KPIs and d) KPIs were sorted and analyzed in different granularity levels to further facilitate the monitoring procedure. The experiential procedure presented in this study can be easily adapted to the needs of every smart city project, serving as a recommendation guide.

ACS Style

Komninos Angelakoglou; Konstantinos Kourtzanidis; Paraskevi Giourka; Vasilis Apostolopoulos; Nikos Nikolopoulos; Julia Kantorovitch. From a Comprehensive Pool to a Project-Specific List of Key Performance Indicators for Monitoring the Positive Energy Transition of Smart Cities—An Experience-Based Approach. Smart Cities 2020, 3, 705 -735.

AMA Style

Komninos Angelakoglou, Konstantinos Kourtzanidis, Paraskevi Giourka, Vasilis Apostolopoulos, Nikos Nikolopoulos, Julia Kantorovitch. From a Comprehensive Pool to a Project-Specific List of Key Performance Indicators for Monitoring the Positive Energy Transition of Smart Cities—An Experience-Based Approach. Smart Cities. 2020; 3 (3):705-735.

Chicago/Turabian Style

Komninos Angelakoglou; Konstantinos Kourtzanidis; Paraskevi Giourka; Vasilis Apostolopoulos; Nikos Nikolopoulos; Julia Kantorovitch. 2020. "From a Comprehensive Pool to a Project-Specific List of Key Performance Indicators for Monitoring the Positive Energy Transition of Smart Cities—An Experience-Based Approach." Smart Cities 3, no. 3: 705-735.

Journal article
Published: 06 July 2020 in Smart Cities
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This study presents an experiential process and a market-oriented approach for realizing cities’ energy transition through smart solutions. The aim of this study is twofold: (a) present a process for defining a repository of innovative solutions that can be applied at building, district, or city level, for two European Union cities, Evora and Alkmaar, and support the deployment of positive energy districts enabling a sustainable energy transition, and (b) understand in a systematic way the attributes of value offered by energy-related smart city solutions, in order to facilitate the development of sustainable value propositions that can successfully address city needs. The repository is assessed against four elements of value, which include social impact, life-changing, emotional, and functional attributes, according to the value pyramid of Maslow. Results show that the value attributes of quality, motivation, integration, cost reduction, information, and organization are highly relevant to the proposed smart solutions. The results presented in this study are useful for city planners, decision-makers, public bodies, citizens, and businesses interested in designing their energy transition strategy and defining novel technologies that promote urban energy sustainability.

ACS Style

Paraskevi Giourka; Vasilis Apostolopoulos; Komninos Angelakoglou; Konstantinos Kourtzanidis; Nikos Nikolopoulos; Vasileios Sougkakis; Federica Fuligni; Stefano Barberis; Karin Verbeek; José Miguel Costa; João Formiga. The Nexus between Market Needs and Value Attributes of Smart City Solutions towards Energy Transition. An Empirical Evidence of Two European Union (EU) Smart Cities, Evora and Alkmaar. Smart Cities 2020, 3, 604 -641.

AMA Style

Paraskevi Giourka, Vasilis Apostolopoulos, Komninos Angelakoglou, Konstantinos Kourtzanidis, Nikos Nikolopoulos, Vasileios Sougkakis, Federica Fuligni, Stefano Barberis, Karin Verbeek, José Miguel Costa, João Formiga. The Nexus between Market Needs and Value Attributes of Smart City Solutions towards Energy Transition. An Empirical Evidence of Two European Union (EU) Smart Cities, Evora and Alkmaar. Smart Cities. 2020; 3 (3):604-641.

Chicago/Turabian Style

Paraskevi Giourka; Vasilis Apostolopoulos; Komninos Angelakoglou; Konstantinos Kourtzanidis; Nikos Nikolopoulos; Vasileios Sougkakis; Federica Fuligni; Stefano Barberis; Karin Verbeek; José Miguel Costa; João Formiga. 2020. "The Nexus between Market Needs and Value Attributes of Smart City Solutions towards Energy Transition. An Empirical Evidence of Two European Union (EU) Smart Cities, Evora and Alkmaar." Smart Cities 3, no. 3: 604-641.

Journal article
Published: 28 July 2018 in Journal of Applied Physics
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ACS Style

Dylan M. Pederson; Konstantinos Kourtzanidis; Laxminarayan L. Raja. Nonlinear hydrodynamic effects in dense microplasmas interacting with microwaves. Journal of Applied Physics 2018, 124, 043303 .

