![]() ![]() In the top menu, click on "Controls" → "Expressions". In the "Intercept" row of the "Slice operator attributes" previously opened. Shown using the color scaling on the left top of the window. On one side of the cube, the magnitude of bz(z=0) is Click somewhere on this windowĪnd drag the cube to change the viewpoint. The data cube slice is shown in "window 1". In the new window, choose "Orthogonal" to "Z" axis, and uncheck "Project to 2D". Go to the sub-window where the chosen function has appeared. Click on "Operator" → "Slicing" → "Slice". The opening menu shows several "PlotAtts" that you can also find We now draw the magnitude of the bz component of the magnetic field at z=0.Ĭlick on the "Add" button. In "File grouping" menu select "Off".Ĭhoose the simulation.b.from_t1.to_t2_cadence_n.xdmf file and open it. Window, set the "Path" to the path to your data. In the window named "VisIt ", click on the "Open" button. The following instructions are written for VisIt 2.10. ![]() Language, but the executables provide the required Python packages. The application is working on top of the Python The executables can be found on the VisIt websiteįor many plateforms. VisIt is an open-source interactive and scalable visualization,Īnimation, and analysis tool. Here are a few examples of data visualization: map of vertical magnetic field at the photosphere, magnetic field lines, and velocity contours. (2010) paper and mention the database at MEDOC by including a sentence like "This work used data provided by the Ohm database at the MEDOC data and operations centre (CNES / CNRS / Univ. in a scientific paper), please make a reference to theĪulanier et al. The XDMF file names are om_ t1.to_ t2.xdmf. The HDF5 file names are b nnn.h5 for the magnetic field, u nnn.h5 for the velocity field,Īnd r nnn.h5 for the density, where nnn is the simulation step. tar archive containing a set of output files from the simulation. The following full sets of output data are provided as. The XDMF file is used to provide visualization software all the information needed to interpret the data files.Ī tutorial for visualizing the data is provided below. The data are stored in a hierarchy, analogous to the structures of any high-level programming language.Īlong with the data files, XDMF files give the computation mesh and the time sequence of data output for each field. IDL, C++, Python.) with the appropriate libraries, which are widely available. It can be read using many applications (ParaView, VisIt.) and languages (Fortran, The output data of the simulation are stored in HDF5 files this format has been chosen for efficiency and portability. Near the magnetic field neutral line, the grid is inhomogeneous, withĪ higher number of cells near the neutral line.Īll values produced by the simulation are dimensionless and have to be scaled to the typical values inside an active region. During that motion, electric currents are generated and can be analyzed.Īs the length scales of the magnetic field are smaller On the two polarities resulting in magnetic field lines reconnection, inflation,Īnd ejection. To this initial state, a slow twisting motion is applied The initial state of the simulation presents the 3D potential magnetic field aroundĪn asymmetric magnetic bipole, resembling the typical asymmetric bipole ![]() The results of a previous run in the same configuration are presented With the OHM code from Observatoire de Paris / LESIA. ![]() Paris-Sud/CNES), provides output data from a run of a 3D line-tied zero-β resistive MHD numerical simulation This web page, hosted at the MEDOC data centre (CNRS/Univ. 3D line-tied zero-β resistive MHD numerical simulation ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |