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It is by now well understood that large sprite discharges at the low air densities of the mesosphere are physically similar to small streamer discharges in air at standard temperature and pressure. This similarity is based on Townsend…

大气与海洋物理 · 物理学 2010-07-13 Ute Ebert , Sander Nijdam , Chao Li , Alejandro Luque , Tanja Briels , Eddie van Veldhuizen

Large sprite discharges at high atmospheric altitudes have been found to be physically similar to small streamer discharges in air at sea level density. Based on this understanding, we investigate possible sprite discharges on Venus or…

大气与海洋物理 · 物理学 2010-06-15 Daria Dubrovin , Sander Nijdam , Eddie van Veldhuizen , Ute Ebert , Yoav Yair , Colin Price

In this review we describe a transient type of gas discharge which is commonly called a streamer discharge, as well as a few related phenomena in pulsed discharges. Streamers are propagating ionization fronts with self-organized field…

等离子体物理 · 物理学 2020-08-03 Sander Nijdam , Jannis Teunissen , Ute Ebert

We study the energy efficiency of species production by streamer discharges with a single voltage pulse in atmospheric dry air, using a 2D axisymmetric fluid model. Sixty different positive streamers are simulated by varying the electrode…

等离子体物理 · 物理学 2023-06-30 Baohong Guo , Jannis Teunissen

We compare simulations and experiments of single positive streamer discharges in air at 100 mbar, aiming towards model validation. Experimentally, streamers are generated in a plate-plate geometry with a protruding needle. We are able to…

等离子体物理 · 物理学 2021-10-27 Xiaoran Li , Siebe Dijcks , Sander Nijdam , Anbang Sun , Ute Ebert , Jannis Teunissen

Recently, a comparison of six codes for streamer discharge simulations were performed in [1]. In this comment, we discuss about the big differences between the results obtained by the different codes using the same deterministic model, and…

等离子体物理 · 物理学 2022-03-07 Xiang Li

Positive streamers in ambient air at pressures from 0.013 to 1 bar are investigated experimentally. The voltage applied to the anode needle ranges from 5 to 45 kV, the discharge gap from 1 to 16 cm. Using a "slow" voltage rise time of 100…

等离子体物理 · 物理学 2008-11-21 T. M. P. Briels , E. M. van Veldhuizen , Ute Ebert

In this paper, we study how streamer discharges are influenced by a previous voltage pulse using an axisymmetric fluid model. We simulate double-pulse positive streamers in N2-O2 mixtures containing 20% and 10% O2 at 1 bar. By varying the…

等离子体物理 · 物理学 2023-11-14 H. Malla , A. Martinez , U. Ebert , J. Teunissen

Nonequilibrium plasmas generated by spark discharges induce chemical, thermal, and flow dynamic effects that are beneficial in many applications such as plasmalysis, plasma-assisted combustion, and plasma flow control. Among the flow…

等离子体物理 · 物理学 2025-02-12 Edouard Roger , Pierre Mariotto , Christophe O Laux

A precise evaluation of the secondary particle production and propagation in the atmosphere is very important for the atmospheric neutrino oscillation studies. The issue is addressed with the extension of a previously developed full…

天体物理学 · 物理学 2009-11-11 L. Derome

Streamer discharges are often operated in a repetitively pulsed mode and are therefore influenced by species left over from the previous discharge, especially free electrons and ions. We have investigated these effects by applying two…

等离子体物理 · 物理学 2014-03-24 S. Nijdam , E. Takahashi , A. H. Markosyan , U. Ebert

In this paper we examine the puzzle of neutron formation in atmospheric discharge. While conventional explanation relies on photonuclear reactions, voltages used to recreate such discharges in the lab (1 MV) are thought to be not high…

核实验 · 物理学 2021-05-21 Max I. Fomitchev-Zamilov

This proceedings paper from 2004 contains figures of discharges in different gap lengths at the same potential that are not available elsewhere. The 2004 abstract: The evolution of streamers is known to depend on gas composition and…

等离子体物理 · 物理学 2008-08-19 T. M. P. Briels , E. M. van Veldhuizen , Ute Ebert

High-pressure and variable temperature single crystal synchrotron X-ray measurements combined with first-principles based molecular dynamics simulations study diffuse scattering in the relaxor ferroelectric system PSN…

材料科学 · 物理学 2015-05-13 P. Ganesh , E. Cockayne , M. Ahart , R. E. Cohen , B. Burton , R. J. Hemley , Yang Ren , Wenge Yang , Z-G Ye

The spatial non-uniformity of the electric field in air discharges, such as streamers, can influence the accuracy of spectroscopic diagnostic methods and hence the estimation of the peak electric field. In this work, we use a…

大气与海洋物理 · 物理学 2019-10-15 A. Malagón-Romero , F. J. Pérez-Invernón , A. Luque , F. J. Gordillo-Vázquez

We use a three-specie fluid model of electric discharge in air to simulate streamer evolution from the avalanche-to-streamer transition to the collision of opposite-polarity streamers. We estimate the upper limit on the production of…

空间物理 · 物理学 2018-08-03 Nikolai G. Lehtinen , Nikolai Østgaard

Combustion in automotive and aerospace applications employing diesel, gas turbine and liquid rocket engines is preceded by injection and mixing of fuel and oxidizer at high pressures, often exceeding mixture critical values. Experimental…

流体动力学 · 物理学 2019-07-30 Nek Sharan , Josette Bellan

Our recent paper on the "Search for Neutron Flux Generation in a Plasma Discharge Electrolytic Cell" [1] has as main goal the validation of the experiment in Ref.[2]. As a follow-up, Ref.[3] moves a set of objections on our procedure and…

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as a byproduct of this operation, an intense source of pulsed neutrinos via stopped-pion decay. The COHERENT collaboration uses this…

. Plasma jets are a high temperature flows, then all physical parameters are temperature dependent. This work aims to address the issue of simulating plasma-jet from the point of view of extending the applications to simulating flows with…

材料科学 · 物理学 2011-02-24 Rhida Djebeli , Bernard Pateyron , Mohamed Elganaoui , Habib Sammouda
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