AMA Style

Dylan M. Pederson, Konstantinos Kourtzanidis, Laxminarayan L. Raja. Nonlinear hydrodynamic effects in dense microplasmas interacting with microwaves. Journal of Applied Physics. 2018; 124 (4):043303.

Chicago/Turabian Style

Dylan M. Pederson; Konstantinos Kourtzanidis; Laxminarayan L. Raja. 2018. "Nonlinear hydrodynamic effects in dense microplasmas interacting with microwaves." Journal of Applied Physics 124, no. 4: 043303.

Proceedings article
Published: 07 January 2018 in 2018 AIAA Aerospace Sciences Meeting
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ACS Style

Dylan Pederson; Konstantinos Kourtzanidis; Laxminarayan L. Raja. Multiscale plasma modeling in dynamic fields. 2018 AIAA Aerospace Sciences Meeting 2018, 1 .

AMA Style

Dylan Pederson, Konstantinos Kourtzanidis, Laxminarayan L. Raja. Multiscale plasma modeling in dynamic fields. 2018 AIAA Aerospace Sciences Meeting. 2018; ():1.

Chicago/Turabian Style

Dylan Pederson; Konstantinos Kourtzanidis; Laxminarayan L. Raja. 2018. "Multiscale plasma modeling in dynamic fields." 2018 AIAA Aerospace Sciences Meeting , no. : 1.

Proceedings article
Published: 07 January 2018 in 2018 AIAA Aerospace Sciences Meeting
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ACS Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja. Nanosecond DBD actuator: Species production, ultra-fast gas heating mechanism and fluid response. 2018 AIAA Aerospace Sciences Meeting 2018, 1 .

AMA Style

Konstantinos Kourtzanidis, Laxminarayan L. Raja. Nanosecond DBD actuator: Species production, ultra-fast gas heating mechanism and fluid response. 2018 AIAA Aerospace Sciences Meeting. 2018; ():1.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja. 2018. "Nanosecond DBD actuator: Species production, ultra-fast gas heating mechanism and fluid response." 2018 AIAA Aerospace Sciences Meeting , no. : 1.

Journal article
Published: 01 November 2017 in Physics of Plasmas
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We study analytically and demonstrate numerically that the local effective field approximation (LEFA) for plasma fluid modeling of high-frequency (GHz-THz) discharges in atmospheric pressure air is not valid in regions where the time scale for electron energy transfer to heavy particles is less than the time-period of the electromagnetic (EM) wave. Greater than 50% modulation of the electron temperature around its mean value is found for frequencies around and under 10 GHz for atmospheric pressure air discharges. This modulation decreases significantly as the EM wave frequency increases. Fully coupled numerical simulation of a resonant metallic cut-array illuminated by high frequency EM waves demonstrates that the LEFA can lead to significant errors on both temporal and spatial evolution of the plasma, in cases where this modulation is significant. The LEFA for high pressure air discharges is found to be valid when the EM wave frequency is around or higher than 100 GHz. For lower frequencies or when the reduced electric fields are high enough, the Local Energy Approximation should be used for an accurate description of the plasma development. For low gas pressures, the modulation is very low rendering the LEFA valid over a large EM wave frequency range.

ACS Style

Konstantinos Kourtzanidis; Laxminarayan Raja. Limitations of the effective field approximation for fluid modeling of high frequency discharges in atmospheric pressure air: Application in resonant structures. Physics of Plasmas 2017, 24, 112105 .

AMA Style

Konstantinos Kourtzanidis, Laxminarayan Raja. Limitations of the effective field approximation for fluid modeling of high frequency discharges in atmospheric pressure air: Application in resonant structures. Physics of Plasmas. 2017; 24 (11):112105.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Laxminarayan Raja. 2017. "Limitations of the effective field approximation for fluid modeling of high frequency discharges in atmospheric pressure air: Application in resonant structures." Physics of Plasmas 24, no. 11: 112105.

Journal article
Published: 01 April 2017 in AIAA Journal
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We present a numerical study of plasma dynamics in a three-electrode sliding nanosecond dielectric barrier discharge flow actuator. A two-dimensional self-consistent plasma model including the effect of detail air plasma chemistry and ultrafast gas heating is used in our studies. When a third electrode is placed downstream of a classical two-electrode nanosecond dialectric barrier discharge actuator and powered by a negative direct-current voltage, a coronalike discharge is formed in its immediately vicinity, which in turn changes the dynamic of the primary streamers propagating from the pulsed electrode. The primary streamer slides and can even extend to the entire interelectrode distance. The potential difference between the third electrode, the positively charged dielectric surface, and the virtual anode formed by the streamer itself is found to be the main reason behind this elongation because of the electric field enhancement at the streamer head. Preionization and charge accumulation from the third electrode also contribute to this behavior. The numerical results also indicate that for high electric fields a negative streamer can be produced at the third electrode that merges with the positive streamer from the pulsed electrode. Consequently, the plasma channel covers the entire interelectrode space. The elongation of the primary streamer leads to an increase of the effective energy release region, which can result in a more efficient flow actuation mechanism.

