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To visualize the results, go to the navigation panel, go to the simulation run, and select Solution field. You might be asked if you would like to use the Legacy Interface or the new Beta Interface. In the Legacy interface, there will be a list of tools in the upper left and a geometry viewer on the right. These tools are called filters in ParaView and SimScale’s beta version is switching to that terminology so I’ll call them filters. There are also some other settings at the top of the geometry viewer, most notably the time frame settings (Black rewind, play, and fast-forward symbols). Most of the time, make sure you are analyzing the most recent time point in the simulation as this is likely the most accurate data available. Add a filter by finding the desired filter in the list and clicking the plus symbol on the right side of the label. This will bring up a panel, with settings specific to that filter. The 3 that I use most often are Cutting Planes, Isovolumes, and Particle Traces. After adding a filter, it can be found as a sub-item under the label. A filter’s visibility can be toggled by clicking the eye symbol to the left of it and can be removed by clicking the minus symbol to the right of it.
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 Figure 4.2: SimScale’s legacy interface. Tools can be found in the upper left panel, settings show up in the bottom left, and there are some other settings at the top, most notably the time frame settings (Black rewind, play, and fast-forward symbols). Most of the time, make sure you are analyzing the most recent time point in the simulation as this is likely the most accurate. |
If you add a filter for that uses a certain parameterscalar, say pressure, you will notice that a scale bar is automatically generated. The scale bar is automatically scaled relative to the maximum and minimum values in the domain. I always preferred to change the range to round numbers and kept the range consistent between simulations to make comparisons easier. This is done by going to the panel with the post-processing tools and clicking the drop-down arrow to the left of Results. Then select the parameter you’re using, which for this example is SCL: Pressure. In the panel that opens, you can change the colour scheme, the number of divisions in the scale, the range of the scale, toggle logarithmic mapping, and toggle node averaging.
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 Figure 4.5: After opening the file, setup the Properties settings, and click Apply.  Figure 4.6: After clicking Apply, the selected mesh regions should be displayed in the geometry viewer.  Figure 4.7: These are the tools to select the time point in the simulation, found near the top toolbar.  Figure 4.8: These are the tools to change how the geometry is coloured. The left icons control the colour map and range, while the left and middle drop-down menus (middle one is greyed out in this image, since it only applies to vector quantities) change which parameter variable is being displayed. |
After it loads, I would change the time point to be the most recent time point that was simulated as this should be the most accurate point of the simulation. Now, we can start processing the data. ParaView works by adding filters to the data file. Every filter you add will show up in the Pipeline Browser, below the .foam file. To see a list of all the filters ParaView has, go to the top menu bar, hover over Filters, and then hover over Alphabetical.
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