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Dataset results
6 results for “Magnetic helicity”
Data sets for "Magnetic helicity dissipation and production in an ideal MHD code"
<pre>The tar archive Helicity_in_IdealMHDCode.tar contains an index.html file with links to a directory with "Add-ons" to the FLASH code and the flash.par file. We also list the IDL directory with secondary data and plot routines for each figure used in the paper "Magnetic helicity dissipation and production in an ideal MHD code" by Axel Brandenburg (Nordita) and Evan Scannapiecoo (Arizona State University) with the URL https://arxiv.org/abs/1910.06074.</pre>
Datasets for "Hall cascade with fractional magnetic helicity in neutron star crusts"
<pre>The run directories contain time series and spectra as text files and other secondary data as idl save files. They can be read directly with the corresponding idl routines that are in the directory run_directories/run_idl. The run directories can be used to rerun the cases with the Pencil Code (https://github.com/pencil-code).</pre>
Dataset for "Helical dynamo growth at modest versus extreme magnetic Reynolds numbers"
<p>This directory contains the dataset (data.tar) and the post-processing script (post_processing.nb) of the manuscript "Helical dynamo growth at modest versus extreme magnetic Reynolds numbers" by Hongzhe Zhou and Eric Blackman.</p>
Data and input supporting: Evolutionary dynamics of counter-helical magnetic flux ropes
Open the record for dataset details and reuse information.
Efficiency of terahertz undulator radiation from short electron bunches moving in the field of permanently magnetized helices
<p>The motion and radiation of short dense bunches of ultrarelativistic electrons produced by laser-driven accelerators and moving in an undulator in the form of magnetized helices have been studied. Simulations demonstrate the possibility of generating wideband THz pulses with energies of hundreds of microjoules and relatively high efficiency in regimes close to the group synchronism of electrons with the waveguide mode.</p>
Data for article "Non-Stokesian dynamics of magnetic helical nanoswimmers under confinement
<h4><strong>Data for article "Non-Stokesian dynamics of magnetic helical nanoswimmers under confinement", A. Fazeli, V. Thakore, T. Ala-Nissila, M. Karttunen</strong></h4> <p><span>● </span>Published version: https://doi.org/10.1093/pnasnexus/pgae182</p> <p><span>● </span>Preprint version: https://doi.org/10.48550/arXiv.2311.00839</p> <p> </p> <p>The article studied the effect of the degree of confinement on the propulsion of electromagnetically propelled helical nanoswimmers. The helices were subjected to different degrees of confinement between two infinite parallel plates and driven using a rotating magnetic field at different frequencies. The degree of confinement (Gamma) is defined as the ratio of a helix’s outer diameter over the distance between the two boundary plates.</p> <p>At the highest level in the directory hierarchy, there are two folders, i.e., “Simulation_Production_Files”, and “Simulations_by_Nanoswimmers”. The first one consists of the source code of the Lattice-Boltzmann Method package implemented in LAMMPS used for running the simulations. It also includes a Matlab script used for calculating the required simulation variables to put in the LAMMPS input script for a given simulation.</p> <p>The other folder, i.e., “Simulations_by_Nanoswimmers”, has subfolders first broken down by the swimmer’s name (i.e., H0-8), then by Gamma, and finally by field driving frequency. Each simulation folder, i.e., at “Simulations_by_Nanoswimmers/H0*/Gamma_0.*/Field_Frequency_*/”, consists of seven types of file as described in the table below.</p> <table> <tbody> <tr> <td> <p><strong>File</strong></p> </td> <td> <p><strong>Description</strong></p> </td> </tr> <tr> <td> <p>script.in</p> </td> <td> <p>LAMMPS input script. LAMMPS executes calculations by reading commands from this file.</p> </td> </tr> <tr> <td> <p>H*.data</p> </td> <td> <p>Swimmer’s geometry data file. This lists the xyz coordinates of the constituent atoms of the helix’s surface area. </p> </td> </tr> <tr> <td> <p>bodies-*.lammpstrj</p> </td> <td> <p>A simulation output file. This lists the xyz coordinates of all helix’s atoms per timestep.</p> </td> </tr> <tr> <td> <p>H1cm-*.lammpstrj</p> </td> <td> <p>A simulation output file. This lists the xyz coordinates and linear velocities of the helix’s center of mass per timestep.</p> </td> </tr> <tr> <td> <p>H1omega-*.lammpstrj</p> </td> <td> <p>A simulation output file. This lists the xyz coordinates and linear velocities of an outer atom (i.e., an atom with a distance of minor radius plus major radius from the helix’s centerline). The tangential velocities of this atom are used to calculate the helix’s angular velocity. </p> </td> </tr> <tr> <td> <p>H1plane-*.lammpstrj</p> </td> <td> <p>A simulation output file. This lists the xyz coordinates of the three atoms used to construct a hypothetical plane fixed with respect to the helix body. This plane is used to keep track of orientation when calculating the helix’s angular velocity.</p> </td> </tr> <tr> <td> <p>torques-*.txt</p> </td> <td> <p>A simulation output file. These list the viscous drag torque experienced by the helix around the x-, y-, and z- axes.</p> </td> </tr> </tbody> </table> <p> </p> <p>The asterisks refer to the Shell (bash) wildcard character.</p> <p> </p>
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