ACS Style

Konstantinos Kourtzanidis; Laxminaryan L. Raja. Three-Electrode Sliding Nanosecond Dielectric Barrier Discharge Actuator: Modeling and Physics. AIAA Journal 2017, 55, 1393 -1404.

AMA Style

Konstantinos Kourtzanidis, Laxminaryan L. Raja. Three-Electrode Sliding Nanosecond Dielectric Barrier Discharge Actuator: Modeling and Physics. AIAA Journal. 2017; 55 (4):1393-1404.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Laxminaryan L. Raja. 2017. "Three-Electrode Sliding Nanosecond Dielectric Barrier Discharge Actuator: Modeling and Physics." AIAA Journal 55, no. 4: 1393-1404.

Journal article
Published: 10 March 2017 in Plasma Sources Science and Technology
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We report on a computational modeling study of a small scale plasma discharge formation with rectangular dielectric resonators. An array of rectangular dielectric slabs, separated by a gap of millimeter dimensions is used to provide resonant response when illuminated by an incident wave of 1.26 GHz. A coupled electromagnetic wave - plasma model is used to describe the breakdown, early response and steady state of the argon discharge. We characterize the plasma generation with respect to the input power, background gas pressure and gap size. It is found that the plasma discharge is generated mainly inside the gaps between the dielectric resonators at positions that correspond to the antinodes of the resonant enhanced electric field pattern. The enhancement of the electric field inside the gaps is due to a combination of leaking and displacement current radiation from the dielectric resonators. The plasma is sustained in over-critical densities due to the large skin depth with respect to the gap and plasma size. Electron densities are calculated in the order of 1018-1019 m-3 for a gas pressure of 10 torr, while they exceed 1020 m-3 in atmospheric conditions. Increase of input power leads to more intense ionization and thus faster plasma formation and results to a more symmetric plasma pattern. For low background gas pressure the discharge is diffusive and extends away from the gap region while in high pressure it is constricted inside the gap. An optimal gap size can be found to provide maximum electromagnetic energy transfer to the plasma. This fact demonstrates that the gap size dictates to a certain extent the resonant frequency and the Q-factor of the dielectric array and the breakdown fields can not be determined in a straight-forward way but they are functions of the resonators geometry and incident field frequency.

ACS Style

K Kourtzanidis; L L Raja. Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators. Plasma Sources Science and Technology 2017, 26, 045007 .

AMA Style

K Kourtzanidis, L L Raja. Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators. Plasma Sources Science and Technology. 2017; 26 (4):045007.

Chicago/Turabian Style

K Kourtzanidis; L L Raja. 2017. "Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators." Plasma Sources Science and Technology 26, no. 4: 045007.

Conference paper
Published: 05 January 2017 in 55th AIAA Aerospace Sciences Meeting
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ACS Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja. Modeling of a Sliding Nanosecond Dielectric Barrier Discharge Actuator for Flow Control. 55th AIAA Aerospace Sciences Meeting 2017, 1 .

AMA Style

Konstantinos Kourtzanidis, Laxminarayan L. Raja. Modeling of a Sliding Nanosecond Dielectric Barrier Discharge Actuator for Flow Control. 55th AIAA Aerospace Sciences Meeting. 2017; ():1.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja. 2017. "Modeling of a Sliding Nanosecond Dielectric Barrier Discharge Actuator for Flow Control." 55th AIAA Aerospace Sciences Meeting , no. : 1.

Journal article
Published: 01 July 2016 in Physics of Plasmas
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The electrical breakdown of air depends on the balance between creation and loss of charged particles. In fluid models, datasets of the rate coefficients used are obtained either from fits to experimental data or by solutions of the Boltzmann equation. Here, we study the accuracy of the commonly used models for ionization and attachment frequencies and their impact on the prediction of the breakdown threshold for air. We show that large errors can occur depending on the model and propose the most accurate dataset available for modeling of air breakdown phenomena.

