Computational study of simultaneous positive and negative streamer propagation in a twin surface dielectric barrier discharge via 2D PIC simulationsThe propagation mechanisms of plasma streamers have been observed and investigated in a surface dielectric barrier discharge (SDBD) using 2D particle in cell simulations. The investigations are carried out under a simulated air mixture, 80% N2 and 20% O2, at atmospheric pressure, 100 kPa, under both DC conditions and a pulsed DC waveform that represent AC conditions. The simulated geometry is a simplification of the symmetric and fully exposed SDBD resulting in the simultaneous ignition of both positive and negative streamers on either side of the Al2O3 dielectric barrier. In order to determine the interactivity of the two streamers, the propagation behavior for the positive and negative streamers are investigated both independently and simultaneously under identical constant voltage conditions. An additional focus is implored under a fast sub nanosecond rise time square voltage pulse alternating between positive and negative voltage conditions, thus providing insight into the dynamics of the streamers under alternating polarity switches. It is shown that the simultaneous ignition of both streamers, as well as using the pulsed DC conditions, provides both an enhanced discharge and an increased surface coverage. It is also shown that additional streamer branching may occur in a cross section that is difficult to experimentally observe. The enhanced discharge and surface coverage may be beneficial to many applications such as, but are not limited to: air purification, volatile organic compound removal, and plasma enhanced catalysis.
]]>Al2O3atmospheric pressureatmospheric pressure plasmasDBDfloating surface dischargenegative streamerns voltage pulsePIC-MCCpositive streamerSDBDPlasma Modeling and Simulation881ac5cc-2e97-482e-a7e0-078c6585e6352021-03-03T17:05:18+01:002022-02-14T16:39:28+01:00en-USAEPTApplied potential and electric fieldApplied potential and resulting XY electric field components. Contents are 501 rows by 1001 columns corresponding to the edges of 500x1000 cells, where each cell represents a square with side length 2.4 micrometers. This data set is only directly applicable to the pulsed-DC geometry. However, the leftmost 500 cell columns of each of the pulsed-DC geometry, and corresponding potential and electric field componetns, are valid for the right most 500 cell columnss of the DC geometry. Similarly, the rightmost 500 cell columns of each pulsed-DC geometry are valid for the leftmost 500 cell columns of the DC geometry.
]]>2021-03-03T17:49:06+01:002021-03-21T14:59:25+01:00application/zipzip21517689https://rdpcidat.rub.de/dataset/computational-study-simultaneous-positive-and-negative-streamer-propagation-twin-surface-0Cell GeometryConsidered geometry of the simulated conditions. Contents are 501 rows by 1001 columns corresponding to the edges of 500x1000 cells for Geo-PulsedDC and 501 rows by 4001 columns corresponding to the edges of 500x4000 cells for Geo-DC, where each cell represents a square with side length 2.4 micrometers. Each position contains the value of either 0 for gas, 1 for dielectric, or 2 metallic electrode.
]]>2021-03-03T18:15:57+01:002021-03-21T15:00:24+01:00application/zipzip9152https://rdpcidat.rub.de/dataset/computational-study-simultaneous-positive-and-negative-streamer-propagation-twin-surface-1PIC/MCC - DC conditionsContents are 500 rows by 4000 columns corresponding to the centers of 500x4000 cells, where each cell represents a square with side length 2.4 micrometers. The +8 kV potential is applied to the upper two electrodes, while the bottom electrodes are held constant at 0 V. Within the "BottomHalf" and "UpperHalf" folders are the electron densities when the DC geometry is simulated with seed electrons present only on either the cathodic or anodic side of the dielectrc, respectively. Within the "Full" folder are the electron densities and charge disparity maps when the DC geometry is simulated with seed electrons present on both sides of the dielectric. Multiple readouts of the simulations at timestamps of 0.2, and 1.0 ns are available for each data type.
]]>2021-03-03T18:21:55+01:002021-03-21T15:01:34+01:00application/zipzip5044045https://rdpcidat.rub.de/dataset/computational-study-simultaneous-positive-and-negative-streamer-propagation-twin-surface-2PIC/MCC - Pulsed DC conditionsContents are 500 rows by 1000 columns corresponding to the centers of 500x1000 cells, where each cell represents a square with side length 2.4 micrometers. The alternating +/- 8 kV potential is applied to the upper electrode, while the bottom electrode is held constant at 0 V. The electron densities, N2+ and O2+ Ion densities, charge disparities, and X and Y components of the electric field are found within their respective folders. Multiple readouts of the simulations at timestamps of 0.8, 0.9, 1.0, 1.7, 1.8, and 2.0 ns are available for each data set.
]]>2021-03-03T18:26:21+01:002021-03-21T15:02:08+01:00application/zipzip58520747https://rdpcidat.rub.de/dataset/computational-study-simultaneous-positive-and-negative-streamer-propagation-twin-surface-3DKANhttps://rdpcidat.rub.de