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Download and install ParaView here. In This tutorial we use v5.8.0 (some of the screenshots are from ParaView 5.0.1).
Upon launching ParaView, you have to find the PVTU file (usually the last one in the long list), click on it, and load it (press OK)
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Then ParaView will start loading the (quite large set of) files. So, be patient. For some reason, the first display will be a variable called glaciated (which is a mask for the glaciated area of Greenlandin latest versions of the test a constant unity field).
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We just want to render surface properties of a (very flat) 3D mesh. To ease the computing in further processing, we can apply a filter called Threshold, which can either be accessed by the menu Filter-> Alphabetical, or by the symbol that is marked with a red circle in the screenshot above.
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In the menu for Threshold, apply the settings as shown in the screenshot:
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To explain: Boundary numbering as written by Elmer starts at 101 and 103 is the third (and last) boundary, constituting the upper free surface of the ice-sheet. The gain in displaying only this one is that (instead of a three-dimensional visualization) we switched to two-dimensions and will need way less computations in the furtherthereby make the rendering easier. After pressing Apply, we should get the same picture as before (but just the surface).
In order to change the output to velocity, change the displayed variable in the blue circle of the screenshot above into velocity.tools bar from glaciated to velocity (leave default additional setting Magnitude)
You will end up with a picture like that …
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In order to actually better see what is going on at the fast outlet glaciers and simultaneously also inland, we have to switch to logarithmic scale. This is achieved by pressing First scale the range by pressing
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to these values
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Logarithmic scaling is included the settings for the colour scale (indicated by the red circle in the screenshot above).
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Toggle Use log scale when mapping data to colors and dismiss a possible error message connected to adjusting the range . You should end up with a rendering like this one:
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Despite earlier suggestions,we ask to stick with the default blue-to-red ParaView coloring. Press Apply and Close as shown above. Close
the Color Map Editor window by clicking the cross in the upper right corner (see blue circle in previous
screenshot).
In order to get a little bit of shading, one could scale the vertical coordinate by a factor 3 – this is done in the Transforming panel of the Threshold1 filter object. It can be found by scrolling down in the Properties tab (see red circle in screenshot below). Be aware that different versions (even on different platforms) of ParaView can have a varying selection of color-legends. In Just check out a similar, if you do not come across this particular one:
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After doing so, the screen should look like:
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The final step then is to take a screenshot of the scene. This is achieved by accessing the File menu and click the menu entry Save Screenshot therein. You will be provided with a panel that will provide you to choose where to save the file. Choose output format to be JPG. Choose a file name that consists of the name of your group and the date of the screenshot (similar to the example given below). Press OK and you (by default, if you did not choose to save elsewhere) will find the JPG in the same directory you launched ParaView from. After having filled in the name press OK.
Then a new window with Options for the screenshot pops up. It is OK to go with the defaults (default resolution of the rendered picture will depend on the resolution of your screen and the ParaView window therein).
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