Our sliceMovie dictionary ends up looking like this: What if we could do it another way? OffsetsĪ new keyword was added in v2012 that allows us to specify offsets to our original point, spaced along our normal vector. Or that’s how it used to be…now you have to faff about editing the slice VTP files, stripping out their TimeValue to make this work (let me know if you’ve had this issue & you want a workaround). Set up your view, get that rainbow colourmap looking fresh 😎 and use Save Animation to output your results. That can take a while & there’s a decent chance we’ll muck it up.īut, if you’re careful, name them consistently & sequentially ( _001 _002 … _101 etc) then ParaView will offer to read them in as a single pseudo time series.
Openfoam paraview clipping serial#
But best of all, the exported assets are serial (or reconstructed) even if you’re exporting in parallel, from a decomposed case.īut, if we want more than one slice, we need to add more planes to the surfaces sub-dictionary, one for each slice we want in our movie. It runs quickly & the output is lightweight. We could drop that snippet into a file called system/sliceMovie & run it using postProcess -func sliceMovie -latestTime to get our slice. In this example, the slice is called plane001, it’s located at the origin and its normal is aligned to the X-axis. The snippet below, uses the cuttingPlane option in the sampledSurfaces function object to create a slice for export. However, this approach can involve some pretty lengthy export dictionaries – let’s take a look at a basic one. If your model is on the large side (especially if it’s too large to read into your workstation) then you might need an approach like mine – export the slices from OpenFOAM & visualise them in ParaView. Although with bigger models you can expect the loading & subsequent slicing to be pretty slow. You can do it all in ParaView – read in your case, add a slice, make it look nice & then animate its position. You know the kind of animations I’m talking about – sweeping a plane through a region of interest, colouring it by an “insightful” flow property & never looking at it again 😉 You might call them something else, but I’m sure you’ve seen (& made) plenty of them.
So, here are some thoughts on using the offsets keyword ( introduced in v2012) to generate your slices, along with an idea for animating them in ParaView.
I like the speed of doing it this way, what I don’t like is prepping (& subsequently fiddling with) dictionary files to make it all happen, or to make a change. I make a lot of slice movies & I make them using slices exported from OpenFOAM & visualised in ParaView. It’s Robin from CFD Engine & I’ve been playing with some new (to me) post-pro functionality that might make it a little easier to produce the sweepy-slice movies that we’re all so keen on.
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