Load Particles loads the particle data and allows displaying the particles and their trajectories. The number of particles to be loaded is shown and the user can select to load only part of them by specifying the value of Load Every n-th Particle.

After loading, the structure model with the particles at their start position appears in the Visualization area of GeoDict. In the Visualization panel, directly above it, parameters for the visualization of the particles during the transport simulation are selectable under the Particles tab. Find further details on how to visualize particles in GeoDict in the Visualization user guide

The computed results for the flow field can be loaded directly from the result file by clicking Load Flow Field under the Data Visualization tab. It can also be loaded by clicking File → Load Volume File in the menu bar and selecting the file FlowField.vap in the result folder.

If previously the movement of particles was visualized, uncheck the Particles tab, unless visualizing particles simultaneously with the flow field is explicitly desired.

Click Load Flow Field and, in the opening dialog, select the desired components of the flow field to be shown. Click OK. The options available for the visualization of the flow field are the same as in FlowDict, SatuDict, or FilterDict. A detailed description of the visualization options can be found in the FlowDict user guide.

When the Compute Spatial Particle Distribution (*.num) box is checked under the Output tab or in the post-processing options of the Results tab, *.num files are created during the post-processing. These files can be imported for visualization by clicking Load Spatial Particle Distribution File or Load All Particle Distribution Files under the Data Visualization tab.

In a *.num file, the number of particles present in a voxel at a given time step is stored. Before importing, the user must choose the time step of interest from the pull-down menu to the left of the Load Spatial Particle Distribution File button. The names displayed are formatted as Name_TimeStep_AbsoluteSimulationTime.num. For example, the file AddiDictResult_00007_3.000000e-04.num corresponds to the time step 7 of the simulation, which was reached at t=0.3 milliseconds.

After choosing the *.num file, click Load Spatial Particle Distribution File and, in the Loading volume file dialog, keep the only option shown, Particles:Number. Click OK. The fields from other time steps can be loaded at any time by going back to the Result Viewer, choosing a new time step *.num file, and clicking Load Spatial Particle Distribution File.

To access the fields from all time steps, choose Load All Particle Distribution Files.  All *.num files with spatial particle distribution available are listed under Volume Fields in the left part of the GUI. The spatial particle distribution of each file can be accessed by double clicking Number. Files already loaded are shown in black in the list and can be accessed much faster since they are kept in memory, other files are shown in gray in the list.

The initial default visualization after loading a spatial particle distribution must be optimized by modifying the parameters under the Volume Field tab in the Visualization Panel, above the Visualization Area. First, it might be useful to turn off the visualization of the structure model (Structure).  Additionally, under the Volume Field tab, select None for Interpolation and uncheck Smooth for Threshold by.

The Threshold By pull-down menu, with the entry Number for each of the *.num files (same for Color By) allows a clipping related to the data range. Move the slider, or enter directly, e.g. 1, to make the clipping value larger than the default zero and see the locations where the number of particles at the selected time step is equal or above 1, corresponding to the clipping mode (>=). In this case, only the voxels that contain 1 or more particles are visible. For example, the following visualization of spatial particle distribution is obtained when loading the field at time steps 3 and 7 and after setting the clipping to 1. For this visualization the computation was done with 100.000 particles.