ACS Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja. On the accuracy of the rate coefficients used in plasma fluid models for breakdown in air. Physics of Plasmas 2016, 23, 074503 .

AMA Style

Konstantinos Kourtzanidis, Laxminarayan L. Raja. On the accuracy of the rate coefficients used in plasma fluid models for breakdown in air. Physics of Plasmas. 2016; 23 (7):074503.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja. 2016. "On the accuracy of the rate coefficients used in plasma fluid models for breakdown in air." Physics of Plasmas 23, no. 7: 074503.

Text
Published: 28 May 2016 in Journal of Applied Physics
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We propose and study numerically a tunable and reconfigurable metamaterial based on coupled split-ring resonators (SRRs) and plasma discharges. The metamaterial couples the magnetic-electric response of the SRR structure with the electric response of a controllable plasma slab discharge that occupies a volume of the metamaterial. Because the electric response of a plasma depends on its constitutive parameters (electron density and collision frequency), the plasma-based metamaterial is tunable and active. Using three-dimensional numerical simulations, we analyze the coupled plasma-SRR metamaterial in terms of transmittance, performing parametric studies on the effects of electron density, collisional frequency, and the position of the plasma slab with respect to the SRR array. We find that the resonance frequency can be controlled by the plasma position or the plasma-to-collision frequency ratio, while transmittance is highly dependent on the latter.

ACS Style

Konstantinos Kourtzanidis; Dylan M. Pederson; Laxminarayan L. Raja. Electromagnetic wave energy flow control with a tunable and reconfigurable coupled plasma split-ring resonator metamaterial: A study of basic conditions and configurations. Journal of Applied Physics 2016, 119, 204904 .

AMA Style

Konstantinos Kourtzanidis, Dylan M. Pederson, Laxminarayan L. Raja. Electromagnetic wave energy flow control with a tunable and reconfigurable coupled plasma split-ring resonator metamaterial: A study of basic conditions and configurations. Journal of Applied Physics. 2016; 119 (20):204904.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Dylan M. Pederson; Laxminarayan L. Raja. 2016. "Electromagnetic wave energy flow control with a tunable and reconfigurable coupled plasma split-ring resonator metamaterial: A study of basic conditions and configurations." Journal of Applied Physics 119, no. 20: 204904.

Conference paper
Published: 02 January 2016 in 54th AIAA Aerospace Sciences Meeting
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ACS Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja; Sandra Coumar; Viviana Lago. Numerical simulation of DC glow discharges for shock wave modification. 54th AIAA Aerospace Sciences Meeting 2016, 1 .

AMA Style

Konstantinos Kourtzanidis, Laxminarayan L. Raja, Sandra Coumar, Viviana Lago. Numerical simulation of DC glow discharges for shock wave modification. 54th AIAA Aerospace Sciences Meeting. 2016; ():1.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Laxminarayan L. Raja; Sandra Coumar; Viviana Lago. 2016. "Numerical simulation of DC glow discharges for shock wave modification." 54th AIAA Aerospace Sciences Meeting , no. : 1.

Journal article
Published: 01 October 2015 in Computer Physics Communications
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ACS Style

Konstantinos Kourtzanidis; François Rogier; Jean-Pierre Boeuf. ADI-FDTD modeling of microwave plasma discharges in air towards fully three-dimensional simulations. Computer Physics Communications 2015, 195, 49 -60.

AMA Style

Konstantinos Kourtzanidis, François Rogier, Jean-Pierre Boeuf. ADI-FDTD modeling of microwave plasma discharges in air towards fully three-dimensional simulations. Computer Physics Communications. 2015; 195 ():49-60.

Chicago/Turabian Style

Konstantinos Kourtzanidis; François Rogier; Jean-Pierre Boeuf. 2015. "ADI-FDTD modeling of microwave plasma discharges in air towards fully three-dimensional simulations." Computer Physics Communications 195, no. : 49-60.

Text
Published: 14 September 2015 in Journal of Applied Physics
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The development of microwave plasma streamers at 110 GHz in atmospheric pressure air is numerically investigated taking into account the intense gas heating and its effects on the plasma formation and dynamics. The simulations are based on an implicit finite difference time domain formulation of Maxwell's equations coupled with a simple plasma fluid model and a real gas Euler equation solver. The numerical results show how the formation of a shock wave due to the large microwave power absorbed by the plasma and converted into gas heating strongly modifies the streamer elongation and dynamics. A microwave streamer filament stretches along its axis because of ionization-diffusion mechanisms in the enhanced electric field at the streamer tips. The change in the gas density distribution associated with the formation of shock wave due to gas heating strongly modifies the ionization and diffusion mechanisms and tends to limit the on-axis microwave streamer elongation by enhancing resonance effects. The simulations suggest that gas heating effects also play an important role in the observed bending or branching of microwave streamers after they have reached a critical length.

ACS Style

Konstantinos Kourtzanidis; François Rogier; Jean-Pierre Boeuf. Gas heating effects on the formation and propagation of a microwave streamer in air. Journal of Applied Physics 2015, 118, 103301 .

AMA Style

Konstantinos Kourtzanidis, François Rogier, Jean-Pierre Boeuf. Gas heating effects on the formation and propagation of a microwave streamer in air. Journal of Applied Physics. 2015; 118 (10):103301.

Chicago/Turabian Style

Konstantinos Kourtzanidis; François Rogier; Jean-Pierre Boeuf. 2015. "Gas heating effects on the formation and propagation of a microwave streamer in air." Journal of Applied Physics 118, no. 10: 103301.

Conference paper
Published: 01 May 2015 in 2015 IEEE International Conference on Plasma Sciences (ICOPS)
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Summary form only given. Microwave discharges can be used for efficient remote energy deposition. They can be created at the intersection of microwave beams, in the focus of microwave radiation or next to a metallic initiator (see Ref.[1] and references therein). Some possible applications of these discharges include flow control and combustion control. If the microwave electric field is overcritical in a localized region at atmospheric pressure, a microwave filament or streamer forms around seed electrons and elongates in a direction parallel to the electric field. Depending on the conditions, a pattern of parallel filaments can form and move in the direction of the source 2 . Complex structures of interconnected filaments can also develop under subcritical conditions in the presence of a metallic initiator 1 . Recent simulation works have been able to reproduce the formation and dynamics of microwave filament patterns 3 and of single microwave streamers over short periods of time 4 .Since the energy absorbed per unit volume in a microwave streamer can be considerable, gas heating arises, leading to the formation of a shock wave which can significantly affect the development and dynamics of microwave streamers. In this paper we present a fully self-consistent model combining Maxwell equations coupled with a simple description of the plasma and with inviscid Navier Stokes equations to study the energy deposition, gas heating and shockwave formation in a single microwave discharge generated at the intersection of two microwave beams at atmospheric pressure. We show that the gas temperature in the streamer can reach 5000 K in about 300 ns at the intersection of two beams of 2.5 MV/m field amplitude. Gas heating and the subsequent shockwave formation and gas density redistribution can lead to a complex dynamics of the streamer and to a limitation of its length to values on the order of λ/2 where O is the wavelength, as observed in some experiments1.

ACS Style

Konstantinos Kourtzanidis; F. Rogier; J.P. Boeuf; Kourtzanidis K.. Gas heating and shockwave effects on microwave streamer development in atmospheric pressure air. 2015 IEEE International Conference on Plasma Sciences (ICOPS) 2015, 1 -1.

AMA Style

Konstantinos Kourtzanidis, F. Rogier, J.P. Boeuf, Kourtzanidis K.. Gas heating and shockwave effects on microwave streamer development in atmospheric pressure air. 2015 IEEE International Conference on Plasma Sciences (ICOPS). 2015; ():1-1.

Chicago/Turabian Style

Konstantinos Kourtzanidis; F. Rogier; J.P. Boeuf; Kourtzanidis K.. 2015. "Gas heating and shockwave effects on microwave streamer development in atmospheric pressure air." 2015 IEEE International Conference on Plasma Sciences (ICOPS) , no. : 1-1.

Journal article
Published: 01 December 2014 in Physics of Plasmas
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ACS Style

Konstantinos Kourtzanidis; Jean-Pierre Boeuf; F. Rogier. Three dimensional simulations of pattern formation during high-pressure, freely localized microwave breakdown in air. Physics of Plasmas 2014, 21, 123513 .

AMA Style

Konstantinos Kourtzanidis, Jean-Pierre Boeuf, F. Rogier. Three dimensional simulations of pattern formation during high-pressure, freely localized microwave breakdown in air. Physics of Plasmas. 2014; 21 (12):123513.

Chicago/Turabian Style

Konstantinos Kourtzanidis; Jean-Pierre Boeuf; F. Rogier. 2014. "Three dimensional simulations of pattern formation during high-pressure, freely localized microwave breakdown in air." Physics of Plasmas 21, no. 12: 123513.